@Test
public void linkRichMenuToUserTest() throws Exception {

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