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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/screenlock_monitor/screenlock_monitor.h"
#include <array>
#include "base/memory/raw_ptr.h"
#include "base/run_loop.h"
#include "base/task/current_thread.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/task_environment.h"
#include "content/browser/screenlock_monitor/screenlock_monitor_source.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
class ScreenlockMonitorTestSource : public ScreenlockMonitorSource {
public:
ScreenlockMonitorTestSource() {
DCHECK(base::CurrentThread::Get())
<< "ScreenlockMonitorTestSource requires a MessageLoop.";
}
~ScreenlockMonitorTestSource() override = default;
void GenerateScreenLockedEvent() {
ProcessScreenlockEvent(SCREEN_LOCK_EVENT);
base::RunLoop().RunUntilIdle();
}
void GenerateScreenUnlockedEvent() {
ProcessScreenlockEvent(SCREEN_UNLOCK_EVENT);
base::RunLoop().RunUntilIdle();
}
};
class ScreenlockMonitorTestObserver : public ScreenlockObserver {
public:
ScreenlockMonitorTestObserver() : is_screen_locked_(false) {}
~ScreenlockMonitorTestObserver() override = default;
// ScreenlockObserver callbacks.
void OnScreenLocked() override { is_screen_locked_ = true; }
void OnScreenUnlocked() override { is_screen_locked_ = false; }
bool IsScreenLocked() { return is_screen_locked_; }
private:
bool is_screen_locked_;
};
class ScreenlockMonitorTest : public testing::Test {
public:
ScreenlockMonitorTest(const ScreenlockMonitorTest&) = delete;
ScreenlockMonitorTest& operator=(const ScreenlockMonitorTest&) = delete;
protected:
ScreenlockMonitorTest() {
screenlock_monitor_source_ = new ScreenlockMonitorTestSource();
screenlock_monitor_ = std::make_unique<ScreenlockMonitor>(
std::unique_ptr<ScreenlockMonitorSource>(screenlock_monitor_source_));
}
~ScreenlockMonitorTest() override { screenlock_monitor_source_ = nullptr; }
protected:
raw_ptr<ScreenlockMonitorTestSource> screenlock_monitor_source_;
std::unique_ptr<ScreenlockMonitor> screenlock_monitor_;
base::test::SingleThreadTaskEnvironment task_environment_{
base::test::SingleThreadTaskEnvironment::TimeSource::MOCK_TIME};
};
TEST_F(ScreenlockMonitorTest, ScreenlockNotifications) {
const int kObservers = 5;
std::array<ScreenlockMonitorTestObserver, kObservers> observers;
for (int index = 0; index < kObservers; ++index)
screenlock_monitor_->AddObserver(&observers[index]);
// Pretend screen is locked.
screenlock_monitor_source_->GenerateScreenLockedEvent();
// Ensure all observers were notified of the event
for (int index = 0; index < kObservers; ++index)
EXPECT_TRUE(observers[index].IsScreenLocked());
// Pretend screen is unlocked.
screenlock_monitor_source_->GenerateScreenUnlockedEvent();
// Ensure all observers were notified of the event
for (int index = 0; index < kObservers; ++index)
EXPECT_FALSE(observers[index].IsScreenLocked());
}
TEST_F(ScreenlockMonitorTest, HistogramTest) {
base::HistogramTester histogram_tester;
base::TimeDelta time_to_advance = base::Seconds(10);
task_environment_.AdvanceClock(time_to_advance);
screenlock_monitor_source_->GenerateScreenLockedEvent();
// We should not log any metrics for the first lock event.
histogram_tester.ExpectTotalCount("ScreenLocker.Unlocked.Duration", 0);
histogram_tester.ExpectTotalCount("ScreenLocker.Locked.Duration", 0);
time_to_advance = base::Seconds(11);
task_environment_.AdvanceClock(time_to_advance);
screenlock_monitor_source_->GenerateScreenUnlockedEvent();
// A Locked event with duration should be logged on unlock.
histogram_tester.ExpectTotalCount("ScreenLocker.Unlocked.Duration", 0);
histogram_tester.ExpectTotalCount("ScreenLocker.Locked.Duration", 1);
histogram_tester.ExpectUniqueTimeSample("ScreenLocker.Locked.Duration",
time_to_advance, 1);
time_to_advance = base::Seconds(12);
task_environment_.AdvanceClock(time_to_advance);
screenlock_monitor_source_->GenerateScreenLockedEvent();
// A Unlocked event with duration should be logged on lock.
histogram_tester.ExpectTotalCount("ScreenLocker.Unlocked.Duration", 1);
histogram_tester.ExpectTotalCount("ScreenLocker.Locked.Duration", 1);
histogram_tester.ExpectUniqueTimeSample("ScreenLocker.Unlocked.Duration",
time_to_advance, 1);
}
} // namespace content
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