@Test
public void updateComment() throws Exception {

    String postId = "postId";
    String commentId = "commentId";
    Comment comment = mock(Comment.class);
    when(rxTapglue.updateComment(postId, commentId, comment)).thenReturn(Observable.just(comment));
    assertThat(tapglue.updateComment(postId, commentId, comment), equalTo(comment));
}