/**
* test class
*/
public function testClass()
{
$input = new TextInput('test');
$input->setClass('class');
$this->assertEquals(' class="class"', $input->renderClass());
$input->addClass('secondClass');
$this->assertEquals(' class="class secondClass"', $input->renderClass());
$this->assertEquals(array('class', 'secondClass'), $input->getClasses());
$input->removeClass('class');
$this->assertEquals(' class="secondClass"', $input->renderClass());
}