### Question:
DefaultMediaClock implements MediaClock { public void stop() { standaloneClockIsStarted = false; standaloneClock.stop(); } DefaultMediaClock(PlaybackParameterListener listener, Clock clock); void start(); void stop(); void resetPosition(long positionUs); void onRendererEnabled(Renderer renderer); void onRendererDisabled(Renderer renderer); long syncAndGetPositionUs(boolean isReadingAhead); @Override long getPositionUs(); @Override void setPlaybackParameters(PlaybackParameters playbackParameters); @Override PlaybackParameters getPlaybackParameters();  }### Answer:
@Test public void standaloneStop_shouldKeepClockStopped() throws Exception { mediaClock.stop(); assertClockIsStopped(); }