@Test
  public void applicationJson_invalid() throws Exception {

    final String href = givenLinkToService();

    final RestfulRequest request =
        client
            .createRequest(HttpMethod.GET, href)
            .withHeader(RestfulRequest.Header.ACCEPT, RepresentationType.USER.getMediaType());
    final RestfulResponse<DomainObjectRepresentation> restfulResponse = request.executeT();

    assertThat(restfulResponse.getStatus(), is(HttpStatusCode.NOT_ACCEPTABLE));
  }
  @Test
  public void ok() throws Exception {

    // given
    final Response resp = resource.user();

    // when
    final RestfulResponse<UserRepresentation> restfulResponse = RestfulResponse.ofT(resp);

    // then
    final MediaType contentType = restfulResponse.getHeader(Header.CONTENT_TYPE);
    assertThat(contentType, hasMediaType("application"));
    assertThat(contentType, hasSubType("json"));
    assertThat(contentType, hasParameter("profile", "urn:org.restfulobjects:repr-types/user"));
    assertThat(contentType, is(RepresentationType.USER.getMediaType()));
  }