@Test
public void multicastTest() throws Exception {

    whenCall(retrofitMock.multicast(isNull(), any(Multicast.class)),
             BOT_API_SUCCESS_RESPONSE_BODY);
    final Multicast multicast = new Multicast(singleton("TO"), new TextMessage("text"));
    // Do
    final BotApiResponse botApiResponse =
            target.multicast(multicast).get();
    // Verify
    verify(retrofitMock, only()).multicast(null, multicast);
    assertThat(botApiResponse).isEqualTo(BOT_API_SUCCESS_RESPONSE);
}