public function testDepthFourLevelsWithAll() {
		$data = array(
			'1' => array('1.1' => '1.1.1'), array(
			'2' => array('2.1' => array('2.1.1' => '2.1.1.1'))),
			'3' => array('3.1' => array('3.1.1' => '3.1.1.1'))
		);
		$result = Set::depth($data, array('all' => true));
		$this->assertEqual(4, $result);
	}