dispatcher.getRegistry().addPerRequestResource(CollectionResource.class);
{
MockHttpRequest request = MockHttpRequest.get("/collection/annotation_free_subresource");
MockHttpResponse response = new MockHttpResponse();
dispatcher.invoke(request, response);
Assert.assertEquals(HttpServletResponse.SC_OK, response.getStatus());
Assert.assertEquals("got", response.getContentAsString());
Assert.assertNotNull(response.getOutputHeaders().get("Content-Type"));
Assert.assertTrue(response.getOutputHeaders().get("Content-Type").size() > 0);