public function testDefaultClasses()
{
Form::config()->update('default_classes', array('class1'));
$form = $this->getStubForm();
$this->assertContains('class1', $form->extraClass(), 'Class list does not contain expected class');
Form::config()->update('default_classes', array('class1', 'class2'));
$form = $this->getStubForm();
$this->assertContains('class1 class2', $form->extraClass(), 'Class list does not contain expected class');
Form::config()->update('default_classes', array('class3'));
$form = $this->getStubForm();
$this->assertContains('class3', $form->extraClass(), 'Class list does not contain expected class');
$form->removeExtraClass('class3');
$this->assertNotContains('class3', $form->extraClass(), 'Class list contains unexpected class');
}