Episode implements Serializable { public String getAudioUrl() { return getAudio().getUrl(); }  Image getImage(); String getTitle(); Date getPublishedDate(); String getDescription(); String getDuration(); Feed getFeed(); String getAudioFilePath(); String getAudioUrl(); String getAudioLength(); @Override String toString();  }
@Test public void itReturnsEmptyUrlWhenAudioIsNull() { Episode episode = new Episode(); assertThat(episode.getAudioUrl(), is("")); }