/** Test creation with regular expression. */
@Test
public void testCreation_withExpression() {
String expression = "[^b]at"; // $NON-NLS-1$
descriptor.setExpression(expression);
tester.startPage(getTestPage());
@SuppressWarnings("unchecked")
TextArea<String> tf = (TextArea<String>) getTestSubject();
tf.setDefaultModelObject("bat"); // $NON-NLS-1$
FormTester ft = tester.newFormTester(TestPage.FORM_ID);
ft.submit();
Assert.assertTrue(getFeedbackPanel().anyErrorMessage());
List<FeedbackMessage> messages = getFeedbackPanel().getFeedbackMessagesModel().getObject();
Assert.assertEquals(1, messages.size());
String msg = messages.get(0).toString();
Assert.assertTrue(msg.contains(expression));
Assert.assertFalse(tester.getLastResponse().getDocument().contains(MarkupConstants.READONLY));
}
