@Test
public void getSingleConversationMessage() throws Exception {

    server.enqueue(new MockResponse().setBody(file("messages/conversation_single_message.json")));
    Response<ConversationMessage, HttpError> response = resource.getSingleConversationMessage("123", "123", "123")
          .execute();
    assertThat(response.body().getContent()).isEqualTo("Wait a minute");
}