public function testMatchesMultipleLevels() {
		$result = array(
			'Attachment' => array(
				'keep' => array()
			),
			'Comment' => array(
				'keep' => array('Attachment' =>  array('fields' => array('attachment')))
			),
			'User' => array('keep' => array()),
			'Article' => array(
				'keep' => array(
					'Comment' =>  array('fields' => array('comment', 'published')),
					'User' => array('fields' => array('user'))
				)
			)
		);
		$this->assertTrue(Set::matches($result, '/Article/keep/Comment'));

		$result = Set::matches($result, '/Article/keep/Comment/fields/user');
		$this->assertFalse($result);
	}