@Test
public void getRichMenuListTest() throws Exception {

    whenCall(retrofitMock.getRichMenuList(),
             new RichMenuListResponse(emptyList()));
    // Do
    final RichMenuListResponse richMenuListResponse = target.getRichMenuList().get();
    // Verify
    verify(retrofitMock, only()).getRichMenuList();
    assertThat(richMenuListResponse.getRichMenus()).isEmpty();
}