chrome/browser/metrics/thread_watcher_android_unittest.cc

   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_->StartAndWaitForTesting();
  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(*base::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   // ThreadWatcherList::StartWatchingAll() creates g_thread_watcher_observer_.
  75   // This should be released by ThreadWatcherList::StopWatchingAll() in the end
  76   // of test to not affect other test cases.
  77   ThreadWatcherList::StopWatchingAll();
  78 }