File: navigation_controller_impl_unittest.cc

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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/basictypes.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "content/browser/frame_host/cross_site_transferring_request.h"
#include "content/browser/frame_host/navigation_controller_impl.h"
#include "content/browser/frame_host/navigation_entry_impl.h"
#include "content/browser/frame_host/navigation_entry_screenshot_manager.h"
#include "content/browser/frame_host/navigator.h"
#include "content/browser/site_instance_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/common/frame_messages.h"
#include "content/common/view_messages.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents_delegate.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/page_state.h"
#include "content/public/common/url_constants.h"
#include "content/public/test/mock_render_process_host.h"
#include "content/public/test/test_notification_tracker.h"
#include "content/public/test/test_utils.h"
#include "content/test/test_render_frame_host.h"
#include "content/test/test_render_view_host.h"
#include "content/test/test_web_contents.h"
#include "net/base/net_util.h"
#include "skia/ext/platform_canvas.h"
#include "testing/gtest/include/gtest/gtest.h"

using base::Time;

namespace {

// Creates an image with a 1x1 SkBitmap of the specified |color|.
gfx::Image CreateImage(SkColor color) {
  SkBitmap bitmap;
  bitmap.allocN32Pixels(1, 1);
  bitmap.eraseColor(color);
  return gfx::Image::CreateFrom1xBitmap(bitmap);
}

// Returns true if images |a| and |b| have the same pixel data.
bool DoImagesMatch(const gfx::Image& a, const gfx::Image& b) {
  // Assume that if the 1x bitmaps match, the images match.
  SkBitmap a_bitmap = a.AsBitmap();
  SkBitmap b_bitmap = b.AsBitmap();

  if (a_bitmap.width() != b_bitmap.width() ||
      a_bitmap.height() != b_bitmap.height()) {
    return false;
  }
  SkAutoLockPixels a_bitmap_lock(a_bitmap);
  SkAutoLockPixels b_bitmap_lock(b_bitmap);
  return memcmp(a_bitmap.getPixels(),
                b_bitmap.getPixels(),
                a_bitmap.getSize()) == 0;
}

class MockScreenshotManager : public content::NavigationEntryScreenshotManager {
 public:
  explicit MockScreenshotManager(content::NavigationControllerImpl* owner)
      : content::NavigationEntryScreenshotManager(owner),
        encoding_screenshot_in_progress_(false) {
  }

  ~MockScreenshotManager() override {}

  void TakeScreenshotFor(content::NavigationEntryImpl* entry) {
    SkBitmap bitmap;
    bitmap.allocPixels(SkImageInfo::Make(
        1, 1, kAlpha_8_SkColorType, kPremul_SkAlphaType));
    bitmap.eraseARGB(0, 0, 0, 0);
    encoding_screenshot_in_progress_ = true;
    OnScreenshotTaken(entry->GetUniqueID(), bitmap, content::READBACK_SUCCESS);
    WaitUntilScreenshotIsReady();
  }

  int GetScreenshotCount() {
    return content::NavigationEntryScreenshotManager::GetScreenshotCount();
  }

  void WaitUntilScreenshotIsReady() {
    if (!encoding_screenshot_in_progress_)
      return;
    message_loop_runner_ = new content::MessageLoopRunner;
    message_loop_runner_->Run();
  }

 private:
  // Overridden from content::NavigationEntryScreenshotManager:
  void TakeScreenshotImpl(content::RenderViewHost* host,
                          content::NavigationEntryImpl* entry) override {}

  void OnScreenshotSet(content::NavigationEntryImpl* entry) override {
    encoding_screenshot_in_progress_ = false;
    NavigationEntryScreenshotManager::OnScreenshotSet(entry);
    if (message_loop_runner_.get())
      message_loop_runner_->Quit();
  }

  scoped_refptr<content::MessageLoopRunner> message_loop_runner_;
  bool encoding_screenshot_in_progress_;

  DISALLOW_COPY_AND_ASSIGN(MockScreenshotManager);
};

}  // namespace

namespace content {

// TimeSmoother tests ----------------------------------------------------------

// With no duplicates, GetSmoothedTime should be the identity
// function.
TEST(TimeSmoother, Basic) {
  NavigationControllerImpl::TimeSmoother smoother;
  for (int64 i = 1; i < 1000; ++i) {
    base::Time t = base::Time::FromInternalValue(i);
    EXPECT_EQ(t, smoother.GetSmoothedTime(t));
  }
}

// With a single duplicate and timestamps thereafter increasing by one
// microsecond, the smoothed time should always be one behind.
TEST(TimeSmoother, SingleDuplicate) {
  NavigationControllerImpl::TimeSmoother smoother;
  base::Time t = base::Time::FromInternalValue(1);
  EXPECT_EQ(t, smoother.GetSmoothedTime(t));
  for (int64 i = 1; i < 1000; ++i) {
    base::Time expected_t = base::Time::FromInternalValue(i + 1);
    t = base::Time::FromInternalValue(i);
    EXPECT_EQ(expected_t, smoother.GetSmoothedTime(t));
  }
}

// With k duplicates and timestamps thereafter increasing by one
// microsecond, the smoothed time should always be k behind.
TEST(TimeSmoother, ManyDuplicates) {
  const int64 kNumDuplicates = 100;
  NavigationControllerImpl::TimeSmoother smoother;
  base::Time t = base::Time::FromInternalValue(1);
  for (int64 i = 0; i < kNumDuplicates; ++i) {
    base::Time expected_t = base::Time::FromInternalValue(i + 1);
    EXPECT_EQ(expected_t, smoother.GetSmoothedTime(t));
  }
  for (int64 i = 1; i < 1000; ++i) {
    base::Time expected_t =
        base::Time::FromInternalValue(i + kNumDuplicates);
    t = base::Time::FromInternalValue(i);
    EXPECT_EQ(expected_t, smoother.GetSmoothedTime(t));
  }
}

// If the clock jumps far back enough after a run of duplicates, it
// should immediately jump to that value.
TEST(TimeSmoother, ClockBackwardsJump) {
  const int64 kNumDuplicates = 100;
  NavigationControllerImpl::TimeSmoother smoother;
  base::Time t = base::Time::FromInternalValue(1000);
  for (int64 i = 0; i < kNumDuplicates; ++i) {
    base::Time expected_t = base::Time::FromInternalValue(i + 1000);
    EXPECT_EQ(expected_t, smoother.GetSmoothedTime(t));
  }
  t = base::Time::FromInternalValue(500);
  EXPECT_EQ(t, smoother.GetSmoothedTime(t));
}

// NavigationControllerTest ----------------------------------------------------

class NavigationControllerTest
    : public RenderViewHostImplTestHarness,
      public WebContentsObserver {
 public:
  NavigationControllerTest() : navigation_entry_committed_counter_(0) {
  }

  void SetUp() override {
    RenderViewHostImplTestHarness::SetUp();
    WebContents* web_contents = RenderViewHostImplTestHarness::web_contents();
    ASSERT_TRUE(web_contents);  // The WebContents should be created by now.
    WebContentsObserver::Observe(web_contents);
  }

  // WebContentsObserver:
  void DidStartNavigationToPendingEntry(
      const GURL& url,
      NavigationController::ReloadType reload_type) override {
    navigated_url_ = url;
  }

  void NavigationEntryCommitted(
      const LoadCommittedDetails& load_details) override {
    navigation_entry_committed_counter_++;
  }

  const GURL& navigated_url() const {
    return navigated_url_;
  }

  NavigationControllerImpl& controller_impl() {
    return static_cast<NavigationControllerImpl&>(controller());
  }

  const IPC::Message* GetLastNavigationRequest() {
    if (base::CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kEnableBrowserSideNavigation)) {
      return process()->sink().GetFirstMessageMatching(
          FrameMsg_RequestNavigation::ID);
    }
    return process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID);
  }

  const GURL GetNavigationURLFromIPC(const IPC::Message* message) {
    if (base::CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kEnableBrowserSideNavigation)) {
      Tuple<CommonNavigationParams, RequestNavigationParams> nav_params;
      FrameMsg_RequestNavigation::Read(message, &nav_params);
      return get<0>(nav_params).url;
    }
    Tuple<FrameMsg_Navigate_Params> nav_params;
    FrameMsg_Navigate::Read(message, &nav_params);
    return get<0>(nav_params).common_params.url;
  }

 protected:
  GURL navigated_url_;
  size_t navigation_entry_committed_counter_;
};

void RegisterForAllNavNotifications(TestNotificationTracker* tracker,
                                    NavigationController* controller) {
  tracker->ListenFor(NOTIFICATION_NAV_LIST_PRUNED,
                     Source<NavigationController>(controller));
  tracker->ListenFor(NOTIFICATION_NAV_ENTRY_CHANGED,
                     Source<NavigationController>(controller));
}

SiteInstance* GetSiteInstanceFromEntry(NavigationEntry* entry) {
  return NavigationEntryImpl::FromNavigationEntry(entry)->site_instance();
}

class TestWebContentsDelegate : public WebContentsDelegate {
 public:
  explicit TestWebContentsDelegate() :
      navigation_state_change_count_(0),
      repost_form_warning_count_(0) {}

  int navigation_state_change_count() {
    return navigation_state_change_count_;
  }

  int repost_form_warning_count() {
    return repost_form_warning_count_;
  }

  // Keep track of whether the tab has notified us of a navigation state change.
  void NavigationStateChanged(WebContents* source,
                              InvalidateTypes changed_flags) override {
    navigation_state_change_count_++;
  }

  void ShowRepostFormWarningDialog(WebContents* source) override {
    repost_form_warning_count_++;
  }

 private:
  // The number of times NavigationStateChanged has been called.
  int navigation_state_change_count_;

  // The number of times ShowRepostFormWarningDialog() was called.
  int repost_form_warning_count_;
};

// -----------------------------------------------------------------------------

TEST_F(NavigationControllerTest, Defaults) {
  NavigationControllerImpl& controller = controller_impl();

  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.GetLastCommittedEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), -1);
  EXPECT_EQ(controller.GetEntryCount(), 0);
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

TEST_F(NavigationControllerTest, GoToOffset) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const int kNumUrls = 5;
  std::vector<GURL> urls(kNumUrls);
  for (int i = 0; i < kNumUrls; ++i) {
    urls[i] = GURL(base::StringPrintf("http://www.a.com/%d", i));
  }

  main_test_rfh()->SendNavigate(0, urls[0]);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(urls[0], controller.GetVisibleEntry()->GetVirtualURL());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_FALSE(controller.CanGoToOffset(1));

  for (int i = 1; i <= 4; ++i) {
    main_test_rfh()->SendNavigate(i, urls[i]);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    EXPECT_EQ(urls[i], controller.GetVisibleEntry()->GetVirtualURL());
    EXPECT_TRUE(controller.CanGoToOffset(-i));
    EXPECT_FALSE(controller.CanGoToOffset(-(i + 1)));
    EXPECT_FALSE(controller.CanGoToOffset(1));
  }

  // We have loaded 5 pages, and are currently at the last-loaded page.
  int url_index = 4;

  enum Tests {
    GO_TO_MIDDLE_PAGE = -2,
    GO_FORWARDS = 1,
    GO_BACKWARDS = -1,
    GO_TO_BEGINNING = -2,
    GO_TO_END = 4,
    NUM_TESTS = 5,
  };

  const int test_offsets[NUM_TESTS] = {
    GO_TO_MIDDLE_PAGE,
    GO_FORWARDS,
    GO_BACKWARDS,
    GO_TO_BEGINNING,
    GO_TO_END
  };

  for (int test = 0; test < NUM_TESTS; ++test) {
    int offset = test_offsets[test];
    controller.GoToOffset(offset);
    url_index += offset;
    // Check that the GoToOffset will land on the expected page.
    EXPECT_EQ(urls[url_index], controller.GetPendingEntry()->GetVirtualURL());
    main_test_rfh()->SendNavigate(url_index, urls[url_index]);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    // Check that we can go to any valid offset into the history.
    for (size_t j = 0; j < urls.size(); ++j)
      EXPECT_TRUE(controller.CanGoToOffset(j - url_index));
    // Check that we can't go beyond the beginning or end of the history.
    EXPECT_FALSE(controller.CanGoToOffset(-(url_index + 1)));
    EXPECT_FALSE(controller.CanGoToOffset(urls.size() - url_index));
  }
}

TEST_F(NavigationControllerTest, LoadURL) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  // Creating a pending notification should not have issued any of the
  // notifications we're listening for.
  EXPECT_EQ(0U, notifications.size());

  // The load should now be pending.
  EXPECT_EQ(controller.GetEntryCount(), 0);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), -1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_FALSE(controller.GetLastCommittedEntry());
  ASSERT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntry(), controller.GetVisibleEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), -1);

  // Neither the timestamp nor the status code should have been set yet.
  EXPECT_TRUE(controller.GetPendingEntry()->GetTimestamp().is_null());
  EXPECT_EQ(0, controller.GetPendingEntry()->GetHttpStatusCode());

  // We should have gotten no notifications from the preceeding checks.
  EXPECT_EQ(0U, notifications.size());

  main_test_rfh()->PrepareForCommit(url1);
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The load should now be committed.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), 0);
  EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
      controller.GetLastCommittedEntry())->bindings());

  // The timestamp should have been set.
  EXPECT_FALSE(controller.GetVisibleEntry()->GetTimestamp().is_null());

  // Load another...
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // The load should now be pending.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  ASSERT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntry(), controller.GetVisibleEntry());
  // TODO(darin): maybe this should really be true?
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), 0);

  EXPECT_TRUE(controller.GetPendingEntry()->GetTimestamp().is_null());

  // Simulate the beforeunload ack for the cross-site transition, and then the
  // commit.
  main_test_rfh()->PrepareForCommit(url2);
  contents()->GetPendingMainFrame()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The load should now be committed.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), 1);

  EXPECT_FALSE(controller.GetVisibleEntry()->GetTimestamp().is_null());
}

namespace {

base::Time GetFixedTime(base::Time time) {
  return time;
}

}  // namespace

TEST_F(NavigationControllerTest, LoadURLSameTime) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Set the clock to always return a timestamp of 1.
  controller.SetGetTimestampCallbackForTest(
      base::Bind(&GetFixedTime, base::Time::FromInternalValue(1)));

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Load another...
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // Simulate the beforeunload ack for the cross-site transition, and then the
  // commit.
  main_test_rfh()->SendBeforeUnloadACK(true);
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The two loads should now be committed.
  ASSERT_EQ(controller.GetEntryCount(), 2);

  // Timestamps should be distinct despite the clock returning the
  // same value.
  EXPECT_EQ(1u,
            controller.GetEntryAtIndex(0)->GetTimestamp().ToInternalValue());
  EXPECT_EQ(2u,
            controller.GetEntryAtIndex(1)->GetTimestamp().ToInternalValue());
}

void CheckNavigationEntryMatchLoadParams(
    NavigationController::LoadURLParams& load_params,
    NavigationEntryImpl* entry) {
  EXPECT_EQ(load_params.url, entry->GetURL());
  EXPECT_EQ(load_params.referrer.url, entry->GetReferrer().url);
  EXPECT_EQ(load_params.referrer.policy, entry->GetReferrer().policy);
  EXPECT_EQ(load_params.transition_type, entry->GetTransitionType());
  EXPECT_EQ(load_params.extra_headers, entry->extra_headers());

  EXPECT_EQ(load_params.is_renderer_initiated, entry->is_renderer_initiated());
  EXPECT_EQ(load_params.base_url_for_data_url, entry->GetBaseURLForDataURL());
  if (!load_params.virtual_url_for_data_url.is_empty()) {
    EXPECT_EQ(load_params.virtual_url_for_data_url, entry->GetVirtualURL());
  }
  if (NavigationController::UA_OVERRIDE_INHERIT !=
      load_params.override_user_agent) {
    bool should_override = (NavigationController::UA_OVERRIDE_TRUE ==
        load_params.override_user_agent);
    EXPECT_EQ(should_override, entry->GetIsOverridingUserAgent());
  }
  EXPECT_EQ(load_params.browser_initiated_post_data.get(),
            entry->GetBrowserInitiatedPostData());
  EXPECT_EQ(load_params.transferred_global_request_id,
      entry->transferred_global_request_id());
}

TEST_F(NavigationControllerTest, LoadURLWithParams) {
  NavigationControllerImpl& controller = controller_impl();

  NavigationController::LoadURLParams load_params(GURL("http://foo"));
  load_params.referrer =
      Referrer(GURL("http://referrer"), blink::WebReferrerPolicyDefault);
  load_params.transition_type = ui::PAGE_TRANSITION_GENERATED;
  load_params.extra_headers = "content-type: text/plain";
  load_params.load_type = NavigationController::LOAD_TYPE_DEFAULT;
  load_params.is_renderer_initiated = true;
  load_params.override_user_agent = NavigationController::UA_OVERRIDE_TRUE;
  load_params.transferred_global_request_id = GlobalRequestID(2, 3);

  controller.LoadURLWithParams(load_params);
  NavigationEntryImpl* entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetPendingEntry());

  // The timestamp should not have been set yet.
  ASSERT_TRUE(entry);
  EXPECT_TRUE(entry->GetTimestamp().is_null());

  CheckNavigationEntryMatchLoadParams(load_params, entry);
}

TEST_F(NavigationControllerTest, LoadURLWithExtraParams_Data) {
  NavigationControllerImpl& controller = controller_impl();

  NavigationController::LoadURLParams load_params(
      GURL("data:text/html,dataurl"));
  load_params.load_type = NavigationController::LOAD_TYPE_DATA;
  load_params.base_url_for_data_url = GURL("http://foo");
  load_params.virtual_url_for_data_url = GURL(url::kAboutBlankURL);
  load_params.override_user_agent = NavigationController::UA_OVERRIDE_FALSE;

  controller.LoadURLWithParams(load_params);
  NavigationEntryImpl* entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetPendingEntry());

  CheckNavigationEntryMatchLoadParams(load_params, entry);
}

TEST_F(NavigationControllerTest, LoadURLWithExtraParams_HttpPost) {
  NavigationControllerImpl& controller = controller_impl();

  NavigationController::LoadURLParams load_params(GURL("https://posturl"));
  load_params.transition_type = ui::PAGE_TRANSITION_TYPED;
  load_params.load_type =
      NavigationController::LOAD_TYPE_BROWSER_INITIATED_HTTP_POST;
  load_params.override_user_agent = NavigationController::UA_OVERRIDE_TRUE;


  const unsigned char* raw_data =
      reinterpret_cast<const unsigned char*>("d\n\0a2");
  const int length = 5;
  std::vector<unsigned char> post_data_vector(raw_data, raw_data+length);
  scoped_refptr<base::RefCountedBytes> data =
      base::RefCountedBytes::TakeVector(&post_data_vector);
  load_params.browser_initiated_post_data = data.get();

  controller.LoadURLWithParams(load_params);
  NavigationEntryImpl* entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetPendingEntry());

  CheckNavigationEntryMatchLoadParams(load_params, entry);
}

// Tests what happens when the same page is loaded again.  Should not create a
// new session history entry. This is what happens when you press enter in the
// URL bar to reload: a pending entry is created and then it is discarded when
// the load commits (because WebCore didn't actually make a new entry).
TEST_F(NavigationControllerTest, LoadURL_SamePage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  ASSERT_TRUE(controller.GetVisibleEntry());
  const base::Time timestamp = controller.GetVisibleEntry()->GetTimestamp();
  EXPECT_FALSE(timestamp.is_null());

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // We should not have produced a new session history entry.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  // The timestamp should have been updated.
  //
  // TODO(akalin): Change this EXPECT_GE (and other similar ones) to
  // EXPECT_GT once we guarantee that timestamps are unique.
  EXPECT_GE(controller.GetVisibleEntry()->GetTimestamp(), timestamp);
}

// Load the same page twice, once as a GET and once as a POST.
// We should update the post state on the NavigationEntry.
TEST_F(NavigationControllerTest, LoadURL_SamePage_DifferentMethod) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url1;
  params.transition = ui::PAGE_TRANSITION_TYPED;
  params.is_post = true;
  params.post_id = 123;
  params.page_state = PageState::CreateForTesting(url1, false, 0, 0);
  main_test_rfh()->SendNavigateWithParams(&params);

  // The post data should be visible.
  NavigationEntry* entry = controller.GetVisibleEntry();
  ASSERT_TRUE(entry);
  EXPECT_TRUE(entry->GetHasPostData());
  EXPECT_EQ(entry->GetPostID(), 123);

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url1);

  // We should not have produced a new session history entry.
  ASSERT_EQ(controller.GetVisibleEntry(), entry);

  // The post data should have been cleared due to the GET.
  EXPECT_FALSE(entry->GetHasPostData());
  EXPECT_EQ(entry->GetPostID(), 0);
}

// Tests loading a URL but discarding it before the load commits.
TEST_F(NavigationControllerTest, LoadURL_Discarded) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  ASSERT_TRUE(controller.GetVisibleEntry());
  const base::Time timestamp = controller.GetVisibleEntry()->GetTimestamp();
  EXPECT_FALSE(timestamp.is_null());

  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  controller.DiscardNonCommittedEntries();
  EXPECT_EQ(0U, notifications.size());

  // Should not have produced a new session history entry.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  // Timestamp should not have changed.
  EXPECT_EQ(timestamp, controller.GetVisibleEntry()->GetTimestamp());
}

// Tests navigations that come in unrequested. This happens when the user
// navigates from the web page, and here we test that there is no pending entry.
TEST_F(NavigationControllerTest, LoadURL_NoPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make an existing committed entry.
  const GURL kExistingURL1("http://eh");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Do a new navigation without making a pending one.
  const GURL kNewURL("http://see");
  main_test_rfh()->SendNavigate(99, kNewURL);

  // There should no longer be any pending entry, and the third navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
}

// Tests navigating to a new URL when there is a new pending navigation that is
// not the one that just loaded. This will happen if the user types in a URL to
// somewhere slow, and then navigates the current page before the typed URL
// commits.
TEST_F(NavigationControllerTest, LoadURL_NewPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make an existing committed entry.
  const GURL kExistingURL1("http://eh");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Make a pending entry to somewhere new.
  const GURL kExistingURL2("http://bee");
  controller.LoadURL(
      kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());

  // After the beforeunload but before it commits, do a new navigation.
  main_test_rfh()->PrepareForCommit(kExistingURL2);
  const GURL kNewURL("http://see");
  contents()->GetMainFrame()->SendNavigate(3, kNewURL);

  // There should no longer be any pending entry, and the third navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
}

// Tests navigating to a new URL when there is a pending back/forward
// navigation. This will happen if the user hits back, but before that commits,
// they navigate somewhere new.
TEST_F(NavigationControllerTest, LoadURL_ExistingPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make some history.
  const GURL kExistingURL1("http://foo/eh");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL kExistingURL2("http://foo/bee");
  controller.LoadURL(
      kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(1, kExistingURL2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now make a pending back/forward navigation. The zeroth entry should be
  // pending.
  controller.GoBack();
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(0, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Before that commits, do a new navigation.
  const GURL kNewURL("http://foo/see");
  main_test_rfh()->SendNavigate(3, kNewURL);

  // There should no longer be any pending entry, and the third navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
}

// Tests navigating to a new URL when there is a pending back/forward
// navigation to a cross-process, privileged URL. This will happen if the user
// hits back, but before that commits, they navigate somewhere new.
TEST_F(NavigationControllerTest, LoadURL_PrivilegedPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make some history, starting with a privileged URL.
  const GURL kExistingURL1("http://privileged");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  // Pretend it has bindings so we can tell if we incorrectly copy it.
  main_test_rfh()->GetRenderViewHost()->AllowBindings(2);
  main_test_rfh()->PrepareForCommit(kExistingURL1);
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Navigate cross-process to a second URL.
  const GURL kExistingURL2("http://foo/eh");
  controller.LoadURL(
      kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->PrepareForCommit(kExistingURL2);
  TestRenderFrameHost* foo_rfh = contents()->GetPendingMainFrame();
  foo_rfh->SendNavigate(1, kExistingURL2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now make a pending back/forward navigation to a privileged entry.
  // The zeroth entry should be pending.
  controller.GoBack();
  foo_rfh->SendBeforeUnloadACK(true);
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(0, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(2, NavigationEntryImpl::FromNavigationEntry(
                controller.GetPendingEntry())->bindings());

  // Before that commits, do a new navigation.
  const GURL kNewURL("http://foo/bee");
  foo_rfh->SendNavigate(3, kNewURL);

  // There should no longer be any pending entry, and the third navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
                controller.GetLastCommittedEntry())->bindings());
}

// Tests navigating to an existing URL when there is a pending new navigation.
// This will happen if the user enters a URL, but before that commits, the
// current page fires history.back().
TEST_F(NavigationControllerTest, LoadURL_BackPreemptsPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make some history.
  const GURL kExistingURL1("http://foo/eh");
  controller.LoadURL(
      kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, kExistingURL1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL kExistingURL2("http://foo/bee");
  controller.LoadURL(
      kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(1, kExistingURL2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now make a pending new navigation.
  const GURL kNewURL("http://foo/see");
  controller.LoadURL(
      kNewURL, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Before that commits, a back navigation from the renderer commits.
  main_test_rfh()->SendNavigate(0, kExistingURL1);

  // There should no longer be any pending entry, and the back navigation we
  // just made should be committed.
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kExistingURL1, controller.GetVisibleEntry()->GetURL());
}

// Tests an ignored navigation when there is a pending new navigation.
// This will happen if the user enters a URL, but before that commits, the
// current blank page reloads.  See http://crbug.com/77507.
TEST_F(NavigationControllerTest, LoadURL_IgnorePreemptsPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Set a WebContentsDelegate to listen for state changes.
  scoped_ptr<TestWebContentsDelegate> delegate(new TestWebContentsDelegate());
  EXPECT_FALSE(contents()->GetDelegate());
  contents()->SetDelegate(delegate.get());

  // Without any navigations, the renderer starts at about:blank.
  const GURL kExistingURL(url::kAboutBlankURL);

  // Now make a pending new navigation.
  const GURL kNewURL("http://eh");
  controller.LoadURL(
      kNewURL, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(1, delegate->navigation_state_change_count());

  // Before that commits, a document.write and location.reload can cause the
  // renderer to send a FrameNavigate with page_id -1.
  main_test_rfh()->SendNavigate(-1, kExistingURL);

  // This should clear the pending entry and notify of a navigation state
  // change, so that we do not keep displaying kNewURL.
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(2, delegate->navigation_state_change_count());

  contents()->SetDelegate(NULL);
}

// Tests that the pending entry state is correct after an abort.
// We do not want to clear the pending entry, so that the user doesn't
// lose a typed URL.  (See http://crbug.com/9682.)
TEST_F(NavigationControllerTest, LoadURL_AbortDoesntCancelPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Set a WebContentsDelegate to listen for state changes.
  scoped_ptr<TestWebContentsDelegate> delegate(new TestWebContentsDelegate());
  EXPECT_FALSE(contents()->GetDelegate());
  contents()->SetDelegate(delegate.get());

  // Start with a pending new navigation.
  const GURL kNewURL("http://eh");
  controller.LoadURL(
      kNewURL, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(1, delegate->navigation_state_change_count());

  // It may abort before committing, if it's a download or due to a stop or
  // a new navigation from the user.
  FrameHostMsg_DidFailProvisionalLoadWithError_Params params;
  params.error_code = net::ERR_ABORTED;
  params.error_description = base::string16();
  params.url = kNewURL;
  params.showing_repost_interstitial = false;
  main_test_rfh()->OnMessageReceived(
      FrameHostMsg_DidFailProvisionalLoadWithError(0,  // routing_id
                                                   params));

  // This should not clear the pending entry or notify of a navigation state
  // change, so that we keep displaying kNewURL (until the user clears it).
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(1, delegate->navigation_state_change_count());
  NavigationEntry* pending_entry = controller.GetPendingEntry();

  // Ensure that a reload keeps the same pending entry.
  controller.Reload(true);
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(pending_entry, controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());

  contents()->SetDelegate(NULL);
}

// Tests that the pending URL is not visible during a renderer-initiated
// redirect and abort.  See http://crbug.com/83031.
TEST_F(NavigationControllerTest, LoadURL_RedirectAbortDoesntShowPendingURL) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // First make an existing committed entry.
  const GURL kExistingURL("http://foo/eh");
  controller.LoadURL(kExistingURL, content::Referrer(),
                     ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(1, kExistingURL);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Set a WebContentsDelegate to listen for state changes.
  scoped_ptr<TestWebContentsDelegate> delegate(new TestWebContentsDelegate());
  EXPECT_FALSE(contents()->GetDelegate());
  contents()->SetDelegate(delegate.get());

  // Now make a pending new navigation, initiated by the renderer.
  const GURL kNewURL("http://foo/bee");
  NavigationController::LoadURLParams load_url_params(kNewURL);
  load_url_params.transition_type = ui::PAGE_TRANSITION_TYPED;
  load_url_params.is_renderer_initiated = true;
  controller.LoadURLWithParams(load_url_params);
  EXPECT_EQ(0U, notifications.size());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(0, delegate->navigation_state_change_count());

  // The visible entry should be the last committed URL, not the pending one.
  EXPECT_EQ(kExistingURL, controller.GetVisibleEntry()->GetURL());

  // Now the navigation redirects. (There is no corresponding message here.)
  const GURL kRedirectURL("http://foo/see");

  // We don't want to change the NavigationEntry's url, in case it cancels.
  // Prevents regression of http://crbug.com/77786.
  EXPECT_EQ(kNewURL, controller.GetPendingEntry()->GetURL());

  // It may abort before committing, if it's a download or due to a stop or
  // a new navigation from the user.
  FrameHostMsg_DidFailProvisionalLoadWithError_Params params;
  params.error_code = net::ERR_ABORTED;
  params.error_description = base::string16();
  params.url = kRedirectURL;
  params.showing_repost_interstitial = false;
  main_test_rfh()->OnMessageReceived(
      FrameHostMsg_DidFailProvisionalLoadWithError(0,  // routing_id
                                                   params));

  // Because the pending entry is renderer initiated and not visible, we
  // clear it when it fails.
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(1, delegate->navigation_state_change_count());

  // The visible entry should be the last committed URL, not the pending one,
  // so that no spoof is possible.
  EXPECT_EQ(kExistingURL, controller.GetVisibleEntry()->GetURL());

  contents()->SetDelegate(NULL);
}

// Ensure that NavigationEntries track which bindings their RenderViewHost had
// at the time they committed.  http://crbug.com/173672.
TEST_F(NavigationControllerTest, LoadURL_WithBindings) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);
  std::vector<GURL> url_chain;

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  // Navigate to a first, unprivileged URL.
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(NavigationEntryImpl::kInvalidBindings,
            NavigationEntryImpl::FromNavigationEntry(
                controller.GetPendingEntry())->bindings());

  // Commit.
  TestRenderFrameHost* orig_rfh = contents()->GetMainFrame();
  orig_rfh->PrepareForCommit(url1);
  orig_rfh->SendNavigate(0, url1);
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
      controller.GetLastCommittedEntry())->bindings());

  // Manually increase the number of active frames in the SiteInstance
  // that orig_rfh belongs to, to prevent it from being destroyed when
  // it gets swapped out, so that we can reuse orig_rfh when the
  // controller goes back.
  orig_rfh->GetSiteInstance()->increment_active_frame_count();

  // Navigate to a second URL, simulate the beforeunload ack for the cross-site
  // transition, and set bindings on the pending RenderViewHost to simulate a
  // privileged url.
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  orig_rfh->PrepareForCommit(url2);
  TestRenderFrameHost* new_rfh = contents()->GetPendingMainFrame();
  new_rfh->GetRenderViewHost()->AllowBindings(1);
  new_rfh->SendNavigate(1, url2);

  // The second load should be committed, and bindings should be remembered.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_EQ(1, NavigationEntryImpl::FromNavigationEntry(
      controller.GetLastCommittedEntry())->bindings());

  // Going back, the first entry should still appear unprivileged.
  controller.GoBack();
  new_rfh->SendBeforeUnloadACK(true);
  orig_rfh->SendNavigate(0, url1);
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
      controller.GetLastCommittedEntry())->bindings());
}

TEST_F(NavigationControllerTest, Reload) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  ASSERT_TRUE(controller.GetVisibleEntry());
  controller.GetVisibleEntry()->SetTitle(base::ASCIIToUTF16("Title"));
  controller.Reload(true);
  EXPECT_EQ(0U, notifications.size());

  const base::Time timestamp = controller.GetVisibleEntry()->GetTimestamp();
  EXPECT_FALSE(timestamp.is_null());

  // The reload is pending.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  // Make sure the title has been cleared (will be redrawn just after reload).
  // Avoids a stale cached title when the new page being reloaded has no title.
  // See http://crbug.com/96041.
  EXPECT_TRUE(controller.GetVisibleEntry()->GetTitle().empty());

  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now the reload is committed.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  // The timestamp should have been updated.
  ASSERT_TRUE(controller.GetVisibleEntry());
  EXPECT_GE(controller.GetVisibleEntry()->GetTimestamp(), timestamp);
}

// Tests what happens when a reload navigation produces a new page.
TEST_F(NavigationControllerTest, Reload_GeneratesNewPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.Reload(true);
  EXPECT_EQ(0U, notifications.size());

  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now the reload is committed.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// This test ensures that when a guest renderer reloads, the reload goes through
// without ending up in the "we have a wrong process for the URL" branch in
// NavigationControllerImpl::ReloadInternal.
TEST_F(NavigationControllerTest, ReloadWithGuest) {
  NavigationControllerImpl& controller = controller_impl();

  const GURL url1("http://foo1");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url1);
  ASSERT_TRUE(controller.GetVisibleEntry());

  // Make the entry believe its RenderProcessHost is a guest.
  NavigationEntryImpl* entry1 =
      NavigationEntryImpl::FromNavigationEntry(controller.GetVisibleEntry());
  reinterpret_cast<MockRenderProcessHost*>(
      entry1->site_instance()->GetProcess())->set_is_isolated_guest(true);

  // And reload.
  controller.Reload(true);

  // The reload is pending. Check that the NavigationEntry didn't get replaced
  // because of having the wrong process.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);

  NavigationEntryImpl* entry2 =
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry());
  EXPECT_EQ(entry1, entry2);
}

#if !defined(OS_ANDROID)  // http://crbug.com/157428
TEST_F(NavigationControllerTest, ReloadOriginalRequestURL) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL original_url("http://foo1");
  const GURL final_url("http://foo2");

  // Load up the original URL, but get redirected.
  controller.LoadURL(
      original_url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigateWithOriginalRequestURL(
      0, final_url, original_url);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The NavigationEntry should save both the original URL and the final
  // redirected URL.
  EXPECT_EQ(
      original_url, controller.GetVisibleEntry()->GetOriginalRequestURL());
  EXPECT_EQ(final_url, controller.GetVisibleEntry()->GetURL());

  // Reload using the original URL.
  controller.GetVisibleEntry()->SetTitle(base::ASCIIToUTF16("Title"));
  controller.ReloadOriginalRequestURL(false);
  EXPECT_EQ(0U, notifications.size());

  // The reload is pending.  The request should point to the original URL.
  EXPECT_EQ(original_url, navigated_url());
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  // Make sure the title has been cleared (will be redrawn just after reload).
  // Avoids a stale cached title when the new page being reloaded has no title.
  // See http://crbug.com/96041.
  EXPECT_TRUE(controller.GetVisibleEntry()->GetTitle().empty());

  // Send that the navigation has proceeded; say it got redirected again.
  main_test_rfh()->SendNavigate(0, final_url);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now the reload is committed.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

#endif  // !defined(OS_ANDROID)

// Test that certain non-persisted NavigationEntryImpl values get reset after
// commit.
TEST_F(NavigationControllerTest, ResetEntryValuesAfterCommit) {
  NavigationControllerImpl& controller = controller_impl();

  // The value of "should replace entry" will be tested, but it's an error to
  // specify it when there are no entries. Create a simple entry to be replaced.
  const GURL url0("http://foo0");
  controller.LoadURL(
      url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url0);

  // Set up the pending entry.
  const GURL url1("http://foo1");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // Set up some sample values.
  const unsigned char* raw_data =
      reinterpret_cast<const unsigned char*>("post\n\n\0data");
  const int length = 11;
  std::vector<unsigned char> post_data_vector(raw_data, raw_data+length);
  scoped_refptr<base::RefCountedBytes> post_data =
      base::RefCountedBytes::TakeVector(&post_data_vector);
  GlobalRequestID transfer_id(3, 4);

  // Set non-persisted values on the pending entry.
  NavigationEntryImpl* pending_entry =
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry());
  pending_entry->SetBrowserInitiatedPostData(post_data.get());
  pending_entry->set_is_renderer_initiated(true);
  pending_entry->set_transferred_global_request_id(transfer_id);
  pending_entry->set_should_replace_entry(true);
  pending_entry->set_should_clear_history_list(true);
  EXPECT_EQ(post_data.get(), pending_entry->GetBrowserInitiatedPostData());
  EXPECT_TRUE(pending_entry->is_renderer_initiated());
  EXPECT_EQ(transfer_id, pending_entry->transferred_global_request_id());
  EXPECT_TRUE(pending_entry->should_replace_entry());
  EXPECT_TRUE(pending_entry->should_clear_history_list());

  // Fake a commit response.
  main_test_rfh()->SendNavigate(1, url1);

  // Certain values that are only used for pending entries get reset after
  // commit.
  NavigationEntryImpl* committed_entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetLastCommittedEntry());
  EXPECT_FALSE(committed_entry->GetBrowserInitiatedPostData());
  EXPECT_FALSE(committed_entry->is_renderer_initiated());
  EXPECT_EQ(GlobalRequestID(-1, -1),
            committed_entry->transferred_global_request_id());
  EXPECT_FALSE(committed_entry->should_replace_entry());
  EXPECT_FALSE(committed_entry->should_clear_history_list());
}

// Test that Redirects are preserved after a commit.
TEST_F(NavigationControllerTest, RedirectsAreNotResetByCommit) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // Set up some redirect values.
  std::vector<GURL> redirects;
  redirects.push_back(GURL("http://foo2"));

  // Set redirects on the pending entry.
  NavigationEntryImpl* pending_entry =
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry());
  pending_entry->SetRedirectChain(redirects);
  EXPECT_EQ(1U, pending_entry->GetRedirectChain().size());
  EXPECT_EQ(GURL("http://foo2"), pending_entry->GetRedirectChain()[0]);

  // Normal navigation will preserve redirects in the committed entry.
  main_test_rfh()->SendNavigateWithRedirects(0, url1, redirects);
  NavigationEntryImpl* committed_entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetLastCommittedEntry());
  ASSERT_EQ(1U, committed_entry->GetRedirectChain().size());
  EXPECT_EQ(GURL("http://foo2"), committed_entry->GetRedirectChain()[0]);
}

// Tests what happens when we navigate back successfully
TEST_F(NavigationControllerTest, Back) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL url2("http://foo2");
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoBack();
  EXPECT_EQ(0U, notifications.size());

  // We should now have a pending navigation to go back.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoToOffset(-1));
  EXPECT_TRUE(controller.CanGoForward());
  EXPECT_TRUE(controller.CanGoToOffset(1));
  EXPECT_FALSE(controller.CanGoToOffset(2));  // Cannot go foward 2 steps.

  // Timestamp for entry 1 should be on or after that of entry 0.
  EXPECT_FALSE(controller.GetEntryAtIndex(0)->GetTimestamp().is_null());
  EXPECT_GE(controller.GetEntryAtIndex(1)->GetTimestamp(),
            controller.GetEntryAtIndex(0)->GetTimestamp());

  main_test_rfh()->SendNavigate(0, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The back navigation completed successfully.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoToOffset(-1));
  EXPECT_TRUE(controller.CanGoForward());
  EXPECT_TRUE(controller.CanGoToOffset(1));
  EXPECT_FALSE(controller.CanGoToOffset(2));  // Cannot go foward 2 steps.

  // Timestamp for entry 0 should be on or after that of entry 1
  // (since we went back to it).
  EXPECT_GE(controller.GetEntryAtIndex(0)->GetTimestamp(),
            controller.GetEntryAtIndex(1)->GetTimestamp());
}

// Tests what happens when a back navigation produces a new page.
TEST_F(NavigationControllerTest, Back_GeneratesNewPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoBack();
  EXPECT_EQ(0U, notifications.size());

  // We should now have a pending navigation to go back.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_TRUE(controller.CanGoForward());

  main_test_rfh()->SendNavigate(2, url3);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The back navigation resulted in a completely new navigation.
  // TODO(darin): perhaps this behavior will be confusing to users?
  EXPECT_EQ(controller.GetEntryCount(), 3);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// Receives a back message when there is a new pending navigation entry.
TEST_F(NavigationControllerTest, Back_NewPending) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL kUrl1("http://foo1");
  const GURL kUrl2("http://foo2");
  const GURL kUrl3("http://foo3");

  // First navigate two places so we have some back history.
  main_test_rfh()->SendNavigate(0, kUrl1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // controller.LoadURL(kUrl2, ui::PAGE_TRANSITION_TYPED);
  main_test_rfh()->SendNavigate(1, kUrl2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Now start a new pending navigation and go back before it commits.
  controller.LoadURL(
      kUrl3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(kUrl3, controller.GetPendingEntry()->GetURL());
  controller.GoBack();

  // The pending navigation should now be the "back" item and the new one
  // should be gone.
  EXPECT_EQ(0, controller.GetPendingEntryIndex());
  EXPECT_EQ(kUrl1, controller.GetPendingEntry()->GetURL());
}

// Receives a back message when there is a different renavigation already
// pending.
TEST_F(NavigationControllerTest, Back_OtherBackPending) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL kUrl1("http://foo/1");
  const GURL kUrl2("http://foo/2");
  const GURL kUrl3("http://foo/3");

  // First navigate three places so we have some back history.
  main_test_rfh()->SendNavigate(0, kUrl1);
  main_test_rfh()->SendNavigate(1, kUrl2);
  main_test_rfh()->SendNavigate(2, kUrl3);

  // With nothing pending, say we get a navigation to the second entry.
  main_test_rfh()->SendNavigate(1, kUrl2);

  // We know all the entries have the same site instance, so we can just grab
  // a random one for looking up other entries.
  SiteInstance* site_instance =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetLastCommittedEntry())->site_instance();

  // That second URL should be the last committed and it should have gotten the
  // new title.
  EXPECT_EQ(kUrl2, controller.GetEntryWithPageID(site_instance, 1)->GetURL());
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());

  // Now go forward to the last item again and say it was committed.
  controller.GoForward();
  main_test_rfh()->SendNavigate(2, kUrl3);

  // Now start going back one to the second page. It will be pending.
  controller.GoBack();
  EXPECT_EQ(1, controller.GetPendingEntryIndex());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());

  // Not synthesize a totally new back event to the first page. This will not
  // match the pending one.
  main_test_rfh()->SendNavigate(0, kUrl1);

  // The committed navigation should clear the pending entry.
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());

  // But the navigated entry should be the last committed.
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(kUrl1, controller.GetLastCommittedEntry()->GetURL());
}

// Tests what happens when we navigate forward successfully.
TEST_F(NavigationControllerTest, Forward) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoBack();
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoForward();

  // We should now have a pending navigation to go forward.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_TRUE(controller.CanGoToOffset(-1));
  EXPECT_FALSE(controller.CanGoToOffset(-2));  // Cannot go back 2 steps.
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_FALSE(controller.CanGoToOffset(1));

  // Timestamp for entry 0 should be on or after that of entry 1
  // (since we went back to it).
  EXPECT_FALSE(controller.GetEntryAtIndex(0)->GetTimestamp().is_null());
  EXPECT_GE(controller.GetEntryAtIndex(0)->GetTimestamp(),
            controller.GetEntryAtIndex(1)->GetTimestamp());

  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // The forward navigation completed successfully.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_TRUE(controller.CanGoToOffset(-1));
  EXPECT_FALSE(controller.CanGoToOffset(-2));  // Cannot go back 2 steps.
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_FALSE(controller.CanGoToOffset(1));

  // Timestamp for entry 1 should be on or after that of entry 0
  // (since we went forward to it).
  EXPECT_GE(controller.GetEntryAtIndex(1)->GetTimestamp(),
            controller.GetEntryAtIndex(0)->GetTimestamp());
}

// Tests what happens when a forward navigation produces a new page.
TEST_F(NavigationControllerTest, Forward_GeneratesNewPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const GURL url3("http://foo3");

  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoBack();
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  controller.GoForward();
  EXPECT_EQ(0U, notifications.size());

  // Should now have a pending navigation to go forward.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_EQ(controller.GetPendingEntryIndex(), 1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());

  main_test_rfh()->SendNavigate(2, url3);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(notifications.Check1AndReset(NOTIFICATION_NAV_LIST_PRUNED));

  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// Two consequent navigation for the same URL entered in should be considered
// as SAME_PAGE navigation even when we are redirected to some other page.
TEST_F(NavigationControllerTest, Redirect) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");  // Redirection target

  // First request
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Second request
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_SERVER_REDIRECT;
  params.redirects.push_back(GURL("http://foo1"));
  params.redirects.push_back(GURL("http://foo2"));
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  LoadCommittedDetails details;

  EXPECT_EQ(0U, notifications.size());
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  EXPECT_TRUE(details.type == NAVIGATION_TYPE_SAME_PAGE);
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());

  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// Similar to Redirect above, but the first URL is requested by POST,
// the second URL is requested by GET. NavigationEntry::has_post_data_
// must be cleared. http://crbug.com/21245
TEST_F(NavigationControllerTest, PostThenRedirect) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");  // Redirection target

  // First request as POST
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  controller.GetVisibleEntry()->SetHasPostData(true);

  EXPECT_EQ(0U, notifications.size());
  main_test_rfh()->SendNavigate(0, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Second request
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_SERVER_REDIRECT;
  params.redirects.push_back(GURL("http://foo1"));
  params.redirects.push_back(GURL("http://foo2"));
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  LoadCommittedDetails details;

  EXPECT_EQ(0U, notifications.size());
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  EXPECT_TRUE(details.type == NAVIGATION_TYPE_SAME_PAGE);
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
  EXPECT_FALSE(controller.GetVisibleEntry()->GetHasPostData());

  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// A redirect right off the bat should be a NEW_PAGE.
TEST_F(NavigationControllerTest, ImmediateRedirect) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");  // Redirection target

  // First request
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_SERVER_REDIRECT;
  params.redirects.push_back(GURL("http://foo1"));
  params.redirects.push_back(GURL("http://foo2"));
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  LoadCommittedDetails details;

  EXPECT_EQ(0U, notifications.size());
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  EXPECT_TRUE(details.type == NAVIGATION_TYPE_NEW_PAGE);
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());

  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

// Tests navigation via link click within a subframe. A new navigation entry
// should be created.
TEST_F(NavigationControllerTest, NewSubframe) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL url2("http://foo2");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_MANUAL_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  LoadCommittedDetails details;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(url1, details.previous_url);
  EXPECT_FALSE(details.is_in_page);
  EXPECT_FALSE(details.is_main_frame);

  // The new entry should be appended.
  EXPECT_EQ(2, controller.GetEntryCount());

  // New entry should refer to the new page, but the old URL (entries only
  // reflect the toplevel URL).
  EXPECT_EQ(url1, details.entry->GetURL());
  EXPECT_EQ(params.page_id, details.entry->GetPageID());
}

// Some pages create a popup, then write an iframe into it. This causes a
// subframe navigation without having any committed entry. Such navigations
// just get thrown on the ground, but we shouldn't crash.
TEST_F(NavigationControllerTest, SubframeOnEmptyPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Navigation controller currently has no entries.
  const GURL url("http://foo2");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url;
  params.transition = ui::PAGE_TRANSITION_AUTO_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url);

  LoadCommittedDetails details;
  EXPECT_FALSE(controller.RendererDidNavigate(main_test_rfh(), params,
                                              &details));
  EXPECT_EQ(0U, notifications.size());
}

// Auto subframes are ones the page loads automatically like ads. They should
// not create new navigation entries.
TEST_F(NavigationControllerTest, AutoSubframe) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  const GURL url2("http://foo2");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_AUTO_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  // Navigating should do nothing.
  LoadCommittedDetails details;
  EXPECT_FALSE(controller.RendererDidNavigate(main_test_rfh(), params,
                                              &details));
  EXPECT_EQ(0U, notifications.size());

  // There should still be only one entry.
  EXPECT_EQ(1, controller.GetEntryCount());
}

// Tests navigation and then going back to a subframe navigation.
TEST_F(NavigationControllerTest, BackSubframe) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Main page.
  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // First manual subframe navigation.
  const GURL url2("http://foo2");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_MANUAL_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);

  // This should generate a new entry.
  LoadCommittedDetails details;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(2, controller.GetEntryCount());

  // Second manual subframe navigation should also make a new entry.
  const GURL url3("http://foo3");
  params.page_id = 2;
  params.url = url3;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetCurrentEntryIndex());

  // Go back one.
  controller.GoBack();
  params.url = url2;
  params.page_id = 1;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetCurrentEntryIndex());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());

  // Go back one more.
  controller.GoBack();
  params.url = url1;
  params.page_id = 0;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetCurrentEntryIndex());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
}

TEST_F(NavigationControllerTest, LinkClick) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Should not have produced a new session history entry.
  EXPECT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
}

TEST_F(NavigationControllerTest, InPage) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Main page.
  const GURL url1("http://foo");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Ensure main page navigation to same url respects the was_within_same_page
  // hint provided in the params.
  FrameHostMsg_DidCommitProvisionalLoad_Params self_params;
  self_params.page_id = 0;
  self_params.url = url1;
  self_params.transition = ui::PAGE_TRANSITION_LINK;
  self_params.should_update_history = false;
  self_params.gesture = NavigationGestureUser;
  self_params.is_post = false;
  self_params.page_state = PageState::CreateFromURL(url1);
  self_params.was_within_same_page = true;

  LoadCommittedDetails details;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), self_params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_TRUE(details.did_replace_entry);
  EXPECT_EQ(1, controller.GetEntryCount());

  // Fragment navigation to a new page_id.
  const GURL url2("http://foo#a");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);
  params.was_within_same_page = true;

  // This should generate a new entry.
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_FALSE(details.did_replace_entry);
  EXPECT_EQ(2, controller.GetEntryCount());

  // Go back one.
  FrameHostMsg_DidCommitProvisionalLoad_Params back_params(params);
  controller.GoBack();
  back_params.url = url1;
  back_params.page_id = 0;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), back_params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetCurrentEntryIndex());
  EXPECT_EQ(back_params.url, controller.GetVisibleEntry()->GetURL());

  // Go forward
  FrameHostMsg_DidCommitProvisionalLoad_Params forward_params(params);
  controller.GoForward();
  forward_params.url = url2;
  forward_params.page_id = 1;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), forward_params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetCurrentEntryIndex());
  EXPECT_EQ(forward_params.url,
            controller.GetVisibleEntry()->GetURL());

  // Now go back and forward again. This is to work around a bug where we would
  // compare the incoming URL with the last committed entry rather than the
  // one identified by an existing page ID. This would result in the second URL
  // losing the reference fragment when you navigate away from it and then back.
  controller.GoBack();
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), back_params,
                                             &details));
  controller.GoForward();
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), forward_params,
                                             &details));
  EXPECT_EQ(forward_params.url,
            controller.GetVisibleEntry()->GetURL());

  // Finally, navigate to an unrelated URL to make sure in_page is not sticky.
  const GURL url3("http://bar");
  params.page_id = 2;
  params.url = url3;
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_FALSE(details.is_in_page);
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetCurrentEntryIndex());
}

TEST_F(NavigationControllerTest, InPage_Replace) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Main page.
  const GURL url1("http://foo");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // First navigation.
  const GURL url2("http://foo#a");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;  // Same page_id
  params.url = url2;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url2);
  params.was_within_same_page = true;

  // This should NOT generate a new entry, nor prune the list.
  LoadCommittedDetails details;
  EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                             &details));
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_TRUE(details.is_in_page);
  EXPECT_TRUE(details.did_replace_entry);
  EXPECT_EQ(1, controller.GetEntryCount());
}

// Tests for http://crbug.com/40395
// Simulates this:
//   <script>
//     window.location.replace("#a");
//     window.location='http://foo3/';
//   </script>
TEST_F(NavigationControllerTest, ClientRedirectAfterInPageNavigation) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Load an initial page.
  {
    const GURL url("http://foo/");
    main_test_rfh()->SendNavigate(0, url);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
  }

  // Navigate to a new page.
  {
    const GURL url("http://foo2/");
    main_test_rfh()->SendNavigate(1, url);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
  }

  // Navigate within the page.
  {
    const GURL url("http://foo2/#a");
    FrameHostMsg_DidCommitProvisionalLoad_Params params;
    params.page_id = 1;  // Same page_id
    params.url = url;
    params.transition = ui::PAGE_TRANSITION_LINK;
    params.redirects.push_back(url);
    params.should_update_history = true;
    params.gesture = NavigationGestureUnknown;
    params.is_post = false;
    params.page_state = PageState::CreateFromURL(url);
    params.was_within_same_page = true;

    // This should NOT generate a new entry, nor prune the list.
    LoadCommittedDetails details;
    EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                               &details));
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    EXPECT_TRUE(details.is_in_page);
    EXPECT_TRUE(details.did_replace_entry);
    EXPECT_EQ(2, controller.GetEntryCount());
  }

  // Perform a client redirect to a new page.
  {
    const GURL url("http://foo3/");
    FrameHostMsg_DidCommitProvisionalLoad_Params params;
    params.page_id = 2;  // New page_id
    params.url = url;
    params.transition = ui::PAGE_TRANSITION_CLIENT_REDIRECT;
    params.redirects.push_back(GURL("http://foo2/#a"));
    params.redirects.push_back(url);
    params.should_update_history = true;
    params.gesture = NavigationGestureUnknown;
    params.is_post = false;
    params.page_state = PageState::CreateFromURL(url);

    // This SHOULD generate a new entry.
    LoadCommittedDetails details;
    EXPECT_TRUE(controller.RendererDidNavigate(main_test_rfh(), params,
                                               &details));
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    EXPECT_FALSE(details.is_in_page);
    EXPECT_EQ(3, controller.GetEntryCount());
  }

  // Verify that BACK brings us back to http://foo2/.
  {
    const GURL url("http://foo2/");
    controller.GoBack();
    main_test_rfh()->SendNavigate(1, url);
    EXPECT_EQ(1U, navigation_entry_committed_counter_);
    navigation_entry_committed_counter_ = 0;
    EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());
  }
}

TEST_F(NavigationControllerTest, PushStateWithoutPreviousEntry)
{
  ASSERT_FALSE(controller_impl().GetLastCommittedEntry());
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  GURL url("http://foo");
  params.page_id = 1;
  params.url = url;
  params.page_state = PageState::CreateFromURL(url);
  params.was_within_same_page = true;
  contents()->GetMainFrame()->SendNavigateWithParams(&params);
  // We pass if we don't crash.
}

// NotificationObserver implementation used in verifying we've received the
// NOTIFICATION_NAV_LIST_PRUNED method.
class PrunedListener : public NotificationObserver {
 public:
  explicit PrunedListener(NavigationControllerImpl* controller)
      : notification_count_(0) {
    registrar_.Add(this, NOTIFICATION_NAV_LIST_PRUNED,
                   Source<NavigationController>(controller));
  }

  void Observe(int type,
               const NotificationSource& source,
               const NotificationDetails& details) override {
    if (type == NOTIFICATION_NAV_LIST_PRUNED) {
      notification_count_++;
      details_ = *(Details<PrunedDetails>(details).ptr());
    }
  }

  // Number of times NAV_LIST_PRUNED has been observed.
  int notification_count_;

  // Details from the last NAV_LIST_PRUNED.
  PrunedDetails details_;

 private:
  NotificationRegistrar registrar_;

  DISALLOW_COPY_AND_ASSIGN(PrunedListener);
};

// Tests that we limit the number of navigation entries created correctly.
TEST_F(NavigationControllerTest, EnforceMaxNavigationCount) {
  NavigationControllerImpl& controller = controller_impl();
  size_t original_count = NavigationControllerImpl::max_entry_count();
  const int kMaxEntryCount = 5;

  NavigationControllerImpl::set_max_entry_count_for_testing(kMaxEntryCount);

  int url_index;
  // Load up to the max count, all entries should be there.
  for (url_index = 0; url_index < kMaxEntryCount; url_index++) {
    GURL url(base::StringPrintf("http://www.a.com/%d", url_index));
    controller.LoadURL(
        url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
    main_test_rfh()->SendNavigate(url_index, url);
  }

  EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);

  // Created a PrunedListener to observe prune notifications.
  PrunedListener listener(&controller);

  // Navigate some more.
  GURL url(base::StringPrintf("http://www.a.com/%d", url_index));
  controller.LoadURL(
      url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(url_index, url);
  url_index++;

  // We should have got a pruned navigation.
  EXPECT_EQ(1, listener.notification_count_);
  EXPECT_TRUE(listener.details_.from_front);
  EXPECT_EQ(1, listener.details_.count);

  // We expect http://www.a.com/0 to be gone.
  EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(),
            GURL("http:////www.a.com/1"));

  // More navigations.
  for (int i = 0; i < 3; i++) {
    url = GURL(base::StringPrintf("http:////www.a.com/%d", url_index));
    controller.LoadURL(
        url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
    main_test_rfh()->SendNavigate(url_index, url);
    url_index++;
  }
  EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(),
            GURL("http:////www.a.com/4"));

  NavigationControllerImpl::set_max_entry_count_for_testing(original_count);
}

// Tests that we can do a restore and navigate to the restored entries and
// everything is updated properly. This can be tricky since there is no
// SiteInstance for the entries created initially.
TEST_F(NavigationControllerTest, RestoreNavigate) {
  // Create a NavigationController with a restored set of tabs.
  GURL url("http://foo");
  std::vector<NavigationEntry*> entries;
  NavigationEntry* entry = NavigationControllerImpl::CreateNavigationEntry(
      url, Referrer(), ui::PAGE_TRANSITION_RELOAD, false, std::string(),
      browser_context());
  entry->SetPageID(0);
  entry->SetTitle(base::ASCIIToUTF16("Title"));
  entry->SetPageState(PageState::CreateFromEncodedData("state"));
  const base::Time timestamp = base::Time::Now();
  entry->SetTimestamp(timestamp);
  entries.push_back(entry);
  scoped_ptr<WebContentsImpl> our_contents(static_cast<WebContentsImpl*>(
      WebContents::Create(WebContents::CreateParams(browser_context()))));
  NavigationControllerImpl& our_controller = our_contents->GetController();
  our_controller.Restore(
      0,
      NavigationController::RESTORE_LAST_SESSION_EXITED_CLEANLY,
      &entries);
  ASSERT_EQ(0u, entries.size());

  // Before navigating to the restored entry, it should have a restore_type
  // and no SiteInstance.
  ASSERT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());
  EXPECT_FALSE(NavigationEntryImpl::FromNavigationEntry(
      our_controller.GetEntryAtIndex(0))->site_instance());

  // After navigating, we should have one entry, and it should be "pending".
  // It should now have a SiteInstance and no restore_type.
  our_controller.GoToIndex(0);
  EXPECT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(our_controller.GetEntryAtIndex(0),
            our_controller.GetPendingEntry());
  EXPECT_EQ(0, our_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_NONE,
            NavigationEntryImpl::FromNavigationEntry
                (our_controller.GetEntryAtIndex(0))->restore_type());
  EXPECT_TRUE(NavigationEntryImpl::FromNavigationEntry(
      our_controller.GetEntryAtIndex(0))->site_instance());

  // Timestamp should remain the same before the navigation finishes.
  EXPECT_EQ(timestamp, our_controller.GetEntryAtIndex(0)->GetTimestamp());

  // Say we navigated to that entry.
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url);
  LoadCommittedDetails details;
  our_controller.RendererDidNavigate(our_contents->GetMainFrame(), params,
                                     &details);

  // There should be no longer any pending entry and one committed one. This
  // means that we were able to locate the entry, assign its site instance, and
  // commit it properly.
  EXPECT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(0, our_controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(our_controller.GetPendingEntry());
  EXPECT_EQ(url,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetLastCommittedEntry())->site_instance()->
                    GetSiteURL());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_NONE,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());

  // Timestamp should have been updated.
  EXPECT_GE(our_controller.GetEntryAtIndex(0)->GetTimestamp(), timestamp);
}

// Tests that we can still navigate to a restored entry after a different
// navigation fails and clears the pending entry.  http://crbug.com/90085
TEST_F(NavigationControllerTest, RestoreNavigateAfterFailure) {
  // Create a NavigationController with a restored set of tabs.
  GURL url("http://foo");
  std::vector<NavigationEntry*> entries;
  NavigationEntry* entry = NavigationControllerImpl::CreateNavigationEntry(
      url, Referrer(), ui::PAGE_TRANSITION_RELOAD, false, std::string(),
      browser_context());
  entry->SetPageID(0);
  entry->SetTitle(base::ASCIIToUTF16("Title"));
  entry->SetPageState(PageState::CreateFromEncodedData("state"));
  entries.push_back(entry);
  scoped_ptr<WebContentsImpl> our_contents(static_cast<WebContentsImpl*>(
      WebContents::Create(WebContents::CreateParams(browser_context()))));
  NavigationControllerImpl& our_controller = our_contents->GetController();
  our_controller.Restore(
      0, NavigationController::RESTORE_LAST_SESSION_EXITED_CLEANLY, &entries);
  ASSERT_EQ(0u, entries.size());

  // Before navigating to the restored entry, it should have a restore_type
  // and no SiteInstance.
  EXPECT_EQ(NavigationEntryImpl::RESTORE_LAST_SESSION_EXITED_CLEANLY,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());
  EXPECT_FALSE(NavigationEntryImpl::FromNavigationEntry(
      our_controller.GetEntryAtIndex(0))->site_instance());

  // After navigating, we should have one entry, and it should be "pending".
  // It should now have a SiteInstance and no restore_type.
  our_controller.GoToIndex(0);
  EXPECT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(our_controller.GetEntryAtIndex(0),
            our_controller.GetPendingEntry());
  EXPECT_EQ(0, our_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_NONE,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());
  EXPECT_TRUE(NavigationEntryImpl::FromNavigationEntry(
      our_controller.GetEntryAtIndex(0))->site_instance());

  // This pending navigation may have caused a different navigation to fail,
  // which causes the pending entry to be cleared.
  FrameHostMsg_DidFailProvisionalLoadWithError_Params fail_load_params;
  fail_load_params.error_code = net::ERR_ABORTED;
  fail_load_params.error_description = base::string16();
  fail_load_params.url = url;
  fail_load_params.showing_repost_interstitial = false;
  main_test_rfh()->OnMessageReceived(
      FrameHostMsg_DidFailProvisionalLoadWithError(0,  // routing_id
                                                  fail_load_params));

  // Now the pending restored entry commits.
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = url;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.should_update_history = false;
  params.gesture = NavigationGestureUser;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url);
  LoadCommittedDetails details;
  our_controller.RendererDidNavigate(our_contents->GetMainFrame(), params,
                                     &details);

  // There should be no pending entry and one committed one.
  EXPECT_EQ(1, our_controller.GetEntryCount());
  EXPECT_EQ(0, our_controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(our_controller.GetPendingEntry());
  EXPECT_EQ(url,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetLastCommittedEntry())->site_instance()->
                    GetSiteURL());
  EXPECT_EQ(NavigationEntryImpl::RESTORE_NONE,
            NavigationEntryImpl::FromNavigationEntry(
                our_controller.GetEntryAtIndex(0))->restore_type());
}

// Make sure that the page type and stuff is correct after an interstitial.
TEST_F(NavigationControllerTest, Interstitial) {
  NavigationControllerImpl& controller = controller_impl();
  // First navigate somewhere normal.
  const GURL url1("http://foo");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url1);

  // Now navigate somewhere with an interstitial.
  const GURL url2("http://bar");
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
      set_page_type(PAGE_TYPE_INTERSTITIAL);

  // At this point the interstitial will be displayed and the load will still
  // be pending. If the user continues, the load will commit.
  main_test_rfh()->SendNavigate(1, url2);

  // The page should be a normal page again.
  EXPECT_EQ(url2, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(PAGE_TYPE_NORMAL,
            controller.GetLastCommittedEntry()->GetPageType());
}

TEST_F(NavigationControllerTest, RemoveEntry) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");
  const GURL url4("http://foo/4");
  const GURL url5("http://foo/5");
  const GURL pending_url("http://foo/pending");
  const GURL default_url("http://foo/default");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url1);
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(1, url2);
  controller.LoadURL(
      url3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(2, url3);
  controller.LoadURL(
      url4, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(3, url4);
  controller.LoadURL(
      url5, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(4, url5);

  // Try to remove the last entry.  Will fail because it is the current entry.
  EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
  EXPECT_EQ(5, controller.GetEntryCount());
  EXPECT_EQ(4, controller.GetLastCommittedEntryIndex());

  // Go back, but don't commit yet. Check that we can't delete the current
  // and pending entries.
  controller.GoBack();
  EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
  EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 2));

  // Now commit and delete the last entry.
  main_test_rfh()->SendNavigate(3, url4);
  EXPECT_TRUE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
  EXPECT_EQ(4, controller.GetEntryCount());
  EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());

  // Remove an entry which is not the last committed one.
  EXPECT_TRUE(controller.RemoveEntryAtIndex(0));
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());

  // Remove the 2 remaining entries.
  controller.RemoveEntryAtIndex(1);
  controller.RemoveEntryAtIndex(0);

  // This should leave us with only the last committed entry.
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
}

TEST_F(NavigationControllerTest, RemoveEntryWithPending) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");
  const GURL default_url("http://foo/default");

  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url1);
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(1, url2);
  controller.LoadURL(
      url3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(2, url3);

  // Go back, but don't commit yet. Check that we can't delete the current
  // and pending entries.
  controller.GoBack();
  EXPECT_FALSE(controller.RemoveEntryAtIndex(2));
  EXPECT_FALSE(controller.RemoveEntryAtIndex(1));

  // Remove the first entry, while there is a pending entry.  This is expected
  // to discard the pending entry.
  EXPECT_TRUE(controller.RemoveEntryAtIndex(0));
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());

  // We should update the last committed entry index.
  EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());

  // Now commit and ensure we land on the right entry.
  main_test_rfh()->SendNavigate(1, url2);
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
}

// Tests the transient entry, making sure it goes away with all navigations.
TEST_F(NavigationControllerTest, TransientEntry) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url0("http://foo/0");
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");
  const GURL url3_ref("http://foo/3#bar");
  const GURL url4("http://foo/4");
  const GURL transient_url("http://foo/transient");

  controller.LoadURL(
      url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url0);
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(1, url1);

  notifications.Reset();

  // Adding a transient with no pending entry.
  NavigationEntryImpl* transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);

  // We should not have received any notifications.
  EXPECT_EQ(0U, notifications.size());

  // Check our state.
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 3);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
  EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
  EXPECT_TRUE(controller.GetLastCommittedEntry());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(contents()->GetMaxPageID(), 1);

  // Navigate.
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(2, url2);

  // We should have navigated, transient entry should be gone.
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 3);

  // Add a transient again, then navigate with no pending entry this time.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->SendNavigate(3, url3);
  // Transient entry should be gone.
  EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 4);

  // Initiate a navigation, add a transient then commit navigation.
  controller.LoadURL(
      url4, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->SendNavigate(4, url4);
  EXPECT_EQ(url4, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 5);

  // Add a transient and go back.  This should simply remove the transient.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  EXPECT_TRUE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  controller.GoBack();
  // Transient entry should be gone.
  EXPECT_EQ(url4, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(controller.GetEntryCount(), 5);
  main_test_rfh()->SendNavigate(3, url3);

  // Add a transient and go to an entry before the current one.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  controller.GoToIndex(1);
  // The navigation should have been initiated, transient entry should be gone.
  EXPECT_FALSE(controller.GetTransientEntry());
  EXPECT_EQ(url1, controller.GetPendingEntry()->GetURL());
  // Visible entry does not update for history navigations until commit.
  EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->SendNavigate(1, url1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  // Add a transient and go to an entry after the current one.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  controller.GoToIndex(3);
  // The navigation should have been initiated, transient entry should be gone.
  // Because of the transient entry that is removed, going to index 3 makes us
  // land on url2 (which is visible after the commit).
  EXPECT_EQ(url2, controller.GetPendingEntry()->GetURL());
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->SendNavigate(2, url2);
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());

  // Add a transient and go forward.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  EXPECT_TRUE(controller.CanGoForward());
  controller.GoForward();
  // We should have navigated, transient entry should be gone.
  EXPECT_FALSE(controller.GetTransientEntry());
  EXPECT_EQ(url3, controller.GetPendingEntry()->GetURL());
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->SendNavigate(3, url3);
  EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());

  // Add a transient and do an in-page navigation, replacing the current entry.
  transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->SendNavigate(3, url3_ref);
  // Transient entry should be gone.
  EXPECT_FALSE(controller.GetTransientEntry());
  EXPECT_EQ(url3_ref, controller.GetVisibleEntry()->GetURL());

  // Ensure the URLs are correct.
  EXPECT_EQ(controller.GetEntryCount(), 5);
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url0);
  EXPECT_EQ(controller.GetEntryAtIndex(1)->GetURL(), url1);
  EXPECT_EQ(controller.GetEntryAtIndex(2)->GetURL(), url2);
  EXPECT_EQ(controller.GetEntryAtIndex(3)->GetURL(), url3_ref);
  EXPECT_EQ(controller.GetEntryAtIndex(4)->GetURL(), url4);
}

// Test that Reload initiates a new navigation to a transient entry's URL.
TEST_F(NavigationControllerTest, ReloadTransient) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url0("http://foo/0");
  const GURL url1("http://foo/1");
  const GURL transient_url("http://foo/transient");

  // Load |url0|, and start a pending navigation to |url1|.
  controller.LoadURL(
      url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  main_test_rfh()->SendNavigate(0, url0);
  controller.LoadURL(
      url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // A transient entry is added, interrupting the navigation.
  NavigationEntryImpl* transient_entry = new NavigationEntryImpl;
  transient_entry->SetURL(transient_url);
  controller.SetTransientEntry(transient_entry);
  EXPECT_TRUE(controller.GetTransientEntry());
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());

  // The page is reloaded, which should remove the pending entry for |url1| and
  // the transient entry for |transient_url|, and start a navigation to
  // |transient_url|.
  controller.Reload(true);
  EXPECT_FALSE(controller.GetTransientEntry());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
  ASSERT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url0);

  // Load of |transient_url| completes.
  main_test_rfh()->SendNavigate(1, transient_url);
  ASSERT_EQ(controller.GetEntryCount(), 2);
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url0);
  EXPECT_EQ(controller.GetEntryAtIndex(1)->GetURL(), transient_url);
}

// Ensure that renderer initiated pending entries get replaced, so that we
// don't show a stale virtual URL when a navigation commits.
// See http://crbug.com/266922.
TEST_F(NavigationControllerTest, RendererInitiatedPendingEntries) {
  NavigationControllerImpl& controller = controller_impl();
  Navigator* navigator =
      contents()->GetFrameTree()->root()->navigator();

  const GURL url1("nonexistent:12121");
  const GURL url1_fixed("http://nonexistent:12121/");
  const GURL url2("http://foo");

  // We create pending entries for renderer-initiated navigations so that we
  // can show them in new tabs when it is safe.
  navigator->DidStartProvisionalLoad(main_test_rfh(), url1, false);

  // Simulate what happens if a BrowserURLHandler rewrites the URL, causing
  // the virtual URL to differ from the URL.
  controller.GetPendingEntry()->SetURL(url1_fixed);
  controller.GetPendingEntry()->SetVirtualURL(url1);

  EXPECT_EQ(url1_fixed, controller.GetPendingEntry()->GetURL());
  EXPECT_EQ(url1, controller.GetPendingEntry()->GetVirtualURL());
  EXPECT_TRUE(
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
          is_renderer_initiated());

  // If the user clicks another link, we should replace the pending entry.
  navigator->DidStartProvisionalLoad(main_test_rfh(), url2, false);
  EXPECT_EQ(url2, controller.GetPendingEntry()->GetURL());
  EXPECT_EQ(url2, controller.GetPendingEntry()->GetVirtualURL());

  // Once it commits, the URL and virtual URL should reflect the actual page.
  main_test_rfh()->SendNavigate(0, url2);
  EXPECT_EQ(url2, controller.GetLastCommittedEntry()->GetURL());
  EXPECT_EQ(url2, controller.GetLastCommittedEntry()->GetVirtualURL());

  // We should not replace the pending entry for an error URL.
  navigator->DidStartProvisionalLoad(main_test_rfh(), url1, false);
  EXPECT_EQ(url1, controller.GetPendingEntry()->GetURL());
  navigator->DidStartProvisionalLoad(main_test_rfh(),
                                     GURL(kUnreachableWebDataURL), false);
  EXPECT_EQ(url1, controller.GetPendingEntry()->GetURL());

  // We should remember if the pending entry will replace the current one.
  // http://crbug.com/308444.
  navigator->DidStartProvisionalLoad(main_test_rfh(), url1, false);
  NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
      set_should_replace_entry(true);
  navigator->DidStartProvisionalLoad(main_test_rfh(), url2, false);
  EXPECT_TRUE(
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
          should_replace_entry());
  // TODO(nasko): Until OnNavigate is moved to RenderFrameHost, we need
  // to go through the RenderViewHost. The TestRenderViewHost routes navigations
  // to the main frame.
  main_test_rfh()->SendNavigate(0, url2);
  EXPECT_EQ(url2, controller.GetLastCommittedEntry()->GetURL());
}

// Tests that the URLs for renderer-initiated navigations are not displayed to
// the user until the navigation commits, to prevent URL spoof attacks.
// See http://crbug.com/99016.
TEST_F(NavigationControllerTest, DontShowRendererURLUntilCommit) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url0("http://foo/0");
  const GURL url1("http://foo/1");

  // For typed navigations (browser-initiated), both pending and visible entries
  // should update before commit.
  controller.LoadURL(
      url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_EQ(url0, controller.GetPendingEntry()->GetURL());
  EXPECT_EQ(url0, controller.GetVisibleEntry()->GetURL());
  main_test_rfh()->SendNavigate(0, url0);

  // For link clicks (renderer-initiated navigations), the pending entry should
  // update before commit but the visible should not.
  NavigationController::LoadURLParams load_url_params(url1);
  load_url_params.is_renderer_initiated = true;
  controller.LoadURLWithParams(load_url_params);
  EXPECT_EQ(url0, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(url1, controller.GetPendingEntry()->GetURL());
  EXPECT_TRUE(
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
          is_renderer_initiated());

  // After commit, both visible should be updated, there should be no pending
  // entry, and we should no longer treat the entry as renderer-initiated.
  main_test_rfh()->SendNavigate(1, url1);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_FALSE(
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetLastCommittedEntry())->is_renderer_initiated());

  notifications.Reset();
}

// Tests that the URLs for renderer-initiated navigations in new tabs are
// displayed to the user before commit, as long as the initial about:blank
// page has not been modified.  If so, we must revert to showing about:blank.
// See http://crbug.com/9682.
TEST_F(NavigationControllerTest, ShowRendererURLInNewTabUntilModified) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url("http://foo");

  // For renderer-initiated navigations in new tabs (with no committed entries),
  // we show the pending entry's URL as long as the about:blank page is not
  // modified.
  NavigationController::LoadURLParams load_url_params(url);
  load_url_params.transition_type = ui::PAGE_TRANSITION_LINK;
  load_url_params.is_renderer_initiated = true;
  controller.LoadURLWithParams(load_url_params);
  EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(url, controller.GetPendingEntry()->GetURL());
  EXPECT_TRUE(
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
          is_renderer_initiated());
  EXPECT_TRUE(controller.IsInitialNavigation());
  EXPECT_FALSE(contents()->HasAccessedInitialDocument());

  // There should be no title yet.
  EXPECT_TRUE(contents()->GetTitle().empty());

  // If something else modifies the contents of the about:blank page, then
  // we must revert to showing about:blank to avoid a URL spoof.
  main_test_rfh()->OnMessageReceived(FrameHostMsg_DidAccessInitialDocument(0));
  EXPECT_TRUE(contents()->HasAccessedInitialDocument());
  EXPECT_FALSE(controller.GetVisibleEntry());
  EXPECT_EQ(url, controller.GetPendingEntry()->GetURL());

  notifications.Reset();
}

// Tests that the URLs for browser-initiated navigations in new tabs are
// displayed to the user even after they fail, as long as the initial
// about:blank page has not been modified.  If so, we must revert to showing
// about:blank. See http://crbug.com/355537.
TEST_F(NavigationControllerTest, ShowBrowserURLAfterFailUntilModified) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url("http://foo");

  // For browser-initiated navigations in new tabs (with no committed entries),
  // we show the pending entry's URL as long as the about:blank page is not
  // modified.  This is possible in cases that the user types a URL into a popup
  // tab created with a slow URL.
  NavigationController::LoadURLParams load_url_params(url);
  load_url_params.transition_type = ui::PAGE_TRANSITION_TYPED;
  load_url_params.is_renderer_initiated = false;
  controller.LoadURLWithParams(load_url_params);
  EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(url, controller.GetPendingEntry()->GetURL());
  EXPECT_FALSE(
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
          is_renderer_initiated());
  EXPECT_TRUE(controller.IsInitialNavigation());
  EXPECT_FALSE(contents()->HasAccessedInitialDocument());

  // There should be no title yet.
  EXPECT_TRUE(contents()->GetTitle().empty());

  // Suppose it aborts before committing, if it's a 204 or download or due to a
  // stop or a new navigation from the user.  The URL should remain visible.
  FrameHostMsg_DidFailProvisionalLoadWithError_Params params;
  params.error_code = net::ERR_ABORTED;
  params.error_description = base::string16();
  params.url = url;
  params.showing_repost_interstitial = false;
  main_test_rfh()->OnMessageReceived(
      FrameHostMsg_DidFailProvisionalLoadWithError(0, params));
  contents()->SetIsLoading(test_rvh(), false, true, NULL);
  EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());

  // If something else later modifies the contents of the about:blank page, then
  // we must revert to showing about:blank to avoid a URL spoof.
  main_test_rfh()->OnMessageReceived(FrameHostMsg_DidAccessInitialDocument(0));
  EXPECT_TRUE(contents()->HasAccessedInitialDocument());
  EXPECT_FALSE(controller.GetVisibleEntry());
  EXPECT_FALSE(controller.GetPendingEntry());

  notifications.Reset();
}

// Tests that the URLs for renderer-initiated navigations in new tabs are
// displayed to the user even after they fail, as long as the initial
// about:blank page has not been modified.  If so, we must revert to showing
// about:blank. See http://crbug.com/355537.
TEST_F(NavigationControllerTest, ShowRendererURLAfterFailUntilModified) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url("http://foo");

  // For renderer-initiated navigations in new tabs (with no committed entries),
  // we show the pending entry's URL as long as the about:blank page is not
  // modified.
  NavigationController::LoadURLParams load_url_params(url);
  load_url_params.transition_type = ui::PAGE_TRANSITION_LINK;
  load_url_params.is_renderer_initiated = true;
  controller.LoadURLWithParams(load_url_params);
  EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());
  EXPECT_EQ(url, controller.GetPendingEntry()->GetURL());
  EXPECT_TRUE(
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
          is_renderer_initiated());
  EXPECT_TRUE(controller.IsInitialNavigation());
  EXPECT_FALSE(contents()->HasAccessedInitialDocument());

  // There should be no title yet.
  EXPECT_TRUE(contents()->GetTitle().empty());

  // Suppose it aborts before committing, if it's a 204 or download or due to a
  // stop or a new navigation from the user.  The URL should remain visible.
  FrameHostMsg_DidFailProvisionalLoadWithError_Params params;
  params.error_code = net::ERR_ABORTED;
  params.error_description = base::string16();
  params.url = url;
  params.showing_repost_interstitial = false;
  main_test_rfh()->OnMessageReceived(
      FrameHostMsg_DidFailProvisionalLoadWithError(0, params));
  EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());

  // If something else later modifies the contents of the about:blank page, then
  // we must revert to showing about:blank to avoid a URL spoof.
  main_test_rfh()->OnMessageReceived(FrameHostMsg_DidAccessInitialDocument(0));
  EXPECT_TRUE(contents()->HasAccessedInitialDocument());
  EXPECT_FALSE(controller.GetVisibleEntry());
  EXPECT_EQ(url, controller.GetPendingEntry()->GetURL());

  notifications.Reset();
}

TEST_F(NavigationControllerTest, DontShowRendererURLInNewTabAfterCommit) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  const GURL url1("http://foo/eh");
  const GURL url2("http://foo/bee");

  // For renderer-initiated navigations in new tabs (with no committed entries),
  // we show the pending entry's URL as long as the about:blank page is not
  // modified.
  NavigationController::LoadURLParams load_url_params(url1);
  load_url_params.transition_type = ui::PAGE_TRANSITION_LINK;
  load_url_params.is_renderer_initiated = true;
  controller.LoadURLWithParams(load_url_params);
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());
  EXPECT_TRUE(
      NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
          is_renderer_initiated());
  EXPECT_TRUE(controller.IsInitialNavigation());
  EXPECT_FALSE(contents()->HasAccessedInitialDocument());

  // Simulate a commit and then starting a new pending navigation.
  main_test_rfh()->SendNavigate(0, url1);
  NavigationController::LoadURLParams load_url2_params(url2);
  load_url2_params.transition_type = ui::PAGE_TRANSITION_LINK;
  load_url2_params.is_renderer_initiated = true;
  controller.LoadURLWithParams(load_url2_params);

  // We should not consider this an initial navigation, and thus should
  // not show the pending URL.
  EXPECT_FALSE(contents()->HasAccessedInitialDocument());
  EXPECT_FALSE(controller.IsInitialNavigation());
  EXPECT_TRUE(controller.GetVisibleEntry());
  EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());

  notifications.Reset();
}

// Tests that IsInPageNavigation returns appropriate results.  Prevents
// regression for bug 1126349.
TEST_F(NavigationControllerTest, IsInPageNavigation) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url("http://www.google.com/home.html");

  // If the renderer claims it performed an in-page navigation from
  // about:blank, trust the renderer.
  // This can happen when an iframe is created and populated via
  // document.write(), then tries to perform a fragment navigation.
  // TODO(japhet): We should only trust the renderer if the about:blank
  // was the first document in the given frame, but we don't have enough
  // information to identify that case currently.
  const GURL blank_url(url::kAboutBlankURL);
  main_test_rfh()->SendNavigate(0, blank_url);
  EXPECT_TRUE(controller.IsURLInPageNavigation(url, true,
      main_test_rfh()));

  // Navigate to URL with no refs.
  main_test_rfh()->SendNavigate(0, url);

  // Reloading the page is not an in-page navigation.
  EXPECT_FALSE(controller.IsURLInPageNavigation(url, false,
      main_test_rfh()));
  const GURL other_url("http://www.google.com/add.html");
  EXPECT_FALSE(controller.IsURLInPageNavigation(other_url, false,
      main_test_rfh()));
  const GURL url_with_ref("http://www.google.com/home.html#my_ref");
  EXPECT_TRUE(controller.IsURLInPageNavigation(url_with_ref, true,
      main_test_rfh()));

  // Navigate to URL with refs.
  main_test_rfh()->SendNavigate(1, url_with_ref);

  // Reloading the page is not an in-page navigation.
  EXPECT_FALSE(controller.IsURLInPageNavigation(url_with_ref, false,
      main_test_rfh()));
  EXPECT_FALSE(controller.IsURLInPageNavigation(url, false,
      main_test_rfh()));
  EXPECT_FALSE(controller.IsURLInPageNavigation(other_url, false,
      main_test_rfh()));
  const GURL other_url_with_ref("http://www.google.com/home.html#my_other_ref");
  EXPECT_TRUE(controller.IsURLInPageNavigation(other_url_with_ref, true,
      main_test_rfh()));

  // Going to the same url again will be considered in-page
  // if the renderer says it is even if the navigation type isn't IN_PAGE.
  EXPECT_TRUE(controller.IsURLInPageNavigation(url_with_ref, true,
      main_test_rfh()));

  // Going back to the non ref url will be considered in-page if the navigation
  // type is IN_PAGE.
  EXPECT_TRUE(controller.IsURLInPageNavigation(url, true,
      main_test_rfh()));

  // If the renderer says this is a same-origin in-page navigation, believe it.
  // This is the pushState/replaceState case.
  EXPECT_TRUE(controller.IsURLInPageNavigation(other_url, true,
      main_test_rfh()));

  // Test allow_universal_access_from_file_urls flag.
  const GURL different_origin_url("http://www.example.com");
  MockRenderProcessHost* rph =
      static_cast<MockRenderProcessHost*>(main_test_rfh()->GetProcess());
  WebPreferences prefs = test_rvh()->GetWebkitPreferences();
  prefs.allow_universal_access_from_file_urls = true;
  test_rvh()->UpdateWebkitPreferences(prefs);
  prefs = test_rvh()->GetWebkitPreferences();
  EXPECT_TRUE(prefs.allow_universal_access_from_file_urls);
  // Allow in page navigation if existing URL is file scheme.
  const GURL file_url("file:///foo/index.html");
  main_test_rfh()->SendNavigate(0, file_url);
  EXPECT_EQ(0, rph->bad_msg_count());
  EXPECT_TRUE(controller.IsURLInPageNavigation(different_origin_url, true,
      main_test_rfh()));
  EXPECT_EQ(0, rph->bad_msg_count());
  // Don't honor allow_universal_access_from_file_urls if existing URL is
  // not file scheme.
  main_test_rfh()->SendNavigate(0, url);
  EXPECT_FALSE(controller.IsURLInPageNavigation(different_origin_url, true,
      main_test_rfh()));
  EXPECT_EQ(1, rph->bad_msg_count());

  // Remove allow_universal_access_from_file_urls flag.
  prefs.allow_universal_access_from_file_urls = false;
  test_rvh()->UpdateWebkitPreferences(prefs);
  prefs = test_rvh()->GetWebkitPreferences();
  EXPECT_FALSE(prefs.allow_universal_access_from_file_urls);

  // Don't believe the renderer if it claims a cross-origin navigation is
  // in-page.
  EXPECT_EQ(1, rph->bad_msg_count());
  EXPECT_FALSE(controller.IsURLInPageNavigation(different_origin_url, true,
      main_test_rfh()));
  EXPECT_EQ(2, rph->bad_msg_count());
}

// Some pages can have subframes with the same base URL (minus the reference) as
// the main page. Even though this is hard, it can happen, and we don't want
// these subframe navigations to affect the toplevel document. They should
// instead be ignored.  http://crbug.com/5585
TEST_F(NavigationControllerTest, SameSubframe) {
  NavigationControllerImpl& controller = controller_impl();
  // Navigate the main frame.
  const GURL url("http://www.google.com/");
  main_test_rfh()->SendNavigate(0, url);

  // We should be at the first navigation entry.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);

  // Navigate a subframe that would normally count as in-page.
  const GURL subframe("http://www.google.com/#");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 0;
  params.url = subframe;
  params.transition = ui::PAGE_TRANSITION_AUTO_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(subframe);
  LoadCommittedDetails details;
  EXPECT_FALSE(controller.RendererDidNavigate(main_test_rfh(), params,
                                              &details));

  // Nothing should have changed.
  EXPECT_EQ(controller.GetEntryCount(), 1);
  EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
}

// Make sure that on cloning a WebContentsImpl and going back needs_reload is
// false.
TEST_F(NavigationControllerTest, CloneAndGoBack) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const base::string16 title(base::ASCIIToUTF16("Title"));

  NavigateAndCommit(url1);
  controller.GetVisibleEntry()->SetTitle(title);
  NavigateAndCommit(url2);

  scoped_ptr<WebContents> clone(controller.GetWebContents()->Clone());

  ASSERT_EQ(2, clone->GetController().GetEntryCount());
  EXPECT_TRUE(clone->GetController().NeedsReload());
  clone->GetController().GoBack();
  // Navigating back should have triggered needs_reload_ to go false.
  EXPECT_FALSE(clone->GetController().NeedsReload());

  // Ensure that the pending URL and its title are visible.
  EXPECT_EQ(url1, clone->GetController().GetVisibleEntry()->GetURL());
  EXPECT_EQ(title, clone->GetTitle());
}

// Make sure that reloading a cloned tab doesn't change its pending entry index.
// See http://crbug.com/234491.
TEST_F(NavigationControllerTest, CloneAndReload) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const base::string16 title(base::ASCIIToUTF16("Title"));

  NavigateAndCommit(url1);
  controller.GetVisibleEntry()->SetTitle(title);
  NavigateAndCommit(url2);

  scoped_ptr<WebContents> clone(controller.GetWebContents()->Clone());
  clone->GetController().LoadIfNecessary();

  ASSERT_EQ(2, clone->GetController().GetEntryCount());
  EXPECT_EQ(1, clone->GetController().GetPendingEntryIndex());

  clone->GetController().Reload(true);
  EXPECT_EQ(1, clone->GetController().GetPendingEntryIndex());
}

// Make sure that cloning a WebContentsImpl doesn't copy interstitials.
TEST_F(NavigationControllerTest, CloneOmitsInterstitials) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);

  // Add an interstitial entry.  Should be deleted with controller.
  NavigationEntryImpl* interstitial_entry = new NavigationEntryImpl();
  interstitial_entry->set_page_type(PAGE_TYPE_INTERSTITIAL);
  controller.SetTransientEntry(interstitial_entry);

  scoped_ptr<WebContents> clone(controller.GetWebContents()->Clone());

  ASSERT_EQ(2, clone->GetController().GetEntryCount());
}

// Test requesting and triggering a lazy reload.
TEST_F(NavigationControllerTest, LazyReload) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url("http://foo");
  NavigateAndCommit(url);
  ASSERT_FALSE(controller.NeedsReload());
  EXPECT_NE(ui::PAGE_TRANSITION_RELOAD,
            controller.GetLastCommittedEntry()->GetTransitionType());

  // Request a reload to happen when the controller becomes active (e.g. after
  // the renderer gets killed in background on Android).
  controller.SetNeedsReload();
  ASSERT_TRUE(controller.NeedsReload());
  EXPECT_EQ(ui::PAGE_TRANSITION_RELOAD,
            controller.GetLastCommittedEntry()->GetTransitionType());

  // Set the controller as active, triggering the requested reload.
  controller.SetActive(true);
  ASSERT_FALSE(controller.NeedsReload());
  EXPECT_EQ(ui::PAGE_TRANSITION_RELOAD,
            controller.GetPendingEntry()->GetTransitionType());
}

// Test requesting and triggering a lazy reload without any committed entry.
TEST_F(NavigationControllerTest, LazyReloadWithoutCommittedEntry) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url("http://foo");
  controller.LoadURL(url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  ASSERT_FALSE(controller.NeedsReload());
  EXPECT_EQ(ui::PAGE_TRANSITION_TYPED,
            controller.GetPendingEntry()->GetTransitionType());

  // Request a reload to happen when the controller becomes active (e.g. after
  // the renderer gets killed in background on Android).
  controller.SetNeedsReload();
  ASSERT_TRUE(controller.NeedsReload());
  EXPECT_EQ(ui::PAGE_TRANSITION_TYPED,
            controller.GetPendingEntry()->GetTransitionType());

  // Set the controller as active, triggering the requested reload.
  controller.SetActive(true);
  ASSERT_FALSE(controller.NeedsReload());
  EXPECT_EQ(ui::PAGE_TRANSITION_TYPED,
            controller.GetPendingEntry()->GetTransitionType());
}

// Tests a subframe navigation while a toplevel navigation is pending.
// http://crbug.com/43967
TEST_F(NavigationControllerTest, SubframeWhilePending) {
  NavigationControllerImpl& controller = controller_impl();
  // Load the first page.
  const GURL url1("http://foo/");
  NavigateAndCommit(url1);

  // Now start a pending load to a totally different page, but don't commit it.
  const GURL url2("http://bar/");
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());

  // Send a subframe update from the first page, as if one had just
  // automatically loaded. Auto subframes don't increment the page ID.
  const GURL url1_sub("http://foo/subframe");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = controller.GetLastCommittedEntry()->GetPageID();
  params.url = url1_sub;
  params.transition = ui::PAGE_TRANSITION_AUTO_SUBFRAME;
  params.should_update_history = false;
  params.gesture = NavigationGestureAuto;
  params.is_post = false;
  params.page_state = PageState::CreateFromURL(url1_sub);
  LoadCommittedDetails details;

  // This should return false meaning that nothing was actually updated.
  EXPECT_FALSE(controller.RendererDidNavigate(main_test_rfh(), params,
                                              &details));

  // The notification should have updated the last committed one, and not
  // the pending load.
  EXPECT_EQ(url1, controller.GetLastCommittedEntry()->GetURL());

  // The active entry should be unchanged by the subframe load.
  EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
}

// Test CopyStateFrom with 2 urls, the first selected and nothing in the target.
TEST_F(NavigationControllerTest, CopyStateFrom) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  controller.GoBack();
  contents()->CommitPendingNavigation();

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_controller.CopyStateFrom(controller);

  // other_controller should now contain 2 urls.
  ASSERT_EQ(2, other_controller.GetEntryCount());
  // We should be looking at the first one.
  ASSERT_EQ(0, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(url2, other_controller.GetEntryAtIndex(1)->GetURL());
  // This is a different site than url1, so the IDs start again at 0.
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(1)->GetPageID());

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(0));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance1));

  // Ensure the SessionStorageNamespaceMaps are the same size and have
  // the same partitons loaded.
  //
  // TODO(ajwong): We should load a url from a different partition earlier
  // to make sure this map has more than one entry.
  const SessionStorageNamespaceMap& session_storage_namespace_map =
      controller.GetSessionStorageNamespaceMap();
  const SessionStorageNamespaceMap& other_session_storage_namespace_map =
      other_controller.GetSessionStorageNamespaceMap();
  EXPECT_EQ(session_storage_namespace_map.size(),
            other_session_storage_namespace_map.size());
  for (SessionStorageNamespaceMap::const_iterator it =
           session_storage_namespace_map.begin();
       it != session_storage_namespace_map.end();
       ++it) {
    SessionStorageNamespaceMap::const_iterator other =
        other_session_storage_namespace_map.find(it->first);
    EXPECT_TRUE(other != other_session_storage_namespace_map.end());
  }
}

// Tests CopyStateFromAndPrune with 2 urls in source, 1 in dest.
TEST_F(NavigationControllerTest, CopyStateFromAndPrune) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);

  // First two entries should have the same SiteInstance.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(controller.GetEntryAtIndex(0));
  SiteInstance* instance2 =
      GetSiteInstanceFromEntry(controller.GetEntryAtIndex(1));
  EXPECT_EQ(instance1, instance2);
  EXPECT_EQ(0, controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(1, controller.GetEntryAtIndex(1)->GetPageID());
  EXPECT_EQ(1, contents()->GetMaxPageIDForSiteInstance(instance1));

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url3);
  other_contents->ExpectSetHistoryOffsetAndLength(2, 3);
  other_controller.CopyStateFromAndPrune(&controller, false);

  // other_controller should now contain the 3 urls: url1, url2 and url3.

  ASSERT_EQ(3, other_controller.GetEntryCount());

  ASSERT_EQ(2, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url2, other_controller.GetEntryAtIndex(1)->GetURL());
  EXPECT_EQ(url3, other_controller.GetEntryAtIndex(2)->GetURL());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(1, other_controller.GetEntryAtIndex(1)->GetPageID());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(2)->GetPageID());

  // A new SiteInstance in a different BrowsingInstance should be used for the
  // new tab.
  SiteInstance* instance3 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(2));
  EXPECT_NE(instance3, instance1);
  EXPECT_FALSE(instance3->IsRelatedSiteInstance(instance1));

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  EXPECT_EQ(1, other_contents->GetMaxPageIDForSiteInstance(instance1));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance3));
}

// Test CopyStateFromAndPrune with 2 urls, the first selected and 1 entry in
// the target.
TEST_F(NavigationControllerTest, CopyStateFromAndPrune2) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const GURL url3("http://foo3");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  controller.GoBack();
  contents()->CommitPendingNavigation();

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url3);
  other_contents->ExpectSetHistoryOffsetAndLength(1, 2);
  other_controller.CopyStateFromAndPrune(&controller, false);

  // other_controller should now contain: url1, url3

  ASSERT_EQ(2, other_controller.GetEntryCount());
  ASSERT_EQ(1, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url3, other_controller.GetEntryAtIndex(1)->GetURL());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(1)->GetPageID());

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(1));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance1));
}

// Test CopyStateFromAndPrune with 2 urls, the last selected and 2 entries in
// the target.
TEST_F(NavigationControllerTest, CopyStateFromAndPrune3) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const GURL url3("http://foo3");
  const GURL url4("http://foo4");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url3);
  other_contents->NavigateAndCommit(url4);
  other_contents->ExpectSetHistoryOffsetAndLength(2, 3);
  other_controller.CopyStateFromAndPrune(&controller, false);

  // other_controller should now contain: url1, url2, url4

  ASSERT_EQ(3, other_controller.GetEntryCount());
  ASSERT_EQ(2, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url2, other_controller.GetEntryAtIndex(1)->GetURL());
  EXPECT_EQ(url4, other_controller.GetEntryAtIndex(2)->GetURL());

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(2));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance1));
}

// Test CopyStateFromAndPrune with 2 urls, 2 entries in the target, with
// not the last entry selected in the target.
TEST_F(NavigationControllerTest, CopyStateFromAndPruneNotLast) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const GURL url3("http://foo3");
  const GURL url4("http://foo4");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url3);
  other_contents->NavigateAndCommit(url4);
  other_controller.GoBack();
  other_contents->CommitPendingNavigation();
  other_contents->ExpectSetHistoryOffsetAndLength(2, 3);
  other_controller.CopyStateFromAndPrune(&controller, false);

  // other_controller should now contain: url1, url2, url3

  ASSERT_EQ(3, other_controller.GetEntryCount());
  ASSERT_EQ(2, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url2, other_controller.GetEntryAtIndex(1)->GetURL());
  EXPECT_EQ(url3, other_controller.GetEntryAtIndex(2)->GetURL());

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(2));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance1));
}

// Test CopyStateFromAndPrune with 2 urls, the first selected and 1 entry plus
// a pending entry in the target.
TEST_F(NavigationControllerTest, CopyStateFromAndPruneTargetPending) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const GURL url3("http://foo3");
  const GURL url4("http://foo4");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  controller.GoBack();
  contents()->CommitPendingNavigation();

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url3);
  other_controller.LoadURL(
      url4, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  other_contents->ExpectSetHistoryOffsetAndLength(1, 2);
  other_controller.CopyStateFromAndPrune(&controller, false);

  // other_controller should now contain url1, url3, and a pending entry
  // for url4.

  ASSERT_EQ(2, other_controller.GetEntryCount());
  EXPECT_EQ(1, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url3, other_controller.GetEntryAtIndex(1)->GetURL());

  // And there should be a pending entry for url4.
  ASSERT_TRUE(other_controller.GetPendingEntry());
  EXPECT_EQ(url4, other_controller.GetPendingEntry()->GetURL());

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(0));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance1));
}

// Test CopyStateFromAndPrune with 1 url in the source, 1 entry and a pending
// client redirect entry (with the same page ID) in the target.  This used to
// crash because the last committed entry would be pruned but max_page_id
// remembered the page ID (http://crbug.com/234809).
TEST_F(NavigationControllerTest, CopyStateFromAndPruneTargetPending2) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2a("http://foo2/a");
  const GURL url2b("http://foo2/b");

  NavigateAndCommit(url1);

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url2a);
  // Simulate a client redirect, which has the same page ID as entry 2a.
  other_controller.LoadURL(
      url2b, Referrer(), ui::PAGE_TRANSITION_LINK, std::string());
  other_controller.GetPendingEntry()->SetPageID(
      other_controller.GetLastCommittedEntry()->GetPageID());

  other_contents->ExpectSetHistoryOffsetAndLength(1, 2);
  other_controller.CopyStateFromAndPrune(&controller, false);

  // other_controller should now contain url1, url2a, and a pending entry
  // for url2b.

  ASSERT_EQ(2, other_controller.GetEntryCount());
  EXPECT_EQ(1, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url2a, other_controller.GetEntryAtIndex(1)->GetURL());

  // And there should be a pending entry for url4.
  ASSERT_TRUE(other_controller.GetPendingEntry());
  EXPECT_EQ(url2b, other_controller.GetPendingEntry()->GetURL());

  // Let the pending entry commit.
  other_contents->CommitPendingNavigation();

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(1));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance1));
}

// Test CopyStateFromAndPrune with 2 urls, a back navigation pending in the
// source, and 1 entry in the target. The back pending entry should be ignored.
TEST_F(NavigationControllerTest, CopyStateFromAndPruneSourcePending) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const GURL url3("http://foo3");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  controller.GoBack();

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url3);
  other_contents->ExpectSetHistoryOffsetAndLength(2, 3);
  other_controller.CopyStateFromAndPrune(&controller, false);

  // other_controller should now contain: url1, url2, url3

  ASSERT_EQ(3, other_controller.GetEntryCount());
  ASSERT_EQ(2, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url2, other_controller.GetEntryAtIndex(1)->GetURL());
  EXPECT_EQ(url3, other_controller.GetEntryAtIndex(2)->GetURL());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(2)->GetPageID());

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(2));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance1));
}

// Tests CopyStateFromAndPrune with 3 urls in source, 1 in dest,
// when the max entry count is 3.  We should prune one entry.
TEST_F(NavigationControllerTest, CopyStateFromAndPruneMaxEntries) {
  NavigationControllerImpl& controller = controller_impl();
  size_t original_count = NavigationControllerImpl::max_entry_count();
  const int kMaxEntryCount = 3;

  NavigationControllerImpl::set_max_entry_count_for_testing(kMaxEntryCount);

  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");
  const GURL url4("http://foo/4");

  // Create a PrunedListener to observe prune notifications.
  PrunedListener listener(&controller);

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  NavigateAndCommit(url3);

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url4);
  other_contents->ExpectSetHistoryOffsetAndLength(2, 3);
  other_controller.CopyStateFromAndPrune(&controller, false);

  // We should have received a pruned notification.
  EXPECT_EQ(1, listener.notification_count_);
  EXPECT_TRUE(listener.details_.from_front);
  EXPECT_EQ(1, listener.details_.count);

  // other_controller should now contain only 3 urls: url2, url3 and url4.

  ASSERT_EQ(3, other_controller.GetEntryCount());

  ASSERT_EQ(2, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url2, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url3, other_controller.GetEntryAtIndex(1)->GetURL());
  EXPECT_EQ(url4, other_controller.GetEntryAtIndex(2)->GetURL());
  EXPECT_EQ(1, other_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(2, other_controller.GetEntryAtIndex(1)->GetPageID());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(2)->GetPageID());

  NavigationControllerImpl::set_max_entry_count_for_testing(original_count);
}

// Tests CopyStateFromAndPrune with 2 urls in source, 1 in dest, with
// replace_entry set to true.
TEST_F(NavigationControllerTest, CopyStateFromAndPruneReplaceEntry) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);

  // First two entries should have the same SiteInstance.
  SiteInstance* instance1 =
      GetSiteInstanceFromEntry(controller.GetEntryAtIndex(0));
  SiteInstance* instance2 =
      GetSiteInstanceFromEntry(controller.GetEntryAtIndex(1));
  EXPECT_EQ(instance1, instance2);
  EXPECT_EQ(0, controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(1, controller.GetEntryAtIndex(1)->GetPageID());
  EXPECT_EQ(1, contents()->GetMaxPageIDForSiteInstance(instance1));

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url3);
  other_contents->ExpectSetHistoryOffsetAndLength(1, 2);
  other_controller.CopyStateFromAndPrune(&controller, true);

  // other_controller should now contain the 2 urls: url1 and url3.

  ASSERT_EQ(2, other_controller.GetEntryCount());

  ASSERT_EQ(1, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url3, other_controller.GetEntryAtIndex(1)->GetURL());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(1)->GetPageID());

  // A new SiteInstance in a different BrowsingInstance should be used for the
  // new tab.
  SiteInstance* instance3 =
      GetSiteInstanceFromEntry(other_controller.GetEntryAtIndex(1));
  EXPECT_NE(instance3, instance1);
  EXPECT_FALSE(instance3->IsRelatedSiteInstance(instance1));

  // The max page ID map should be copied over and updated with the max page ID
  // from the current tab.
  EXPECT_EQ(1, other_contents->GetMaxPageIDForSiteInstance(instance1));
  EXPECT_EQ(0, other_contents->GetMaxPageIDForSiteInstance(instance3));
}

// Tests CopyStateFromAndPrune with 3 urls in source, 1 in dest, when the max
// entry count is 3 and replace_entry is true.  We should not prune entries.
TEST_F(NavigationControllerTest, CopyStateFromAndPruneMaxEntriesReplaceEntry) {
  NavigationControllerImpl& controller = controller_impl();
  size_t original_count = NavigationControllerImpl::max_entry_count();
  const int kMaxEntryCount = 3;

  NavigationControllerImpl::set_max_entry_count_for_testing(kMaxEntryCount);

  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");
  const GURL url4("http://foo/4");

  // Create a PrunedListener to observe prune notifications.
  PrunedListener listener(&controller);

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  NavigateAndCommit(url3);

  scoped_ptr<TestWebContents> other_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& other_controller = other_contents->GetController();
  other_contents->NavigateAndCommit(url4);
  other_contents->ExpectSetHistoryOffsetAndLength(2, 3);
  other_controller.CopyStateFromAndPrune(&controller, true);

  // We should have received no pruned notification.
  EXPECT_EQ(0, listener.notification_count_);

  // other_controller should now contain only 3 urls: url1, url2 and url4.

  ASSERT_EQ(3, other_controller.GetEntryCount());

  ASSERT_EQ(2, other_controller.GetCurrentEntryIndex());

  EXPECT_EQ(url1, other_controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url2, other_controller.GetEntryAtIndex(1)->GetURL());
  EXPECT_EQ(url4, other_controller.GetEntryAtIndex(2)->GetURL());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(0)->GetPageID());
  EXPECT_EQ(1, other_controller.GetEntryAtIndex(1)->GetPageID());
  EXPECT_EQ(0, other_controller.GetEntryAtIndex(2)->GetPageID());

  NavigationControllerImpl::set_max_entry_count_for_testing(original_count);
}

// Tests that we can navigate to the restored entries
// imported by CopyStateFromAndPrune.
TEST_F(NavigationControllerTest, CopyRestoredStateAndNavigate) {
  const GURL kRestoredUrls[] = {
    GURL("http://site1.com"),
    GURL("http://site2.com"),
  };
  const GURL kInitialUrl("http://site3.com");

  std::vector<NavigationEntry*> entries;
  for (size_t i = 0; i < arraysize(kRestoredUrls); ++i) {
    NavigationEntry* entry = NavigationControllerImpl::CreateNavigationEntry(
        kRestoredUrls[i], Referrer(), ui::PAGE_TRANSITION_RELOAD, false,
        std::string(), browser_context());
    entry->SetPageID(static_cast<int>(i));
    entries.push_back(entry);
  }

  // Create a WebContents with restored entries.
  scoped_ptr<TestWebContents> source_contents(
      static_cast<TestWebContents*>(CreateTestWebContents()));
  NavigationControllerImpl& source_controller =
      source_contents->GetController();
  source_controller.Restore(
      entries.size() - 1,
      NavigationController::RESTORE_LAST_SESSION_EXITED_CLEANLY,
      &entries);
  ASSERT_EQ(0u, entries.size());
  source_controller.LoadIfNecessary();
  source_contents->CommitPendingNavigation();

  // Load a page, then copy state from |source_contents|.
  NavigateAndCommit(kInitialUrl);
  contents()->ExpectSetHistoryOffsetAndLength(2, 3);
  controller_impl().CopyStateFromAndPrune(&source_controller, false);
  ASSERT_EQ(3, controller_impl().GetEntryCount());

  // Go back to the first entry one at a time and
  // verify that it works as expected.
  EXPECT_EQ(2, controller_impl().GetCurrentEntryIndex());
  EXPECT_EQ(kInitialUrl, controller_impl().GetActiveEntry()->GetURL());

  controller_impl().GoBack();
  contents()->CommitPendingNavigation();
  EXPECT_EQ(1, controller_impl().GetCurrentEntryIndex());
  EXPECT_EQ(kRestoredUrls[1], controller_impl().GetActiveEntry()->GetURL());

  controller_impl().GoBack();
  contents()->CommitPendingNavigation();
  EXPECT_EQ(0, controller_impl().GetCurrentEntryIndex());
  EXPECT_EQ(kRestoredUrls[0], controller_impl().GetActiveEntry()->GetURL());
}

// Tests that navigations initiated from the page (with the history object)
// work as expected, creating pending entries.
TEST_F(NavigationControllerTest, HistoryNavigate) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  NavigateAndCommit(url3);
  controller.GoBack();
  contents()->CommitPendingNavigation();
  process()->sink().ClearMessages();

  // Simulate the page calling history.back(). It should create a pending entry.
  contents()->OnGoToEntryAtOffset(-1);
  EXPECT_EQ(0, controller.GetPendingEntryIndex());
  // The actual cross-navigation is suspended until the current RVH tells us
  // it unloaded, simulate that.
  contents()->ProceedWithCrossSiteNavigation();
  // Also make sure we told the page to navigate.
  const IPC::Message* message = GetLastNavigationRequest();
  ASSERT_TRUE(message != NULL);
  GURL nav_url = GetNavigationURLFromIPC(message);
  EXPECT_EQ(url1, nav_url);
  process()->sink().ClearMessages();

  // Now test history.forward()
  contents()->OnGoToEntryAtOffset(2);
  EXPECT_EQ(2, controller.GetPendingEntryIndex());
  // The actual cross-navigation is suspended until the current RVH tells us
  // it unloaded, simulate that.
  contents()->ProceedWithCrossSiteNavigation();
  message = GetLastNavigationRequest();
  ASSERT_TRUE(message != NULL);
  nav_url = GetNavigationURLFromIPC(message);
  EXPECT_EQ(url3, nav_url);
  process()->sink().ClearMessages();

  controller.DiscardNonCommittedEntries();

  // Make sure an extravagant history.go() doesn't break.
  contents()->OnGoToEntryAtOffset(120);  // Out of bounds.
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  message = GetLastNavigationRequest();
  EXPECT_TRUE(message == NULL);
}

// Test call to PruneAllButLastCommitted for the only entry.
TEST_F(NavigationControllerTest, PruneAllButLastCommittedForSingle) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo1");
  NavigateAndCommit(url1);

  contents()->ExpectSetHistoryOffsetAndLength(0, 1);

  controller.PruneAllButLastCommitted();

  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url1);
}

// Test call to PruneAllButLastCommitted for first entry.
TEST_F(NavigationControllerTest, PruneAllButLastCommittedForFirst) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  NavigateAndCommit(url3);
  controller.GoBack();
  controller.GoBack();
  contents()->CommitPendingNavigation();

  contents()->ExpectSetHistoryOffsetAndLength(0, 1);

  controller.PruneAllButLastCommitted();

  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url1);
}

// Test call to PruneAllButLastCommitted for intermediate entry.
TEST_F(NavigationControllerTest, PruneAllButLastCommittedForIntermediate) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  NavigateAndCommit(url3);
  controller.GoBack();
  contents()->CommitPendingNavigation();

  contents()->ExpectSetHistoryOffsetAndLength(0, 1);

  controller.PruneAllButLastCommitted();

  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url2);
}

// Test call to PruneAllButLastCommitted for a pending entry that is not yet in
// the list of entries.
TEST_F(NavigationControllerTest, PruneAllButLastCommittedForPendingNotInList) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url1("http://foo/1");
  const GURL url2("http://foo/2");
  const GURL url3("http://foo/3");

  NavigateAndCommit(url1);
  NavigateAndCommit(url2);

  // Create a pending entry that is not in the entry list.
  controller.LoadURL(
      url3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(2, controller.GetEntryCount());

  contents()->ExpectSetHistoryOffsetAndLength(0, 1);
  controller.PruneAllButLastCommitted();

  // We should only have the last committed and pending entries at this point,
  // and the pending entry should still not be in the entry list.
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(url2, controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_TRUE(controller.GetPendingEntry());
  EXPECT_EQ(1, controller.GetEntryCount());

  // Try to commit the pending entry.
  main_test_rfh()->SendNavigate(2, url3);
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.GetPendingEntry());
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(url3, controller.GetEntryAtIndex(1)->GetURL());
}

// Test to ensure that when we do a history navigation back to the current
// committed page (e.g., going forward to a slow-loading page, then pressing
// the back button), we just stop the navigation to prevent the throbber from
// running continuously. Otherwise, the RenderViewHost forces the throbber to
// start, but WebKit essentially ignores the navigation and never sends a
// message to stop the throbber.
TEST_F(NavigationControllerTest, StopOnHistoryNavigationToCurrentPage) {
  NavigationControllerImpl& controller = controller_impl();
  const GURL url0("http://foo/0");
  const GURL url1("http://foo/1");

  NavigateAndCommit(url0);
  NavigateAndCommit(url1);

  // Go back to the original page, then forward to the slow page, then back
  controller.GoBack();
  contents()->CommitPendingNavigation();

  controller.GoForward();
  EXPECT_EQ(1, controller.GetPendingEntryIndex());

  controller.GoBack();
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
}

TEST_F(NavigationControllerTest, IsInitialNavigation) {
  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  // Initial state.
  EXPECT_TRUE(controller.IsInitialNavigation());

  // After commit, it stays false.
  const GURL url1("http://foo1");
  main_test_rfh()->SendNavigate(0, url1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  EXPECT_FALSE(controller.IsInitialNavigation());

  // After starting a new navigation, it stays false.
  const GURL url2("http://foo2");
  controller.LoadURL(
      url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
}

// Check that the favicon is not reused across a client redirect.
// (crbug.com/28515)
TEST_F(NavigationControllerTest, ClearFaviconOnRedirect) {
  const GURL kPageWithFavicon("http://withfavicon.html");
  const GURL kPageWithoutFavicon("http://withoutfavicon.html");
  const GURL kIconURL("http://withfavicon.ico");
  const gfx::Image kDefaultFavicon = FaviconStatus().image;

  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  main_test_rfh()->SendNavigate(0, kPageWithFavicon);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  NavigationEntry* entry = controller.GetLastCommittedEntry();
  EXPECT_TRUE(entry);
  EXPECT_EQ(kPageWithFavicon, entry->GetURL());

  // Simulate Chromium having set the favicon for |kPageWithFavicon|.
  content::FaviconStatus& favicon_status = entry->GetFavicon();
  favicon_status.image = CreateImage(SK_ColorWHITE);
  favicon_status.url = kIconURL;
  favicon_status.valid = true;
  EXPECT_FALSE(DoImagesMatch(kDefaultFavicon, entry->GetFavicon().image));

  main_test_rfh()->SendNavigateWithTransition(
      0,  // same page ID.
      kPageWithoutFavicon,
      ui::PAGE_TRANSITION_CLIENT_REDIRECT);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  entry = controller.GetLastCommittedEntry();
  EXPECT_TRUE(entry);
  EXPECT_EQ(kPageWithoutFavicon, entry->GetURL());

  EXPECT_TRUE(DoImagesMatch(kDefaultFavicon, entry->GetFavicon().image));
}

// Check that the favicon is not cleared for NavigationEntries which were
// previously navigated to.
TEST_F(NavigationControllerTest, BackNavigationDoesNotClearFavicon) {
  const GURL kUrl1("http://www.a.com/1");
  const GURL kUrl2("http://www.a.com/2");
  const GURL kIconURL("http://www.a.com/1/favicon.ico");

  NavigationControllerImpl& controller = controller_impl();
  TestNotificationTracker notifications;
  RegisterForAllNavNotifications(&notifications, &controller);

  main_test_rfh()->SendNavigate(0, kUrl1);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Simulate Chromium having set the favicon for |kUrl1|.
  gfx::Image favicon_image = CreateImage(SK_ColorWHITE);
  content::NavigationEntry* entry = controller.GetLastCommittedEntry();
  EXPECT_TRUE(entry);
  content::FaviconStatus& favicon_status = entry->GetFavicon();
  favicon_status.image = favicon_image;
  favicon_status.url = kIconURL;
  favicon_status.valid = true;

  // Navigate to another page and go back to the original page.
  main_test_rfh()->SendNavigate(1, kUrl2);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;
  main_test_rfh()->SendNavigateWithTransition(
      0,
      kUrl1,
      ui::PAGE_TRANSITION_FORWARD_BACK);
  EXPECT_EQ(1U, navigation_entry_committed_counter_);
  navigation_entry_committed_counter_ = 0;

  // Verify that the favicon for the page at |kUrl1| was not cleared.
  entry = controller.GetEntryAtIndex(0);
  EXPECT_TRUE(entry);
  EXPECT_EQ(kUrl1, entry->GetURL());
  EXPECT_TRUE(DoImagesMatch(favicon_image, entry->GetFavicon().image));
}

// The test crashes on android: http://crbug.com/170449
#if defined(OS_ANDROID)
#define MAYBE_PurgeScreenshot DISABLED_PurgeScreenshot
#else
#define MAYBE_PurgeScreenshot PurgeScreenshot
#endif
// Tests that screenshot are purged correctly.
TEST_F(NavigationControllerTest, MAYBE_PurgeScreenshot) {
  NavigationControllerImpl& controller = controller_impl();

  NavigationEntryImpl* entry;

  // Navigate enough times to make sure that some screenshots are purged.
  for (int i = 0; i < 12; ++i) {
    const GURL url(base::StringPrintf("http://foo%d/", i));
    NavigateAndCommit(url);
    EXPECT_EQ(i, controller.GetCurrentEntryIndex());
  }

  MockScreenshotManager* screenshot_manager =
      new MockScreenshotManager(&controller);
  controller.SetScreenshotManager(screenshot_manager);
  for (int i = 0; i < controller.GetEntryCount(); ++i) {
    entry = NavigationEntryImpl::FromNavigationEntry(
        controller.GetEntryAtIndex(i));
    screenshot_manager->TakeScreenshotFor(entry);
    EXPECT_TRUE(entry->screenshot().get());
  }

  NavigateAndCommit(GURL("https://foo/"));
  EXPECT_EQ(13, controller.GetEntryCount());
  entry = NavigationEntryImpl::FromNavigationEntry(
      controller.GetEntryAtIndex(11));
  screenshot_manager->TakeScreenshotFor(entry);

  for (int i = 0; i < 2; ++i) {
    entry = NavigationEntryImpl::FromNavigationEntry(
        controller.GetEntryAtIndex(i));
    EXPECT_FALSE(entry->screenshot().get()) << "Screenshot " << i
                                            << " not purged";
  }

  for (int i = 2; i < controller.GetEntryCount() - 1; ++i) {
    entry = NavigationEntryImpl::FromNavigationEntry(
        controller.GetEntryAtIndex(i));
    EXPECT_TRUE(entry->screenshot().get()) << "Screenshot not found for " << i;
  }

  // Navigate to index 5 and then try to assign screenshot to all entries.
  controller.GoToIndex(5);
  contents()->CommitPendingNavigation();
  EXPECT_EQ(5, controller.GetCurrentEntryIndex());
  for (int i = 0; i < controller.GetEntryCount() - 1; ++i) {
    entry = NavigationEntryImpl::FromNavigationEntry(
        controller.GetEntryAtIndex(i));
    screenshot_manager->TakeScreenshotFor(entry);
  }

  for (int i = 10; i <= 12; ++i) {
    entry = NavigationEntryImpl::FromNavigationEntry(
        controller.GetEntryAtIndex(i));
    EXPECT_FALSE(entry->screenshot().get()) << "Screenshot " << i
                                            << " not purged";
    screenshot_manager->TakeScreenshotFor(entry);
  }

  // Navigate to index 7 and assign screenshot to all entries.
  controller.GoToIndex(7);
  contents()->CommitPendingNavigation();
  EXPECT_EQ(7, controller.GetCurrentEntryIndex());
  for (int i = 0; i < controller.GetEntryCount() - 1; ++i) {
    entry = NavigationEntryImpl::FromNavigationEntry(
        controller.GetEntryAtIndex(i));
    screenshot_manager->TakeScreenshotFor(entry);
  }

  for (int i = 0; i < 2; ++i) {
    entry = NavigationEntryImpl::FromNavigationEntry(
        controller.GetEntryAtIndex(i));
    EXPECT_FALSE(entry->screenshot().get()) << "Screenshot " << i
                                            << " not purged";
  }

  // Clear all screenshots.
  EXPECT_EQ(13, controller.GetEntryCount());
  EXPECT_EQ(10, screenshot_manager->GetScreenshotCount());
  controller.ClearAllScreenshots();
  EXPECT_EQ(0, screenshot_manager->GetScreenshotCount());
  for (int i = 0; i < controller.GetEntryCount(); ++i) {
    entry = NavigationEntryImpl::FromNavigationEntry(
        controller.GetEntryAtIndex(i));
    EXPECT_FALSE(entry->screenshot().get()) << "Screenshot " << i
                                            << " not cleared";
  }
}

TEST_F(NavigationControllerTest, PushStateUpdatesTitleAndFavicon) {
  // Navigate.
  contents()->GetMainFrame()->SendNavigate(1, GURL("http://foo"));

  // Set title and favicon.
  base::string16 title(base::ASCIIToUTF16("Title"));
  FaviconStatus favicon;
  favicon.valid = true;
  favicon.url = GURL("http://foo/favicon.ico");
  controller().GetLastCommittedEntry()->SetTitle(title);
  controller().GetLastCommittedEntry()->GetFavicon() = favicon;

  // history.pushState() is called.
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  GURL url("http://foo#foo");
  params.page_id = 2;
  params.url = url;
  params.page_state = PageState::CreateFromURL(url);
  params.was_within_same_page = true;
  contents()->GetMainFrame()->SendNavigateWithParams(&params);

  // The title should immediately be visible on the new NavigationEntry.
  base::string16 new_title =
      controller().GetLastCommittedEntry()->GetTitleForDisplay(std::string());
  EXPECT_EQ(title, new_title);
  FaviconStatus new_favicon =
      controller().GetLastCommittedEntry()->GetFavicon();
  EXPECT_EQ(favicon.valid, new_favicon.valid);
  EXPECT_EQ(favicon.url, new_favicon.url);
}

// Test that the navigation controller clears its session history when a
// navigation commits with the clear history list flag set.
TEST_F(NavigationControllerTest, ClearHistoryList) {
  const GURL url1("http://foo1");
  const GURL url2("http://foo2");
  const GURL url3("http://foo3");
  const GURL url4("http://foo4");

  NavigationControllerImpl& controller = controller_impl();

  // Create a session history with three entries, second entry is active.
  NavigateAndCommit(url1);
  NavigateAndCommit(url2);
  NavigateAndCommit(url3);
  controller.GoBack();
  contents()->CommitPendingNavigation();
  EXPECT_EQ(3, controller.GetEntryCount());
  EXPECT_EQ(1, controller.GetCurrentEntryIndex());

  // Create a new pending navigation, and indicate that the session history
  // should be cleared.
  NavigationController::LoadURLParams params(url4);
  params.should_clear_history_list = true;
  controller.LoadURLWithParams(params);

  // Verify that the pending entry correctly indicates that the session history
  // should be cleared.
  NavigationEntryImpl* entry =
      NavigationEntryImpl::FromNavigationEntry(
          controller.GetPendingEntry());
  ASSERT_TRUE(entry);
  EXPECT_TRUE(entry->should_clear_history_list());

  // Assume that the RF correctly cleared its history and commit the navigation.
  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kEnableBrowserSideNavigation)) {
    contents()->GetMainFrame()->PrepareForCommit(entry->GetURL());
  }
  contents()->GetPendingMainFrame()->
      set_simulate_history_list_was_cleared(true);
  contents()->CommitPendingNavigation();

  // Verify that the NavigationController's session history was correctly
  // cleared.
  EXPECT_EQ(1, controller.GetEntryCount());
  EXPECT_EQ(0, controller.GetCurrentEntryIndex());
  EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
  EXPECT_EQ(-1, controller.GetPendingEntryIndex());
  EXPECT_FALSE(controller.CanGoBack());
  EXPECT_FALSE(controller.CanGoForward());
  EXPECT_EQ(url4, controller.GetVisibleEntry()->GetURL());
}

TEST_F(NavigationControllerTest, PostThenReplaceStateThenReload) {
  scoped_ptr<TestWebContentsDelegate> delegate(new TestWebContentsDelegate());
  EXPECT_FALSE(contents()->GetDelegate());
  contents()->SetDelegate(delegate.get());

  // Submit a form.
  GURL url("http://foo");
  FrameHostMsg_DidCommitProvisionalLoad_Params params;
  params.page_id = 1;
  params.url = url;
  params.transition = ui::PAGE_TRANSITION_FORM_SUBMIT;
  params.gesture = NavigationGestureUser;
  params.page_state = PageState::CreateFromURL(url);
  params.was_within_same_page = false;
  params.is_post = true;
  params.post_id = 2;
  contents()->GetMainFrame()->SendNavigateWithParams(&params);

  // history.replaceState() is called.
  GURL replace_url("http://foo#foo");
  params.page_id = 1;
  params.url = replace_url;
  params.transition = ui::PAGE_TRANSITION_LINK;
  params.gesture = NavigationGestureUser;
  params.page_state = PageState::CreateFromURL(replace_url);
  params.was_within_same_page = true;
  params.is_post = false;
  params.post_id = -1;
  contents()->GetMainFrame()->SendNavigateWithParams(&params);

  // Now reload. replaceState overrides the POST, so we should not show a
  // repost warning dialog.
  controller_impl().Reload(true);
  EXPECT_EQ(0, delegate->repost_form_warning_count());
}

}  // namespace content