@Test
 public void testPreconditionsNoneMatch() {
   MutableRequest mr = new MutableRequest("", "http://example.org/app/resource", "GET");
   mr.header(HttpHeaders.IF_NONE_MATCH, "\"686897696a7c876b7e\"");
   Request r = mr.toJaxrsRequest();
   assertEquals(
       r.evaluatePreconditions(new EntityTag("686897696a7c876b7e")).build().getStatus(),
       Status.NOT_MODIFIED.getStatusCode());
   assertNull(r.evaluatePreconditions(new EntityTag("000000000000000000")));
 }
 @Test
 public void testPreconditionsModified() throws ParseException {
   MutableRequest mr = new MutableRequest("", "http://example.org/app/resource", "GET");
   mr.header(HttpHeaders.IF_MODIFIED_SINCE, "Sat, 29 Oct 2011 19:43:31 GMT");
   Request r = mr.toJaxrsRequest();
   SimpleDateFormat f = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss Z", Locale.ENGLISH);
   Date date = f.parse("Sat, 29 Oct 2011 19:43:31 GMT");
   assertEquals(
       r.evaluatePreconditions(date).build().getStatus(), Status.NOT_MODIFIED.getStatusCode());
   date = f.parse("Sat, 30 Oct 2011 19:43:31 GMT");
   assertNull(r.evaluatePreconditions(date));
 }
 @Test
 public void testSelectVariant() {
   MutableRequest mr = new MutableRequest("", "http://example.org/app/resource", "GET");
   mr.header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON);
   mr.header(HttpHeaders.ACCEPT_LANGUAGE, "en");
   Request r = mr.toJaxrsRequest();
   List<Variant> lv =
       Variant.mediaTypes(MediaType.APPLICATION_XML_TYPE, MediaType.APPLICATION_JSON_TYPE)
           .languages(Locale.ENGLISH, Locale.FRENCH)
           .add()
           .build();
   assertEquals(r.selectVariant(lv).getMediaType(), MediaType.APPLICATION_JSON_TYPE);
   assertEquals(r.selectVariant(lv).getLanguage(), Locale.ENGLISH);
 }
 @Test
 public void testUri() throws URISyntaxException {
   MutableRequest r = new MutableRequest("", "http://example.org/app/resource", "GET");
   Request v = r.toJaxrsRequest();
   assertEquals(v.getUri(), URI.create("http://example.org/app/resource"));
 }
 @Test
 public void testMethod() {
   MutableRequest r = new MutableRequest("", "http://example.org/app/resource", "GET");
   Request v = r.toJaxrsRequest();
   assertEquals(v.getMethod(), "GET");
 }