public function testValidationFalseBadValues()
 {
     $form = new Admin_Form_PersonLink();
     $post = array('PersonId' => 'tom', 'Role' => 'unknown');
     $this->assertFalse($form->isValid($post));
     $this->assertContains('notInt', $form->getErrors('PersonId'));
     $this->assertContains('notInArray', $form->getErrors('Role'));
 }