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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/ios/scoped_critical_action.h"
#include <memory>
#include "base/strings/string_piece.h"
#include "base/test/task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"
namespace base::ios {
namespace {
class ScopedCriticalActionTest : public PlatformTest {
protected:
ScopedCriticalActionTest() {
ScopedCriticalAction::ClearNumActiveBackgroundTasksForTest();
}
~ScopedCriticalActionTest() override = default;
base::test::TaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
};
TEST_F(ScopedCriticalActionTest, ShouldStartBackgroundTaskWhenConstructed) {
ASSERT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
ScopedCriticalAction scoped_critical_action("name");
EXPECT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
}
TEST_F(ScopedCriticalActionTest, ShouldEndBackgroundTaskWhenDestructed) {
ScopedCriticalAction::ClearNumActiveBackgroundTasksForTest();
ASSERT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
auto scoped_critical_action = std::make_unique<ScopedCriticalAction>("name");
ASSERT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action.reset();
EXPECT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
}
TEST_F(ScopedCriticalActionTest, ShouldUseMultipleBackgroundTasks) {
ScopedCriticalAction::ClearNumActiveBackgroundTasksForTest();
ASSERT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
auto scoped_critical_action1 =
std::make_unique<ScopedCriticalAction>("name1");
ASSERT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
auto scoped_critical_action2 =
std::make_unique<ScopedCriticalAction>("name2");
EXPECT_EQ(2, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action1.reset();
EXPECT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action2.reset();
EXPECT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
}
TEST_F(ScopedCriticalActionTest, ShouldReuseBackgroundTasksForSameName) {
ScopedCriticalAction::ClearNumActiveBackgroundTasksForTest();
ASSERT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
auto scoped_critical_action1 = std::make_unique<ScopedCriticalAction>("name");
ASSERT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
auto scoped_critical_action2 = std::make_unique<ScopedCriticalAction>("name");
EXPECT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action1.reset();
EXPECT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action2.reset();
EXPECT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
}
TEST_F(ScopedCriticalActionTest,
ShouldNotReuseBackgroundTasksForSameNameIfTimeDifferenceLarge) {
ScopedCriticalAction::ClearNumActiveBackgroundTasksForTest();
ASSERT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
auto scoped_critical_action1 = std::make_unique<ScopedCriticalAction>("name");
ASSERT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
// Mimic advancing time more than 3 seconds (kMaxTaskReuseDelay).
task_environment_.FastForwardBy(base::Seconds(4));
auto scoped_critical_action2 = std::make_unique<ScopedCriticalAction>("name");
EXPECT_EQ(2, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action1.reset();
EXPECT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action2.reset();
EXPECT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
}
TEST_F(ScopedCriticalActionTest,
ShouldReuseBackgroundTasksForSameNameIfTimeDifferenceSmall) {
ScopedCriticalAction::ClearNumActiveBackgroundTasksForTest();
ASSERT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
auto scoped_critical_action1 = std::make_unique<ScopedCriticalAction>("name");
ASSERT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
// Mimic advancing time less than 3 seconds (kMaxTaskReuseDelay).
task_environment_.FastForwardBy(base::Seconds(2));
auto scoped_critical_action2 = std::make_unique<ScopedCriticalAction>("name");
EXPECT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action1.reset();
EXPECT_EQ(1, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
scoped_critical_action2.reset();
EXPECT_EQ(0, ScopedCriticalAction::GetNumActiveBackgroundTasksForTest());
}
} // namespace
} // namespace base::ios
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