### Question:
MediaSession2 extends MediaInterface2.SessionPlayer implements AutoCloseable { @Override public void pause() { mImpl.pause(); } MediaSession2(SupportLibraryImpl impl); void updatePlayer(@NonNull MediaPlayerInterface player,
            @Nullable MediaPlaylistAgent playlistAgent,
            @Nullable VolumeProviderCompat volumeProvider); @Override void close(); @NonNull MediaPlayerInterface getPlayer(); @NonNull MediaPlaylistAgent getPlaylistAgent(); @Nullable VolumeProviderCompat getVolumeProvider(); @NonNull SessionToken2 getToken(); @NonNull List<ControllerInfo> getConnectedControllers(); void setAudioFocusRequest(@Nullable AudioFocusRequest afr); void setCustomLayout(@NonNull ControllerInfo controller,
            @NonNull List<CommandButton> layout); void setAllowedCommands(@NonNull ControllerInfo controller,
            @NonNull SessionCommandGroup2 commands); void sendCustomCommand(@NonNull SessionCommand2 command, @Nullable Bundle args); void sendCustomCommand(@NonNull ControllerInfo controller,
            @NonNull SessionCommand2 command, @Nullable Bundle args,
            @Nullable ResultReceiver receiver); @Override void play(); @Override void pause(); @Override void reset(); @Override void prepare(); @Override void seekTo(long pos); @RestrictTo(LIBRARY_GROUP) @Override void skipForward(); @RestrictTo(LIBRARY_GROUP) @Override void skipBackward(); @Override void notifyError(@ErrorCode int errorCode, @Nullable Bundle extras); void notifyRoutesInfoChanged(@NonNull ControllerInfo controller,
            @Nullable List<Bundle> routes); @Override @PlayerState int getPlayerState(); @Override long getCurrentPosition(); @Override long getDuration(); @Override long getBufferedPosition(); @Override @BuffState int getBufferingState(); @Override float getPlaybackSpeed(); @Override void setPlaybackSpeed(float speed); @Override void setOnDataSourceMissingHelper(@NonNull OnDataSourceMissingHelper helper); @Override void clearOnDataSourceMissingHelper(); @Override List<MediaItem2> getPlaylist(); @Override void setPlaylist(@NonNull List<MediaItem2> list, @Nullable MediaMetadata2 metadata); @Override void skipToPlaylistItem(@NonNull MediaItem2 item); @Override void skipToPreviousItem(); @Override void skipToNextItem(); @Override MediaMetadata2 getPlaylistMetadata(); @Override void addPlaylistItem(int index, @NonNull MediaItem2 item); @Override void removePlaylistItem(@NonNull MediaItem2 item); @Override void replacePlaylistItem(int index, @NonNull MediaItem2 item); @Override MediaItem2 getCurrentMediaItem(); @Override void updatePlaylistMetadata(@Nullable MediaMetadata2 metadata); @Override @RepeatMode int getRepeatMode(); @Override void setRepeatMode(@RepeatMode int repeatMode); @Override @ShuffleMode int getShuffleMode(); @Override void setShuffleMode(@ShuffleMode int shuffleMode); static final int ERROR_CODE_UNKNOWN_ERROR; static final int ERROR_CODE_APP_ERROR; static final int ERROR_CODE_NOT_SUPPORTED; static final int ERROR_CODE_AUTHENTICATION_EXPIRED; static final int ERROR_CODE_PREMIUM_ACCOUNT_REQUIRED; static final int ERROR_CODE_CONCURRENT_STREAM_LIMIT; static final int ERROR_CODE_PARENTAL_CONTROL_RESTRICTED; static final int ERROR_CODE_NOT_AVAILABLE_IN_REGION; static final int ERROR_CODE_CONTENT_ALREADY_PLAYING; static final int ERROR_CODE_SKIP_LIMIT_REACHED; static final int ERROR_CODE_ACTION_ABORTED; static final int ERROR_CODE_END_OF_QUEUE; static final int ERROR_CODE_SETUP_REQUIRED; }### Answer:
@Test public void testPause() throws Exception { prepareLooper(); mSession.pause(); assertTrue(mPlayer.mPauseCalled); }