@Test
  public void resolveViewNameWithRequestParameter() throws Exception {
    request.addParameter("format", "xls");

    viewResolver.setFavorParameter(true);
    viewResolver.setMediaTypes(Collections.singletonMap("xls", "application/vnd.ms-excel"));

    ViewResolver viewResolverMock = createMock(ViewResolver.class);
    viewResolver.setViewResolvers(Collections.singletonList(viewResolverMock));

    View viewMock = createMock("application_xls", View.class);

    String viewName = "view";
    Locale locale = Locale.ENGLISH;

    expect(viewResolverMock.resolveViewName(viewName, locale)).andReturn(null);
    expect(viewResolverMock.resolveViewName(viewName + ".xls", locale)).andReturn(viewMock);
    expect(viewMock.getContentType()).andReturn("application/vnd.ms-excel").anyTimes();

    replay(viewResolverMock, viewMock);

    View result = viewResolver.resolveViewName(viewName, locale);
    assertSame("Invalid view", viewMock, result);

    verify(viewResolverMock, viewMock);
  }
 @Test
 public void getMediaTypeParameter() {
   viewResolver.setFavorParameter(true);
   viewResolver.setMediaTypes(Collections.singletonMap("html", "application/xhtml+xml"));
   request.addParameter("format", "html");
   List<MediaType> result = viewResolver.getMediaTypes(request);
   assertEquals(
       "Invalid content type",
       Collections.singletonList(new MediaType("application", "xhtml+xml")),
       result);
 }