/**
* Ensures that addExtension() returns expected value
*
* @return void
*/
public function testAddExtension()
{
$validator = new File\ExcludeExtension('mo');
$validator->addExtension('gif');
$this->assertEquals(array('mo', 'gif'), $validator->getExtension());
$validator->addExtension('jpg, to');
$this->assertEquals(array('mo', 'gif', 'jpg', 'to'), $validator->getExtension());
$validator->addExtension(array('zip', 'ti'));
$this->assertEquals(array('mo', 'gif', 'jpg', 'to', 'zip', 'ti'), $validator->getExtension());
$validator->addExtension('');
$this->assertEquals(array('mo', 'gif', 'jpg', 'to', 'zip', 'ti'), $validator->getExtension());
}
