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// Copyright 2013 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/power_monitor/power_monitor.h"
#include "base/test/power_monitor_test.h"
#include "base/test/task_environment.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
namespace base {
namespace test {
class PowerMonitorTest : public testing::Test {
public:
PowerMonitorTest(const PowerMonitorTest&) = delete;
PowerMonitorTest& operator=(const PowerMonitorTest&) = delete;
protected:
PowerMonitorTest() = default;
void PowerMonitorInitialize() { power_monitor_source_.emplace(); }
ScopedPowerMonitorTestSource& source() {
return power_monitor_source_.value();
}
private:
TaskEnvironment task_environment_;
absl::optional<ScopedPowerMonitorTestSource> power_monitor_source_;
};
// PowerMonitorSource is tightly coupled with the PowerMonitor, so this test
// covers both classes.
TEST_F(PowerMonitorTest, PowerNotifications) {
const int kObservers = 5;
PowerMonitorInitialize();
PowerMonitorTestObserver observers[kObservers];
for (auto& index : observers) {
PowerMonitor::AddPowerSuspendObserver(&index);
PowerMonitor::AddPowerStateObserver(&index);
PowerMonitor::AddPowerThermalObserver(&index);
}
// Sending resume when not suspended should have no effect.
source().GenerateResumeEvent();
EXPECT_EQ(observers[0].resumes(), 0);
// Pretend we suspended.
source().GenerateSuspendEvent();
// Ensure all observers were notified of the event
for (const auto& index : observers)
EXPECT_EQ(index.suspends(), 1);
// Send a second suspend notification. This should be suppressed.
source().GenerateSuspendEvent();
EXPECT_EQ(observers[0].suspends(), 1);
// Pretend we were awakened.
source().GenerateResumeEvent();
EXPECT_EQ(observers[0].resumes(), 1);
// Send a duplicate resume notification. This should be suppressed.
source().GenerateResumeEvent();
EXPECT_EQ(observers[0].resumes(), 1);
// Pretend the device has gone on battery power
source().GeneratePowerStateEvent(true);
EXPECT_EQ(observers[0].power_state_changes(), 1);
EXPECT_EQ(observers[0].last_power_state(), true);
// Repeated indications the device is on battery power should be suppressed.
source().GeneratePowerStateEvent(true);
EXPECT_EQ(observers[0].power_state_changes(), 1);
// Pretend the device has gone off battery power
source().GeneratePowerStateEvent(false);
EXPECT_EQ(observers[0].power_state_changes(), 2);
EXPECT_EQ(observers[0].last_power_state(), false);
// Repeated indications the device is off battery power should be suppressed.
source().GeneratePowerStateEvent(false);
EXPECT_EQ(observers[0].power_state_changes(), 2);
// Send speed limit change notifications.
source().GenerateSpeedLimitEvent(666);
EXPECT_EQ(observers[0].speed_limit_changes(), 1);
EXPECT_EQ(observers[0].last_speed_limit(), 666);
source().GenerateSpeedLimitEvent(777);
EXPECT_EQ(observers[0].speed_limit_changes(), 2);
EXPECT_EQ(observers[0].last_speed_limit(), 777);
EXPECT_EQ(observers[0].thermal_state_changes(), 0);
// Send a power thermal change notification.
source().GenerateThermalThrottlingEvent(
PowerThermalObserver::DeviceThermalState::kNominal);
EXPECT_EQ(observers[0].thermal_state_changes(), 1);
EXPECT_EQ(observers[0].last_thermal_state(),
PowerThermalObserver::DeviceThermalState::kNominal);
// Send a duplicate power thermal notification. This should be suppressed.
source().GenerateThermalThrottlingEvent(
PowerThermalObserver::DeviceThermalState::kNominal);
EXPECT_EQ(observers[0].thermal_state_changes(), 1);
// Send a different power thermal change notification.
source().GenerateThermalThrottlingEvent(
PowerThermalObserver::DeviceThermalState::kFair);
EXPECT_EQ(observers[0].thermal_state_changes(), 2);
EXPECT_EQ(observers[0].last_thermal_state(),
PowerThermalObserver::DeviceThermalState::kFair);
for (auto& index : observers) {
PowerMonitor::RemovePowerSuspendObserver(&index);
PowerMonitor::RemovePowerStateObserver(&index);
PowerMonitor::RemovePowerThermalObserver(&index);
}
}
TEST_F(PowerMonitorTest, ThermalThrottling) {
PowerMonitorTestObserver observer;
PowerMonitor::AddPowerThermalObserver(&observer);
PowerMonitorInitialize();
constexpr PowerThermalObserver::DeviceThermalState kThermalStates[] = {
PowerThermalObserver::DeviceThermalState::kUnknown,
PowerThermalObserver::DeviceThermalState::kNominal,
PowerThermalObserver::DeviceThermalState::kFair,
PowerThermalObserver::DeviceThermalState::kSerious,
PowerThermalObserver::DeviceThermalState::kCritical};
for (const auto state : kThermalStates) {
source().GenerateThermalThrottlingEvent(state);
EXPECT_EQ(state, source().GetCurrentThermalState());
EXPECT_EQ(observer.last_thermal_state(), state);
}
PowerMonitor::RemovePowerThermalObserver(&observer);
}
TEST_F(PowerMonitorTest, AddPowerSuspendObserverBeforeAndAfterInitialization) {
PowerMonitorTestObserver observer1;
PowerMonitorTestObserver observer2;
// An observer is added before the PowerMonitor initialization.
PowerMonitor::AddPowerSuspendObserver(&observer1);
PowerMonitorInitialize();
// An observer is added after the PowerMonitor initialization.
PowerMonitor::AddPowerSuspendObserver(&observer2);
// Simulate suspend/resume notifications.
source().GenerateSuspendEvent();
EXPECT_EQ(observer1.suspends(), 1);
EXPECT_EQ(observer2.suspends(), 1);
EXPECT_EQ(observer1.resumes(), 0);
EXPECT_EQ(observer2.resumes(), 0);
source().GenerateResumeEvent();
EXPECT_EQ(observer1.resumes(), 1);
EXPECT_EQ(observer2.resumes(), 1);
PowerMonitor::RemovePowerSuspendObserver(&observer1);
PowerMonitor::RemovePowerSuspendObserver(&observer2);
}
TEST_F(PowerMonitorTest, AddPowerStateObserverBeforeAndAfterInitialization) {
PowerMonitorTestObserver observer1;
PowerMonitorTestObserver observer2;
// An observer is added before the PowerMonitor initialization.
PowerMonitor::AddPowerStateObserver(&observer1);
PowerMonitorInitialize();
// An observer is added after the PowerMonitor initialization.
PowerMonitor::AddPowerStateObserver(&observer2);
// Simulate power state transitions (e.g. battery on/off).
EXPECT_EQ(observer1.power_state_changes(), 0);
EXPECT_EQ(observer2.power_state_changes(), 0);
source().GeneratePowerStateEvent(true);
EXPECT_EQ(observer1.power_state_changes(), 1);
EXPECT_EQ(observer2.power_state_changes(), 1);
source().GeneratePowerStateEvent(false);
EXPECT_EQ(observer1.power_state_changes(), 2);
EXPECT_EQ(observer2.power_state_changes(), 2);
PowerMonitor::RemovePowerStateObserver(&observer1);
PowerMonitor::RemovePowerStateObserver(&observer2);
}
TEST_F(PowerMonitorTest, SuspendStateReturnedFromAddObserver) {
PowerMonitorTestObserver observer1;
PowerMonitorTestObserver observer2;
PowerMonitorInitialize();
EXPECT_FALSE(
PowerMonitor::AddPowerSuspendObserverAndReturnSuspendedState(&observer1));
source().GenerateSuspendEvent();
EXPECT_TRUE(
PowerMonitor::AddPowerSuspendObserverAndReturnSuspendedState(&observer2));
EXPECT_EQ(observer1.suspends(), 1);
EXPECT_EQ(observer2.suspends(), 0);
EXPECT_EQ(observer1.resumes(), 0);
EXPECT_EQ(observer2.resumes(), 0);
PowerMonitor::RemovePowerSuspendObserver(&observer1);
PowerMonitor::RemovePowerSuspendObserver(&observer2);
}
TEST_F(PowerMonitorTest, PowerStateReturnedFromAddObserver) {
PowerMonitorTestObserver observer1;
PowerMonitorTestObserver observer2;
PowerMonitorInitialize();
// An observer is added before the on-battery notification.
EXPECT_FALSE(
PowerMonitor::AddPowerStateObserverAndReturnOnBatteryState(&observer1));
source().GeneratePowerStateEvent(true);
// An observer is added after the on-battery notification.
EXPECT_TRUE(
PowerMonitor::AddPowerStateObserverAndReturnOnBatteryState(&observer2));
EXPECT_EQ(observer1.power_state_changes(), 1);
EXPECT_EQ(observer2.power_state_changes(), 0);
PowerMonitor::RemovePowerStateObserver(&observer1);
PowerMonitor::RemovePowerStateObserver(&observer2);
}
} // namespace test
} // namespace base
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