content: /*
   * Copyright 2020 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.google.android.exoplayer2.analytics;
  
  import static com.google.android.exoplayer2.robolectric.TestPlayerRunHelper.runUntilPendingCommandsAreFullyHandled;
  import static com.google.common.truth.Truth.assertThat;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.never;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.verifyNoMoreInteractions;
  
  import androidx.annotation.Nullable;
  import androidx.test.core.app.ApplicationProvider;
  import androidx.test.ext.junit.runners.AndroidJUnit4;
  import com.google.android.exoplayer2.ExoPlayer;
  import com.google.android.exoplayer2.MediaItem;
  import com.google.android.exoplayer2.PlaybackParameters;
  import com.google.android.exoplayer2.Player;
  import com.google.android.exoplayer2.robolectric.TestPlayerRunHelper;
  import com.google.android.exoplayer2.source.MediaSource;
  import com.google.android.exoplayer2.testutil.FakeMediaSource;
  import com.google.android.exoplayer2.testutil.FakeTimeline;
  import com.google.android.exoplayer2.testutil.TestExoPlayerBuilder;
  import com.google.common.collect.ImmutableList;
  import java.util.stream.Collectors;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.mockito.ArgumentCaptor;
  import org.robolectric.shadows.ShadowLooper;
  
  /** Unit test for {@link PlaybackStatsListener}. */
  @RunWith(AndroidJUnit4.class)
  public final class PlaybackStatsListenerTest {
  
    private ExoPlayer player;
  
    @Before
    public void setUp() {
      player = new TestExoPlayerBuilder(ApplicationProvider.getApplicationContext()).build();
    }
  
    @After
    public void tearDown() {
      player.release();
    }
  
    @Test
    public void events_duringInitialIdleState_dontCreateNewPlaybackStats() throws Exception {
      PlaybackStatsListener playbackStatsListener =
          new PlaybackStatsListener(/* keepHistory= */ true, /* callback= */ null);
      player.addAnalyticsListener(playbackStatsListener);
  
      player.seekTo(/* positionMs= */ 1234);
      runUntilPendingCommandsAreFullyHandled(player);
      player.setPlaybackParameters(new PlaybackParameters(/* speed= */ 2f));
      runUntilPendingCommandsAreFullyHandled(player);
      player.play();
      runUntilPendingCommandsAreFullyHandled(player);
  
      assertThat(playbackStatsListener.getPlaybackStats()).isNull();
    }
  
    @Test
    public void stateChangeEvent_toEndedWithEmptyTimeline_doesNotCreateInitialPlaybackStats()
        throws Exception {
      PlaybackStatsListener.Callback callback = mock(PlaybackStatsListener.Callback.class);
      PlaybackStatsListener playbackStatsListener =
          new PlaybackStatsListener(/* keepHistory= */ true, callback);
      player.addAnalyticsListener(playbackStatsListener);
  
      player.prepare();
      runUntilPendingCommandsAreFullyHandled(player);
  
      assertThat(playbackStatsListener.getPlaybackStats()).isNull();
      verifyNoMoreInteractions(callback);
    }
  
    @Test
    public void timelineChangeEvent_toNonEmpty_createsInitialPlaybackStats() throws Exception {
      PlaybackStatsListener playbackStatsListener =
          new PlaybackStatsListener(/* keepHistory= */ true, /* callback= */ null);
      player.addAnalyticsListener(playbackStatsListener);
  
      player.setMediaItem(MediaItem.fromUri("http://test.org"));
      runUntilPendingCommandsAreFullyHandled(player);
  
      assertThat(playbackStatsListener.getPlaybackStats()).isNotNull();
    }
  
    @Test
    public void playback_withKeepHistory_updatesStats() throws Exception {
      PlaybackStatsListener playbackStatsListener =
          new PlaybackStatsListener(/* keepHistory= */ true, /* callback= */ null);
      player.addAnalyticsListener(playbackStatsListener);
  
      player.setMediaSource(new FakeMediaSource(new FakeTimeline(/* windowCount= */ 1)));
      player.prepare();
      player.play();
      TestPlayerRunHelper.runUntilPlaybackState(player, Player.STATE_ENDED);
      runUntilPendingCommandsAreFullyHandled(player);
  
      @Nullable PlaybackStats playbackStats = playbackStatsListener.getPlaybackStats();
      assertThat(playbackStats).isNotNull();
      assertThat(playbackStats.endedCount).isEqualTo(1);
    }
  
    @Test
    public void playback_withoutKeepHistory_updatesStats() throws Exception {
      PlaybackStatsListener playbackStatsListener =
          new PlaybackStatsListener(/* keepHistory= */ false, /* callback= */ null);
      player.addAnalyticsListener(playbackStatsListener);
  
      player.setMediaSource(new FakeMediaSource(new FakeTimeline(/* windowCount= */ 1)));
      player.prepare();
      player.play();
      TestPlayerRunHelper.runUntilPlaybackState(player, Player.STATE_ENDED);
      runUntilPendingCommandsAreFullyHandled(player);
  
      @Nullable PlaybackStats playbackStats = playbackStatsListener.getPlaybackStats();
      assertThat(playbackStats).isNotNull();
      assertThat(playbackStats.endedCount).isEqualTo(1);
    }
  
    @Test
    public void finishedSession_callsCallback() throws Exception {
      PlaybackStatsListener.Callback callback = mock(PlaybackStatsListener.Callback.class);
      PlaybackStatsListener playbackStatsListener =
          new PlaybackStatsListener(/* keepHistory= */ true, callback);
      player.addAnalyticsListener(playbackStatsListener);
  
      // Create session with some events and finish it by removing it from the playlist.
      player.setMediaSource(new FakeMediaSource(new FakeTimeline(/* windowCount= */ 1)));
      player.prepare();
      runUntilPendingCommandsAreFullyHandled(player);
      verify(callback, never()).onPlaybackStatsReady(any(), any());
      player.clearMediaItems();
      runUntilPendingCommandsAreFullyHandled(player);
  
      verify(callback).onPlaybackStatsReady(any(), any());
    }
  
    @Test
    public void playlistClear_callsAllPendingCallbacks() throws Exception {
      PlaybackStatsListener.Callback callback = mock(PlaybackStatsListener.Callback.class);
      PlaybackStatsListener playbackStatsListener =
          new PlaybackStatsListener(/* keepHistory= */ true, callback);
      player.addAnalyticsListener(playbackStatsListener);
  
      MediaSource mediaSource = new FakeMediaSource(new FakeTimeline(/* windowCount= */ 1));
      player.setMediaSources(ImmutableList.of(mediaSource, mediaSource));
      player.prepare();
      TestPlayerRunHelper.runUntilPlaybackState(player, Player.STATE_READY);
      // Play close to the end of the first item to ensure the second session is already created, but
      // the first one isn't finished yet.
      TestPlayerRunHelper.playUntilPosition(
          player, /* windowIndex= */ 0, /* positionMs= */ player.getDuration());
      runUntilPendingCommandsAreFullyHandled(player);
      player.clearMediaItems();
      ShadowLooper.idleMainLooper();
  
      ArgumentCaptor<AnalyticsListener.EventTime> eventTimeCaptor =
          ArgumentCaptor.forClass(AnalyticsListener.EventTime.class);
      verify(callback, times(2)).onPlaybackStatsReady(eventTimeCaptor.capture(), any());
      assertThat(
              eventTimeCaptor.getAllValues().stream()
                  .map(eventTime -> eventTime.windowIndex)
                  .collect(Collectors.toList()))
          .containsExactly(0, 1);
    }
  
    @Test
    public void playerRelease_callsAllPendingCallbacks() throws Exception {
      PlaybackStatsListener.Callback callback = mock(PlaybackStatsListener.Callback.class);
      PlaybackStatsListener playbackStatsListener =
          new PlaybackStatsListener(/* keepHistory= */ true, callback);
      player.addAnalyticsListener(playbackStatsListener);
  
      MediaSource mediaSource = new FakeMediaSource(new FakeTimeline(/* windowCount= */ 1));
      player.setMediaSources(ImmutableList.of(mediaSource, mediaSource));
      player.prepare();
      TestPlayerRunHelper.runUntilPlaybackState(player, Player.STATE_READY);
      // Play close to the end of the first item to ensure the second session is already created, but
      // the first one isn't finished yet.
      TestPlayerRunHelper.playUntilPosition(
          player, /* windowIndex= */ 0, /* positionMs= */ player.getDuration());
      runUntilPendingCommandsAreFullyHandled(player);
      player.release();
      ShadowLooper.idleMainLooper();
  
      ArgumentCaptor<AnalyticsListener.EventTime> eventTimeCaptor =
          ArgumentCaptor.forClass(AnalyticsListener.EventTime.class);
      verify(callback, times(2)).onPlaybackStatsReady(eventTimeCaptor.capture(), any());
      assertThat(
              eventTimeCaptor.getAllValues().stream()
                  .map(eventTime -> eventTime.windowIndex)
                  .collect(Collectors.toList()))
          .containsExactly(0, 1);
    }
  }
  