@Test
public void getMessageQuotaConsumption() {

    whenCall(retrofitMock.getMessageQuotaConsumption(),
             new QuotaConsumptionResponse(1024));
    QuotaConsumptionResponse response = target.getMessageQuotaConsumption().join();
    verify(retrofitMock, only()).getMessageQuotaConsumption();
    assertThat(response.getTotalUsage()).isEqualTo(1024);
}