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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 "components/performance_manager/public/scenarios/process_performance_scenarios.h"
#include <optional>
#include "base/containers/span.h"
#include "base/memory/platform_shared_memory_handle.h"
#include "base/memory/shared_memory_mapper.h"
#include "base/scoped_observation.h"
#include "components/performance_manager/embedder/scoped_global_scenario_memory.h"
#include "components/performance_manager/graph/process_node_impl.h"
#include "components/performance_manager/public/graph/graph.h"
#include "components/performance_manager/scenario_api/performance_scenario_observer.h"
#include "components/performance_manager/scenario_api/performance_scenarios.h"
#include "components/performance_manager/scenarios/browser_performance_scenarios.h"
#include "components/performance_manager/scenarios/performance_scenario_data.h"
#include "components/performance_manager/test_support/graph_test_harness.h"
#include "components/performance_manager/test_support/mock_graphs.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace performance_manager {
namespace {
using performance_scenarios::InputScenario;
using performance_scenarios::LoadingScenario;
using performance_scenarios::MatchingScenarioObserver;
using performance_scenarios::PerformanceScenarioObserver;
using performance_scenarios::ScenarioScope;
class LenientMockPerformanceScenarioObserver
: public PerformanceScenarioObserver {
public:
MOCK_METHOD(void,
OnLoadingScenarioChanged,
(ScenarioScope scope,
LoadingScenario old_scenario,
LoadingScenario new_scenario),
(override));
MOCK_METHOD(void,
OnInputScenarioChanged,
(ScenarioScope scope,
InputScenario old_scenario,
InputScenario new_scenario),
(override));
};
using MockPerformanceScenarioObserver =
::testing::StrictMock<LenientMockPerformanceScenarioObserver>;
class LenientMockMatchingScenarioObserver : public MatchingScenarioObserver {
public:
explicit LenientMockMatchingScenarioObserver(
performance_scenarios::ScenarioPattern pattern)
: MatchingScenarioObserver(pattern) {}
MOCK_METHOD(void,
OnScenarioMatchChanged,
(ScenarioScope scope, bool matches_pattern),
(override));
};
using MockMatchingScenarioObserver =
::testing::StrictMock<LenientMockMatchingScenarioObserver>;
// A fake SharedMemoryMapper that fails to map in memory.
class FailingSharedMemoryMapper final : public base::SharedMemoryMapper {
public:
FailingSharedMemoryMapper() = default;
~FailingSharedMemoryMapper() = default;
std::optional<base::span<uint8_t>> Map(
base::subtle::PlatformSharedMemoryHandle handle,
bool write_allowed,
uint64_t offset,
size_t size) final {
return std::nullopt;
}
void Unmap(base::span<uint8_t> mapping) final {}
};
class ProcessPerformanceScenariosTest : public GraphTestHarness {
private:
// Always map global memory. Per-process memory will be mapped automatically
// as process nodes are created.
ScopedGlobalScenarioMemory scoped_global_scenario_memory_;
};
} // namespace
TEST_F(ProcessPerformanceScenariosTest, LoadingScenario) {
MockSinglePageWithMultipleProcessesGraph mock_graph(graph());
EXPECT_EQ(GetProcessLoadingScenario(mock_graph.process.get()),
LoadingScenario::kNoPageLoading);
EXPECT_EQ(GetProcessLoadingScenario(mock_graph.other_process.get()),
LoadingScenario::kNoPageLoading);
MockPerformanceScenarioObserver mock_observer;
base::ScopedObservation<ProcessNode, PerformanceScenarioObserver> observation(
&mock_observer);
observation.Observe(mock_graph.process.get());
MockMatchingScenarioObserver mock_matching_observer(
performance_scenarios::kDefaultIdleScenarios);
base::ScopedObservation<ProcessNode, MatchingScenarioObserver>
matching_observation(&mock_matching_observer);
matching_observation.Observe(mock_graph.process.get());
// Changing to kBackgroundPageLoading should invoke the
// PerformanceScenarioObserver but not the MatchingScenarioObserver, since it
// still matches kDefaultIdleScenarios.
EXPECT_CALL(mock_observer, OnLoadingScenarioChanged(
ScenarioScope::kCurrentProcess,
LoadingScenario::kNoPageLoading,
LoadingScenario::kBackgroundPageLoading));
SetLoadingScenarioForProcessNode(LoadingScenario::kBackgroundPageLoading,
mock_graph.process.get());
EXPECT_EQ(GetProcessLoadingScenario(mock_graph.process.get()),
LoadingScenario::kBackgroundPageLoading);
::testing::Mock::VerifyAndClearExpectations(&mock_observer);
::testing::Mock::VerifyAndClearExpectations(&mock_matching_observer);
// Observers shouldn't be notified if the scenario doesn't change.
SetLoadingScenarioForProcessNode(LoadingScenario::kBackgroundPageLoading,
mock_graph.process.get());
EXPECT_EQ(GetProcessLoadingScenario(mock_graph.process.get()),
LoadingScenario::kBackgroundPageLoading);
::testing::Mock::VerifyAndClearExpectations(&mock_observer);
::testing::Mock::VerifyAndClearExpectations(&mock_matching_observer);
// Observer shouldn't be notified for changes to a different process, or for
// global changes.
SetLoadingScenarioForProcessNode(LoadingScenario::kVisiblePageLoading,
mock_graph.other_process.get());
SetGlobalLoadingScenario(LoadingScenario::kFocusedPageLoading);
EXPECT_EQ(GetProcessLoadingScenario(mock_graph.other_process.get()),
LoadingScenario::kVisiblePageLoading);
::testing::Mock::VerifyAndClearExpectations(&mock_observer);
::testing::Mock::VerifyAndClearExpectations(&mock_matching_observer);
// Changing to kVisiblePageLoading should notify both observers since the
// scenario no longer matches kDefaultIdleScenarios.
EXPECT_CALL(mock_observer,
OnLoadingScenarioChanged(ScenarioScope::kCurrentProcess,
LoadingScenario::kBackgroundPageLoading,
LoadingScenario::kVisiblePageLoading));
EXPECT_CALL(mock_matching_observer,
OnScenarioMatchChanged(ScenarioScope::kCurrentProcess, false));
SetLoadingScenarioForProcessNode(LoadingScenario::kVisiblePageLoading,
mock_graph.process.get());
EXPECT_EQ(GetProcessLoadingScenario(mock_graph.process.get()),
LoadingScenario::kVisiblePageLoading);
::testing::Mock::VerifyAndClearExpectations(&mock_observer);
::testing::Mock::VerifyAndClearExpectations(&mock_matching_observer);
}
TEST_F(ProcessPerformanceScenariosTest, InputScenario) {
MockSinglePageWithMultipleProcessesGraph mock_graph(graph());
EXPECT_EQ(GetProcessInputScenario(mock_graph.process.get()),
InputScenario::kNoInput);
EXPECT_EQ(GetProcessInputScenario(mock_graph.other_process.get()),
InputScenario::kNoInput);
MockPerformanceScenarioObserver mock_observer;
base::ScopedObservation<ProcessNode, PerformanceScenarioObserver> observation(
&mock_observer);
observation.Observe(mock_graph.process.get());
MockMatchingScenarioObserver mock_matching_observer(
performance_scenarios::kDefaultIdleScenarios);
base::ScopedObservation<ProcessNode, MatchingScenarioObserver>
matching_observation(&mock_matching_observer);
matching_observation.Observe(mock_graph.process.get());
// Changing to kTyping should notify both observers since the scenario no
// longer matches kDefaultIdleScenarios.
EXPECT_CALL(
mock_observer,
OnInputScenarioChanged(ScenarioScope::kCurrentProcess,
InputScenario::kNoInput, InputScenario::kTyping));
EXPECT_CALL(mock_matching_observer,
OnScenarioMatchChanged(ScenarioScope::kCurrentProcess, false));
SetInputScenarioForProcessNode(InputScenario::kTyping,
mock_graph.process.get());
EXPECT_EQ(GetProcessInputScenario(mock_graph.process.get()),
InputScenario::kTyping);
::testing::Mock::VerifyAndClearExpectations(&mock_observer);
::testing::Mock::VerifyAndClearExpectations(&mock_matching_observer);
// Observers shouldn't be notified if the scenario doesn't change.
SetInputScenarioForProcessNode(InputScenario::kTyping,
mock_graph.process.get());
EXPECT_EQ(GetProcessInputScenario(mock_graph.process.get()),
InputScenario::kTyping);
::testing::Mock::VerifyAndClearExpectations(&mock_observer);
::testing::Mock::VerifyAndClearExpectations(&mock_matching_observer);
// Observer shouldn't be notified for changes to a different process, or for
// global changes.
SetInputScenarioForProcessNode(InputScenario::kTap,
mock_graph.other_process.get());
SetGlobalInputScenario(InputScenario::kScroll);
EXPECT_EQ(GetProcessInputScenario(mock_graph.other_process.get()),
InputScenario::kTap);
::testing::Mock::VerifyAndClearExpectations(&mock_observer);
::testing::Mock::VerifyAndClearExpectations(&mock_matching_observer);
// Changing to kTap should invoke the PerformanceScenarioObserver but not the
// MatchingScenarioObserver, since it still doesn't match
// kDefaultIdleScenarios.
EXPECT_CALL(mock_observer, OnInputScenarioChanged(
ScenarioScope::kCurrentProcess,
InputScenario::kTyping, InputScenario::kTap));
SetInputScenarioForProcessNode(InputScenario::kTap, mock_graph.process.get());
EXPECT_EQ(GetProcessInputScenario(mock_graph.process.get()),
InputScenario::kTap);
::testing::Mock::VerifyAndClearExpectations(&mock_observer);
::testing::Mock::VerifyAndClearExpectations(&mock_matching_observer);
}
TEST_F(ProcessPerformanceScenariosTest, NoMemory) {
MockSinglePageInSingleProcessGraph mock_graph(graph());
// First access to the PerformanceScenarioData uses a failing mapper.
FailingSharedMemoryMapper failing_mapper;
EXPECT_FALSE(PerformanceScenarioData::Exists(mock_graph.process.get()));
auto& data = PerformanceScenarioData::GetOrCreate(mock_graph.process.get(),
&failing_mapper);
EXPECT_FALSE(data.HasSharedState());
// Reading the process scenario should return default values when memory
// mapping failed.
EXPECT_EQ(GetProcessLoadingScenario(mock_graph.process.get()),
LoadingScenario::kNoPageLoading);
EXPECT_EQ(GetProcessInputScenario(mock_graph.process.get()),
InputScenario::kNoInput);
// Writing to process state should do nothing. Observers should not be
// notified.
MockPerformanceScenarioObserver mock_observer;
base::ScopedObservation<ProcessNode, PerformanceScenarioObserver> observation(
&mock_observer);
observation.Observe(mock_graph.process.get());
MockMatchingScenarioObserver mock_matching_observer(
performance_scenarios::kDefaultIdleScenarios);
base::ScopedObservation<ProcessNode, MatchingScenarioObserver>
matching_observation(&mock_matching_observer);
matching_observation.Observe(mock_graph.process.get());
SetLoadingScenarioForProcessNode(LoadingScenario::kVisiblePageLoading,
mock_graph.process.get());
SetInputScenarioForProcessNode(InputScenario::kTyping,
mock_graph.process.get());
EXPECT_EQ(GetProcessLoadingScenario(mock_graph.process.get()),
LoadingScenario::kNoPageLoading);
EXPECT_EQ(GetProcessInputScenario(mock_graph.process.get()),
InputScenario::kNoInput);
}
} // namespace performance_manager
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