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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/application_status_listener.h"
#include <memory>
#include "base/bind.h"
#include "base/callback_forward.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/thread.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace android {
namespace {
using base::android::ScopedJavaLocalRef;
// An invalid ApplicationState value.
const ApplicationState kInvalidApplicationState =
static_cast<ApplicationState>(100);
// Used to generate a callback that stores the new state at a given location.
void StoreStateTo(ApplicationState* target, ApplicationState state) {
*target = state;
}
void RunTasksUntilIdle() {
RunLoop run_loop;
run_loop.RunUntilIdle();
}
// Shared state for the multi-threaded test.
// This uses a thread to register for events and listen to them, while state
// changes are forced on the main thread.
class MultiThreadedTest {
public:
MultiThreadedTest()
: state_(kInvalidApplicationState),
event_(WaitableEvent::ResetPolicy::AUTOMATIC,
WaitableEvent::InitialState::NOT_SIGNALED),
thread_("ApplicationStatusTest thread"),
main_() {}
void Run() {
// Start the thread and tell it to register for events.
thread_.Start();
thread_.task_runner()->PostTask(
FROM_HERE, base::Bind(&MultiThreadedTest::RegisterThreadForEvents,
base::Unretained(this)));
// Wait for its completion.
event_.Wait();
// Change state, then wait for the thread to modify state.
ApplicationStatusListener::NotifyApplicationStateChange(
APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
event_.Wait();
EXPECT_EQ(APPLICATION_STATE_HAS_RUNNING_ACTIVITIES, state_);
// Again
ApplicationStatusListener::NotifyApplicationStateChange(
APPLICATION_STATE_HAS_DESTROYED_ACTIVITIES);
event_.Wait();
EXPECT_EQ(APPLICATION_STATE_HAS_DESTROYED_ACTIVITIES, state_);
}
private:
void ExpectOnThread() {
EXPECT_EQ(thread_.message_loop(), base::MessageLoop::current());
}
void RegisterThreadForEvents() {
ExpectOnThread();
listener_.reset(new ApplicationStatusListener(base::Bind(
&MultiThreadedTest::StoreStateAndSignal, base::Unretained(this))));
EXPECT_TRUE(listener_.get());
event_.Signal();
}
void StoreStateAndSignal(ApplicationState state) {
ExpectOnThread();
state_ = state;
event_.Signal();
}
ApplicationState state_;
base::WaitableEvent event_;
base::Thread thread_;
base::MessageLoop main_;
std::unique_ptr<ApplicationStatusListener> listener_;
};
} // namespace
TEST(ApplicationStatusListenerTest, SingleThread) {
MessageLoop message_loop;
ApplicationState result = kInvalidApplicationState;
// Create a new listener that stores the new state into |result| on every
// state change.
ApplicationStatusListener listener(
base::Bind(&StoreStateTo, base::Unretained(&result)));
EXPECT_EQ(kInvalidApplicationState, result);
ApplicationStatusListener::NotifyApplicationStateChange(
APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
RunTasksUntilIdle();
EXPECT_EQ(APPLICATION_STATE_HAS_RUNNING_ACTIVITIES, result);
ApplicationStatusListener::NotifyApplicationStateChange(
APPLICATION_STATE_HAS_DESTROYED_ACTIVITIES);
RunTasksUntilIdle();
EXPECT_EQ(APPLICATION_STATE_HAS_DESTROYED_ACTIVITIES, result);
}
TEST(ApplicationStatusListenerTest, TwoThreads) {
MultiThreadedTest test;
test.Run();
}
} // namespace android
} // namespace base
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