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// Copyright 2025 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/policies/termination_target_policy.h"
#include <memory>
#include "chrome/browser/performance_manager/mechanisms/termination_target_setter.h"
#include "chrome/browser/performance_manager/policies/discard_eligibility_policy.h"
#include "chrome/browser/performance_manager/test_support/page_discarding_utils.h"
#include "components/performance_manager/graph/process_node_impl.h"
namespace performance_manager {
namespace {
class LenientMockTerminationTargetSetter : public TerminationTargetSetter {
public:
LenientMockTerminationTargetSetter() = default;
~LenientMockTerminationTargetSetter() override = default;
LenientMockTerminationTargetSetter(
const LenientMockTerminationTargetSetter& other) = delete;
LenientMockTerminationTargetSetter& operator=(
const LenientMockTerminationTargetSetter&) = delete;
MOCK_METHOD1(SetTerminationTarget, void(const ProcessNode*));
private:
};
using MockTerminationTargetSetter =
::testing::StrictMock<LenientMockTerminationTargetSetter>;
class TerminationTargetPolicyTest : public GraphTestHarness {
public:
TerminationTargetPolicyTest() = default;
~TerminationTargetPolicyTest() override = default;
void SetUp() override {
GraphTestHarness::SetUp();
auto termination_target_setter =
std::make_unique<MockTerminationTargetSetter>();
termination_target_setter_ = termination_target_setter.get();
graph()->PassToGraph(std::make_unique<TerminationTargetPolicy>(
std::move(termination_target_setter)));
auto eligibility_policy =
std::make_unique<policies::DiscardEligibilityPolicy>();
eligibility_policy->SetNoDiscardPatternsForProfile("", {});
graph()->PassToGraph(std::move(eligibility_policy));
}
void TearDown() override {
termination_target_setter_ = nullptr;
policy_.reset();
GraphTestHarness::TearDown();
}
raw_ptr<MockTerminationTargetSetter> termination_target_setter_ = nullptr;
private:
std::unique_ptr<TerminationTargetPolicy> policy_;
};
} // namespace
TEST_F(TerminationTargetPolicyTest, Basic) {
AdvanceClock(base::Milliseconds(1));
// Old, small, non-discardable
auto process1 = CreateRendererProcessNode();
process1->SetProcess(base::Process::Current(), base::TimeTicks::Now());
auto page1 = CreateNode<PageNodeImpl>();
auto frame1 = CreateFrameNodeAutoId(process1.get(), page1.get());
testing::MakePageNodeDiscardable(page1.get(), task_env());
process1->set_private_footprint_kb(2 * 1024);
page1->SetIsAudible(true);
// Old, small, discardable, same process as `page1`
auto page2 = CreateNode<PageNodeImpl>();
auto frame2 = CreateFrameNodeAutoId(process1.get(), page2.get());
testing::MakePageNodeDiscardable(page2.get(), task_env());
AdvanceClock(base::Milliseconds(1));
// Large, discardable
auto process3 = CreateRendererProcessNode();
process3->SetProcess(base::Process::Current(), base::TimeTicks::Now());
auto page3 = CreateNode<PageNodeImpl>();
auto frame3 = CreateFrameNodeAutoId(process3.get(), page3.get());
testing::MakePageNodeDiscardable(page3.get(), task_env());
process3->set_private_footprint_kb(600 * 1024);
AdvanceClock(base::Milliseconds(1));
// Recent, small, discardable
auto process4 = CreateRendererProcessNode();
process4->SetProcess(base::Process::Current(), base::TimeTicks::Now());
auto page4 = CreateNode<PageNodeImpl>();
auto frame4 = CreateFrameNodeAutoId(process4.get(), page4.get());
testing::MakePageNodeDiscardable(page4.get(), task_env());
process4->set_private_footprint_kb(80 * 1024);
AdvanceClock(base::Milliseconds(1));
// Not a renderer
auto process5 = CreateNode<ProcessNodeImpl>(BrowserProcessNodeTag{});
process5->SetProcess(base::Process::Current(), base::TimeTicks::Now());
AdvanceClock(base::Milliseconds(1));
// Renderer without a valid process handle
auto process6 = CreateRendererProcessNode();
AdvanceClock(base::Milliseconds(1));
// Verify that termination targets are set correctly.
EXPECT_CALL(*termination_target_setter_,
SetTerminationTarget(process3.get()));
GetSystemNode()->OnProcessMemoryMetricsAvailable();
::testing::Mock::VerifyAndClearExpectations(termination_target_setter_);
EXPECT_CALL(*termination_target_setter_,
SetTerminationTarget(process4.get()));
frame3.reset();
page3.reset();
process3.reset();
::testing::Mock::VerifyAndClearExpectations(termination_target_setter_);
EXPECT_CALL(*termination_target_setter_,
SetTerminationTarget(process1.get()));
frame1.reset();
page1.reset();
::testing::Mock::VerifyAndClearExpectations(termination_target_setter_);
EXPECT_CALL(*termination_target_setter_,
SetTerminationTarget(process4.get()));
page2->SetIsVisible(true);
page2->SetIsVisible(false);
::testing::Mock::VerifyAndClearExpectations(termination_target_setter_);
frame2.reset();
EXPECT_CALL(*termination_target_setter_,
SetTerminationTarget(process1.get()));
page2.reset();
::testing::Mock::VerifyAndClearExpectations(termination_target_setter_);
EXPECT_CALL(*termination_target_setter_,
SetTerminationTarget(process4.get()));
process1.reset();
::testing::Mock::VerifyAndClearExpectations(termination_target_setter_);
EXPECT_CALL(*termination_target_setter_, SetTerminationTarget(nullptr));
frame4.reset();
page4.reset();
process4.reset();
::testing::Mock::VerifyAndClearExpectations(termination_target_setter_);
}
} // namespace performance_manager
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