@Test public void testFormat() { A10ClientImpl c = Mockito.mock(A10ClientImpl.class); RequestBuilder b = new RequestBuilder(c, "test"); Assertions.assertThat(b.getParams()).doesNotContainKey("format"); assertThat(b.withXmlRequest().getParams()).containsEntry("format", "xml"); assertThat(b.withJsonRequest().getParams()).containsEntry("format", "json"); }