@Test
public void unlinkRichMenuIdFromUsers() throws Exception {

    whenCall(retrofitMock.unlinkRichMenuIdFromUsers(any()),
             null);
    // Do
    final BotApiResponse botApiResponse = target.unlinkRichMenuIdFromUsers(singletonList("ID"))
                                                .join();
    // Verify
    verify(retrofitMock, only()).unlinkRichMenuIdFromUsers(
            RichMenuBulkUnlinkRequest.builder().userId("ID").build());
    assertThat(botApiResponse).isEqualTo(BOT_API_SUCCESS_RESPONSE);
}