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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 
      6 #include "base/android/application_status_listener.h"
      7 #include "base/run_loop.h"
      8 #include "base/synchronization/waitable_event.h"
      9 #include "chrome/browser/metrics/thread_watcher.h"
     10 #include "chrome/browser/metrics/thread_watcher_android.h"
     11 #include "content/public/test/test_browser_thread.h"
     12 #include "testing/gtest/include/gtest/gtest.h"
     13 
     14 using content::BrowserThread;
     15 
     16 namespace {
     17 void OnThreadWatcherTask(base::WaitableEvent* event) {
     18   event->Signal();
     19 }
     20 
     21 void PostAndWaitForWatchdogThread(base::WaitableEvent* event) {
     22   WatchDogThread::PostDelayedTask(
     23       FROM_HERE,
     24       base::Bind(&OnThreadWatcherTask, event),
     25       base::TimeDelta::FromSeconds(0));
     26 
     27   EXPECT_TRUE(event->TimedWait(base::TimeDelta::FromSeconds(1)));
     28 }
     29 
     30 void NotifyApplicationStateChange(base::android::ApplicationState state) {
     31   base::WaitableEvent watchdog_thread_event(false, false);
     32 
     33   base::android::ApplicationStatusListener::NotifyApplicationStateChange(state);
     34   base::RunLoop().RunUntilIdle();
     35 
     36   PostAndWaitForWatchdogThread(&watchdog_thread_event);
     37 }
     38 
     39 }  // namespace
     40 
     41 TEST(ThreadWatcherAndroidTest, ApplicationStatusNotification) {
     42   // Do not delay the ThreadWatcherList initialization for this test.
     43   ThreadWatcherList::g_initialize_delay_seconds = 0;
     44 
     45   base::MessageLoopForUI message_loop_for_ui;
     46   content::TestBrowserThread ui_thread(BrowserThread::UI, &message_loop_for_ui);
     47 
     48 
     49   scoped_ptr<WatchDogThread> watchdog_thread_(new WatchDogThread());
     50   watchdog_thread_->Start();
     51 
     52   EXPECT_FALSE(ThreadWatcherList::g_thread_watcher_list_);
     53 
     54 
     55   // Register, and notify the application has just started,
     56   // and ensure the thread watcher list is created.
     57   ThreadWatcherAndroid::RegisterApplicationStatusListener();
     58   ThreadWatcherList::StartWatchingAll(*CommandLine::ForCurrentProcess());
     59   NotifyApplicationStateChange(
     60       base::android::APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
     61   EXPECT_TRUE(ThreadWatcherList::g_thread_watcher_list_);
     62 
     63   // Notify the application has been stopped, and ensure the thread watcher list
     64   // has been destroyed.
     65   NotifyApplicationStateChange(
     66       base::android::APPLICATION_STATE_HAS_STOPPED_ACTIVITIES);
     67   EXPECT_FALSE(ThreadWatcherList::g_thread_watcher_list_);
     68 
     69   // And again the last transition, STOPPED -> STARTED.
     70   NotifyApplicationStateChange(
     71       base::android::APPLICATION_STATE_HAS_RUNNING_ACTIVITIES);
     72   EXPECT_TRUE(ThreadWatcherList::g_thread_watcher_list_);
     73 }
     74