tester.startPage(EdbClient.class);
FormTester formTester = tester.newFormTester("form");
DropDownChoice<Class<? extends OpenEngSBModel>> modeldropdown =
(DropDownChoice<Class<? extends OpenEngSBModel>>) tester
.getComponentFromLastRenderedPage("form:modelSelector");
formTester.select("modelSelector", getIndexForValue(modeldropdown, "DummyModel"));
tester.executeAjaxEvent(modeldropdown, "onchange");
formTester.setValue("query", "crap");
tester.executeAjaxEvent("form:submit", "onclick");
tester.assertFeedback("form:feedback", String.format("Error when querying for models %s (%s)",
"illegal query", IllegalArgumentException.class.getName()));