address.setStreet( null );
address.setZipCode( null );
String townInNorthWales = "Llanfairpwllgwyngyllgogerychwyrndrobwyll-llantysiliogogogoch";
address.setCity( townInNorthWales );
Set<ConstraintViolation<Address>> constraintViolations = validator.validateProperty( address, "city" );
assertCorrectNumberOfViolations( constraintViolations, 1 );
assertCorrectConstraintTypes( constraintViolations, Size.class );
ConstraintViolation<Address> violation = constraintViolations.iterator().next();
assertConstraintViolation( violation, Address.class, townInNorthWales, "city" );
assertCorrectConstraintViolationMessages(