@Test
public void testOnFetchingAudioEvent_Refreshing() {

    FetchingAudioEvent event = new FetchingAudioEvent(true, FetchingEvent.RESULT.REFRESHING, "audio1", System.currentTimeMillis());
    mSentenceDetailPresenter.onFetchingAudioEvent(event);
    // show loading result
    verify(mView).showFetchingResult(R.string.loading);
}