@Test
public void unlinkRichMenuIdFromUser() throws Exception {

    whenCall(retrofitMock.unlinkRichMenuIdFromUser(any()),
             null);
    // Do
    final BotApiResponse botApiResponse = target.unlinkRichMenuIdFromUser("ID").get();
    // Verify
    verify(retrofitMock, only()).unlinkRichMenuIdFromUser("ID");
    assertThat(botApiResponse).isEqualTo(BOT_API_SUCCESS_RESPONSE);
}