Simplifying Route testing

For AEROGEAR-778 we have been looking into making it easier to test routes. We have been using Mockito which works nicely, but there was a bit of duplicated code spread across different tests and also the test were not that easy to read.
Below are examples of one of the tests before and after, hopefully the after will be easier to read.

Before

@Test
    public void testRestRouteWithPathParam() throws Exception {
        final RoutingModule routingModule = new AbstractRoutingModule() {
            @Override
            public void configuration() {
                route()
                        .from("/car/{id}").roles("admin")
                        .on(GET)
                        .produces(mockJsp(), mockJson())
                        .to(SampleController.class).find(param("id"));
            }
        };
        final Routes routes = routingModule.build();
        when(request.getMethod()).thenReturn(RequestMethod.GET.toString());
        when(request.getServletContext()).thenReturn(servletContext);
        when(servletContext.getContextPath()).thenReturn("/abc");
        when(request.getRequestURI()).thenReturn("/abc/car/3");
        when(request.getHeader("Accept")).thenReturn("application/json");
        when(jsonResponder.accepts("application/json")).thenReturn(true);
        when(jsonResponder.mediaType()).thenReturn(mockJson());
        final Route route = routes.routeFor(GET, "/car/{id}", acceptHeaders(JSON.getMediaType()));
        router.process(new RouteContext(route, request, response, routes));
        verify(jsonResponder).respond(anyObject(), any(RouteContext.class));
    }

After

@Test
    public void testRestRouteWithPathParam() throws Exception {
        final RouteTester routeTester = RouteTester.from(new AbstractRoutingModule() {
            @Override
            public void configuration() {
                route()
                        .from("/car/{id}").roles("admin")
                        .on(GET)
                        .produces(JSP, JSON)
                        .to(SampleController.class).find(param("id"));
            }
        });
        routeTester.acceptHeader(JSON).processGetRequest("/car/3");
        verify(routeTester.<SampleController>getController()).find("3");
        verify(routeTester.jsonResponder()).respond(any(), any(RouteContext.class));
    }