tester.setupRequestAndResponse();
WebRequestCycle cycle = tester.createRequestCycle();
ResourceReference rr = new ResourceReference(Application.class, "test.css", true, true);
Session.get().setLocale(Locale.GERMANY);
CharSequence url = cycle.urlFor(rr);
assertEquals("resources/org.apache.wicket.Application/test_de_DE.css", url.toString());
Session.get().setStyle("foo");
url = cycle.urlFor(rr);
assertEquals("resources/org.apache.wicket.Application/test_foo_de_DE.css", url.toString());