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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/resource_coordinator/tab_helper.h"
#include "base/functional/bind.h"
#include "chrome/browser/resource_coordinator/tab_load_tracker.h"
#include "chrome/browser/resource_coordinator/tab_load_tracker_test_support.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/prerender_test_util.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
class WebContents;
}
namespace resource_coordinator {
namespace {
class MockLoadingStateHelper : public TabLoadTracker::Observer {
public:
MockLoadingStateHelper() {
resource_coordinator::TabLoadTracker::Get()->AddObserver(this);
}
~MockLoadingStateHelper() override {
resource_coordinator::TabLoadTracker::Get()->RemoveObserver(this);
}
MOCK_METHOD(void,
OnLoadingStateChange,
(content::WebContents * web_contents,
LoadingState old_loading_state,
LoadingState new_loading_state),
(override));
};
} // namespace
class TabHelperBrowserTest : public InProcessBrowserTest {
public:
TabHelperBrowserTest()
: prerender_test_helper_(
base::BindRepeating(&TabHelperBrowserTest::GetWebContents,
base::Unretained(this))) {}
~TabHelperBrowserTest() override = default;
void SetUp() override {
prerender_test_helper_.RegisterServerRequestMonitor(embedded_test_server());
InProcessBrowserTest::SetUp();
}
void SetUpOnMainThread() override {
test_server_handle_ = embedded_test_server()->StartAndReturnHandle();
}
content::test::PrerenderTestHelper& prerender_helper() {
return prerender_test_helper_;
}
content::WebContents* GetWebContents() {
return browser()->tab_strip_model()->GetActiveWebContents();
}
void WaitForTabsToLoad() {
resource_coordinator::WaitForTransitionToLoaded(GetWebContents());
}
private:
content::test::PrerenderTestHelper prerender_test_helper_;
net::test_server::EmbeddedTestServerHandle test_server_handle_;
};
// Tests that `ukm_source_id_` from ResourceCoordinatorTabHelper is updated and
// used only with the active page loading. Since `ukm_source_id_` is used in
// TabManagerStatsCollector::OnTabIsLoaded() triggered by
// OnLoadingStateChange(), this test checks that OnLoadingStateChange() is not
// called in prerendering.
IN_PROC_BROWSER_TEST_F(TabHelperBrowserTest,
TabHelperBrowserTestInPrerendering) {
// Ensure that state change for the previous loading is completed.
WaitForTabsToLoad();
// Initial navigation.
MockLoadingStateHelper mock_loading_state_helper;
GURL initial_url = embedded_test_server()->GetURL("/empty.html");
// The state is changed twice from LOADED to LOADING and from LOADING to
// LOADED.
EXPECT_CALL(mock_loading_state_helper, OnLoadingStateChange).Times(2);
ASSERT_NE(ui_test_utils::NavigateToURL(browser(), initial_url), nullptr);
resource_coordinator::ResourceCoordinatorTabHelper* observer =
resource_coordinator::ResourceCoordinatorTabHelper::FromWebContents(
GetWebContents());
WaitForTabsToLoad();
ukm::SourceId initial_source_id = observer->ukm_source_id();
// UKM source id is updated by the initial loading.
DCHECK_NE(initial_source_id, ukm::kInvalidSourceId);
// Load a page in the prerender.
GURL prerender_url = embedded_test_server()->GetURL("/title1.html");
// The prerendering doesn't trigger any loading state change.
EXPECT_CALL(mock_loading_state_helper, OnLoadingStateChange).Times(0);
prerender_helper().AddPrerender(prerender_url);
// The source id should not be updated in prerendering.
DCHECK_EQ(initial_source_id, observer->ukm_source_id());
// The state is changed twice from LOADED to LOADING and from LOADING to
// LOADED.
EXPECT_CALL(mock_loading_state_helper, OnLoadingStateChange).Times(2);
// Activate the prerendered page.
prerender_helper().NavigatePrimaryPage(prerender_url);
WaitForTabsToLoad();
// The source id should be updated by changing primary page.
DCHECK_NE(initial_source_id, observer->ukm_source_id());
}
} // namespace resource_coordinator
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