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// Copyright 2024 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/scenario_api/performance_scenarios.h"
#include <atomic>
#include <ostream>
#include <utility>
#include "base/containers/enum_set.h"
#include "base/memory/read_only_shared_memory_region.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/structured_shared_memory.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace performance_scenarios {
// Test printers.
std::ostream& operator<<(std::ostream& os, LoadingScenario loading_scenario) {
switch (loading_scenario) {
case LoadingScenario::kNoPageLoading:
return os << "NoPageLoading";
case LoadingScenario::kFocusedPageLoading:
return os << "FocusedPageLoading";
case LoadingScenario::kVisiblePageLoading:
return os << "VisiblePageLoading";
case LoadingScenario::kBackgroundPageLoading:
return os << "BackgroundPageLoading";
}
}
std::ostream& operator<<(std::ostream& os, InputScenario input_scenario) {
switch (input_scenario) {
case InputScenario::kNoInput:
return os << "NoInput";
case InputScenario::kTyping:
return os << "TypingInput";
}
}
namespace {
// Tests that are repeated for all scenarios of a given type.
using PerformanceScenariosAllLoadingScenariosTest =
::testing::TestWithParam<LoadingScenario>;
using PerformanceScenariosAllInputScenariosTest =
::testing::TestWithParam<InputScenario>;
INSTANTIATE_TEST_SUITE_P(All,
PerformanceScenariosAllLoadingScenariosTest,
::testing::ValuesIn(LoadingScenarios::All()));
INSTANTIATE_TEST_SUITE_P(All,
PerformanceScenariosAllInputScenariosTest,
::testing::ValuesIn(InputScenarios::All()));
TEST(PerformanceScenariosTest, MappedScenarioState) {
auto shared_memory = base::StructuredSharedMemory<ScenarioState>::Create();
ASSERT_TRUE(shared_memory.has_value());
// Before the shared memory is mapped in, GetLoadingScenario should return
// default values.
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kCurrentProcess)
->load(std::memory_order_relaxed),
LoadingScenario::kNoPageLoading);
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kGlobal)
->load(std::memory_order_relaxed),
LoadingScenario::kNoPageLoading);
{
// Map the shared memory as the global state.
ScopedReadOnlyScenarioMemory mapped_global_memory(
ScenarioScope::kGlobal, shared_memory->DuplicateReadOnlyRegion());
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kGlobal)
->load(std::memory_order_relaxed),
LoadingScenario::kNoPageLoading);
// Updates should be visible in the global state only.
shared_memory->WritableRef().loading.store(
LoadingScenario::kFocusedPageLoading, std::memory_order_relaxed);
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kGlobal)
->load(std::memory_order_relaxed),
LoadingScenario::kFocusedPageLoading);
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kCurrentProcess)
->load(std::memory_order_relaxed),
LoadingScenario::kNoPageLoading);
// Map the same shared memory as the per-process state.
ScopedReadOnlyScenarioMemory mapped_current_memory(
ScenarioScope::kCurrentProcess,
shared_memory->DuplicateReadOnlyRegion());
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kCurrentProcess)
->load(std::memory_order_relaxed),
LoadingScenario::kFocusedPageLoading);
// Updates should be visible in both mappings.
shared_memory->WritableRef().loading.store(
LoadingScenario::kVisiblePageLoading, std::memory_order_relaxed);
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kGlobal)
->load(std::memory_order_relaxed),
LoadingScenario::kVisiblePageLoading);
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kCurrentProcess)
->load(std::memory_order_relaxed),
LoadingScenario::kVisiblePageLoading);
}
// After going out of scope, the memory is unmapped and GetLoadingScenario
// should see default values again.
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kCurrentProcess)
->load(std::memory_order_relaxed),
LoadingScenario::kNoPageLoading);
EXPECT_EQ(GetLoadingScenario(ScenarioScope::kGlobal)
->load(std::memory_order_relaxed),
LoadingScenario::kNoPageLoading);
}
TEST(PerformanceScenariosTest, SharedAtomicRef) {
// Create and map shared memory.
auto shared_memory = base::StructuredSharedMemory<ScenarioState>::Create();
ASSERT_TRUE(shared_memory.has_value());
auto read_only_mapping =
base::StructuredSharedMemory<ScenarioState>::MapReadOnlyRegion(
shared_memory->DuplicateReadOnlyRegion());
ASSERT_TRUE(read_only_mapping.has_value());
// Store pointers to the atomics in the shared memory for later comparison.
const std::atomic<LoadingScenario>* loading_ptr =
&(read_only_mapping->ReadOnlyRef().loading);
const std::atomic<InputScenario>* input_ptr =
&(read_only_mapping->ReadOnlyRef().input);
// Transfer ownership of the mapping to a scoped_refptr.
auto mapping_ptr = base::MakeRefCounted<RefCountedScenarioMapping>(
std::move(read_only_mapping.value()));
SharedAtomicRef<LoadingScenario> loading_ref(
mapping_ptr, mapping_ptr->data.ReadOnlyRef().loading);
SharedAtomicRef<InputScenario> input_ref(
mapping_ptr, mapping_ptr->data.ReadOnlyRef().input);
// The SharedAtomicRef's should keep the mapping alive.
mapping_ptr.reset();
shared_memory->WritableRef().loading.store(
LoadingScenario::kBackgroundPageLoading, std::memory_order_relaxed);
shared_memory->WritableRef().input.store(InputScenario::kNoInput,
std::memory_order_relaxed);
// get()
EXPECT_EQ(loading_ref.get(), loading_ptr);
EXPECT_EQ(input_ref.get(), input_ptr);
// operator*
EXPECT_EQ(*loading_ref, *loading_ptr);
EXPECT_EQ(*input_ref, *input_ptr);
// operator->
EXPECT_EQ(loading_ref->load(std::memory_order_relaxed),
LoadingScenario::kBackgroundPageLoading);
EXPECT_EQ(input_ref->load(std::memory_order_relaxed),
InputScenario::kNoInput);
}
TEST_P(PerformanceScenariosAllLoadingScenariosTest, EmptyScenarioPattern) {
// Nothing matches the pattern.
static ScenarioPattern kEmptyScenarioPattern{};
EXPECT_TRUE(ScenariosMatch(GetParam(), InputScenario::kNoInput,
kEmptyScenarioPattern));
EXPECT_TRUE(ScenariosMatch(GetParam(), InputScenario::kTyping,
kEmptyScenarioPattern));
}
TEST_P(PerformanceScenariosAllLoadingScenariosTest, InputScenarioPattern) {
// kNoInput matches the pattern, loading scenarios are ignored.
static ScenarioPattern kInputScenarioPattern{
.input = {InputScenario::kNoInput},
};
EXPECT_TRUE(ScenariosMatch(GetParam(), InputScenario::kNoInput,
kInputScenarioPattern));
EXPECT_FALSE(ScenariosMatch(GetParam(), InputScenario::kTyping,
kInputScenarioPattern));
}
TEST_P(PerformanceScenariosAllInputScenariosTest, LoadingScenarioPattern) {
// Only kNoPageLoading matches the pattern, input scenarios are ignored.
static ScenarioPattern kNotLoadingScenarioPattern{
.loading = {LoadingScenario::kNoPageLoading},
};
EXPECT_TRUE(ScenariosMatch(LoadingScenario::kNoPageLoading, GetParam(),
kNotLoadingScenarioPattern));
EXPECT_FALSE(ScenariosMatch(LoadingScenario::kBackgroundPageLoading,
GetParam(), kNotLoadingScenarioPattern));
EXPECT_FALSE(ScenariosMatch(LoadingScenario::kVisiblePageLoading, GetParam(),
kNotLoadingScenarioPattern));
EXPECT_FALSE(ScenariosMatch(LoadingScenario::kFocusedPageLoading, GetParam(),
kNotLoadingScenarioPattern));
// Loading background pages match the pattern, input scenarios are ignored.
static ScenarioPattern kBackgroundLoadingScenarioPattern{
.loading = {LoadingScenario::kNoPageLoading,
LoadingScenario::kBackgroundPageLoading},
};
EXPECT_TRUE(ScenariosMatch(LoadingScenario::kNoPageLoading, GetParam(),
kBackgroundLoadingScenarioPattern));
EXPECT_TRUE(ScenariosMatch(LoadingScenario::kBackgroundPageLoading,
GetParam(), kBackgroundLoadingScenarioPattern));
EXPECT_FALSE(ScenariosMatch(LoadingScenario::kVisiblePageLoading, GetParam(),
kBackgroundLoadingScenarioPattern));
EXPECT_FALSE(ScenariosMatch(LoadingScenario::kFocusedPageLoading, GetParam(),
kBackgroundLoadingScenarioPattern));
// Loading non-focused pages match the pattern, input scenarios are ignored.
static ScenarioPattern kNonFocusedLoadingScenarioPattern{
.loading = {LoadingScenario::kNoPageLoading,
LoadingScenario::kBackgroundPageLoading,
LoadingScenario::kVisiblePageLoading},
};
EXPECT_TRUE(ScenariosMatch(LoadingScenario::kNoPageLoading, GetParam(),
kNonFocusedLoadingScenarioPattern));
EXPECT_TRUE(ScenariosMatch(LoadingScenario::kBackgroundPageLoading,
GetParam(), kNonFocusedLoadingScenarioPattern));
EXPECT_TRUE(ScenariosMatch(LoadingScenario::kVisiblePageLoading, GetParam(),
kNonFocusedLoadingScenarioPattern));
EXPECT_FALSE(ScenariosMatch(LoadingScenario::kFocusedPageLoading, GetParam(),
kNonFocusedLoadingScenarioPattern));
}
// By default, scenarios are only idle with no foreground loading and no input.
// If one of these tests fails, check if the definition of kDefaultIdleScenarios
// has changed.
TEST(PerformanceScenariosTest, DefaultIdleScenariosNoInput) {
EXPECT_TRUE(ScenariosMatch(LoadingScenario::kNoPageLoading,
InputScenario::kNoInput, kDefaultIdleScenarios));
EXPECT_TRUE(ScenariosMatch(LoadingScenario::kBackgroundPageLoading,
InputScenario::kNoInput, kDefaultIdleScenarios));
EXPECT_FALSE(ScenariosMatch(LoadingScenario::kVisiblePageLoading,
InputScenario::kNoInput, kDefaultIdleScenarios));
EXPECT_FALSE(ScenariosMatch(LoadingScenario::kFocusedPageLoading,
InputScenario::kNoInput, kDefaultIdleScenarios));
}
TEST_P(PerformanceScenariosAllLoadingScenariosTest,
DefaultIdleScenariosWithInput) {
EXPECT_FALSE(ScenariosMatch(GetParam(), InputScenario::kTyping,
kDefaultIdleScenarios));
}
} // namespace
} // namespace performance_scenarios
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