public function testContains() {
		$a = array(
			0 => array('name' => 'main'),
			1 => array('name' => 'about')
		);
		$b = array(
			0 => array('name' => 'main'),
			1 => array('name' => 'about'),
			2 => array('name' => 'contact'),
			'a' => 'b'
		);

		$this->assertTrue(Set::contains($a, $a));
		$this->assertFalse(Set::contains($a, $b));
		$this->assertTrue(Set::contains($b, $a));
	}