@Test
public void sendContactRequest() throws Exception {

    server.enqueue(new MockResponse().setResponseCode(201));
    Response<Void, HttpError> response = resource.sendContactRequest("11187562").execute();
    // If no exception was thrown then the spec is build correctly.
    assertThat(response.isSuccessful()).isTrue();
    assertThat(response.body()).isNull();
}