* @return a {@link FormTester} instance
*/
private FormTester causeValidationErrorAndSubmit(String formToBeSubmitted,
String componentToGetError)
{
FormTester formTester;
formTester = tester.newFormTester(formToBeSubmitted);
formTester.setValue(componentToGetError, "");
formTester.submit("submit");
return formTester;
}