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// Copyright 2020 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/performance_manager/mechanisms/page_discarder.h"
#include <utility>
#include <vector>
#include "base/memory/weak_ptr.h"
#include "chrome/browser/performance_manager/public/user_tuning/user_performance_tuning_manager.h"
#include "chrome/browser/resource_coordinator/lifecycle_unit_state.mojom.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/performance_manager/graph/frame_node_impl.h"
#include "components/performance_manager/public/graph/graph_operations.h"
#include "components/performance_manager/public/graph/page_node.h"
#include "components/performance_manager/public/performance_manager.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/test/browser_test.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"
#include "ui/base/window_open_disposition.h"
#include "url/gurl.h"
namespace performance_manager {
using LifecycleUnitDiscardReason = ::mojom::LifecycleUnitDiscardReason;
using PageDiscarder = mechanism::PageDiscarder;
class PageDiscarderBrowserTest
: public InProcessBrowserTest,
public ::testing::WithParamInterface<LifecycleUnitDiscardReason> {};
INSTANTIATE_TEST_SUITE_P(
All,
PageDiscarderBrowserTest,
::testing::Values(LifecycleUnitDiscardReason::URGENT,
LifecycleUnitDiscardReason::PROACTIVE));
IN_PROC_BROWSER_TEST_P(PageDiscarderBrowserTest, DiscardPageNodes) {
const LifecycleUnitDiscardReason discard_reason = GetParam();
ASSERT_TRUE(embedded_test_server()->Start());
content::RenderFrameHost* frame_host = NavigateToURLWithDisposition(
browser(), embedded_test_server()->GetURL("/title1.html"),
WindowOpenDisposition::NEW_BACKGROUND_TAB,
ui_test_utils::BROWSER_TEST_WAIT_FOR_LOAD_STOP);
ASSERT_TRUE(frame_host);
auto* contents = content::WebContents::FromRenderFrameHost(frame_host);
uint64_t total = 0;
base::WeakPtr<PageNode> page_node =
PerformanceManager::GetPrimaryPageNodeForWebContents(contents);
ASSERT_TRUE(page_node);
// Simulate that there are PMF estimates available for the frames in
// this page.
GraphOperations::VisitFrameTreePreOrder(
page_node.get(), [&total](const FrameNode* frame_node) {
total += 1;
FrameNodeImpl::FromNode(frame_node)->SetPrivateFootprintKbEstimate(1);
return true;
});
PageDiscarder discarder;
std::optional<uint64_t> estimated_memory_freed_kb =
discarder.DiscardPageNode(page_node.get(), discard_reason);
EXPECT_TRUE(estimated_memory_freed_kb.has_value());
auto* new_contents = browser()->tab_strip_model()->GetWebContentsAt(1);
EXPECT_TRUE(new_contents->WasDiscarded());
auto* pre_discard_resource_usage = user_tuning::UserPerformanceTuningManager::
PreDiscardResourceUsage::FromWebContents(new_contents);
EXPECT_TRUE(pre_discard_resource_usage);
EXPECT_EQ(total, pre_discard_resource_usage->memory_footprint_estimate_kb());
}
} // namespace performance_manager
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