@Test public void addQualification() throws Exception { server.enqueue(new MockResponse().setResponseCode(201).setBody("{\n" + " \"qualifications\": [\n" + " \"API programming champion 2016\",\n" + " \"Linux Daemons\"\n" + " ]\n" + '}')); Response<List<String>, HttpError> response = resource.addQualification("Some desc").execute(); // If no exception was thrown then the spec is build correctly. assertThat(response.body().size()).isEqualTo(2); assertThat(response.body().get(1)).isEqualTo("Linux Daemons"); }