public function testCheckKeys() {
		$data = array('Multi' => array('dimensonal' => array('array')));
		$this->assertTrue(Set::check($data, 'Multi.dimensonal'));
		$this->assertFalse(Set::check($data, 'Multi.dimensonal.array'));

		$data = array(
			array(
				'Article' => array(
					'id' => '1', 'user_id' => '1', 'title' => 'First Article',
					'body' => 'First Article Body', 'published' => 'Y',
					'created' => '2007-03-18 10:39:23',
					'updated' => '2007-03-18 10:41:31'
				),
				'User' => array(
					'id' => '1', 'user' => 'mariano',
					'password' => '5f4dcc3b5aa765d61d8327deb882cf99',
					'created' => '2007-03-17 01:16:23',
					'updated' => '2007-03-17 01:18:31'
				),
				'Comment' => array(
					array(
						'id' => '1', 'article_id' => '1', 'user_id' => '2',
						'comment' => 'First Comment for First Article',
						'published' => 'Y', 'created' => '2007-03-18 10:45:23',
						'updated' => '2007-03-18 10:47:31'
					),
					array(
						'id' => '2', 'article_id' => '1', 'user_id' => '4',
						'comment' => 'Second Comment for First Article',
						'published' => 'Y', 'created' => '2007-03-18 10:47:23',
						'updated' => '2007-03-18 10:49:31'
					)
				),
				'Tag' => array(
					array(
						'id' => '1', 'tag' => 'tag1', 'created' => '2007-03-18 12:22:23',
						'updated' => '2007-03-18 12:24:31'
					),
					array(
						'id' => '2', 'tag' => 'tag2', 'created' => '2007-03-18 12:24:23',
						'updated' => '2007-03-18 12:26:31'
					)
				)
			),
			array(
				'Article' => array(
					'id' => '3', 'user_id' => '1', 'title' => 'Third Article',
					'body' => 'Third Article Body', 'published' => 'Y',
					'created' => '2007-03-18 10:43:23', 'updated' => '2007-03-18 10:45:31'
				),
				'User' => array(
					'id' => '1', 'user' => 'mariano',
					'password' => '5f4dcc3b5aa765d61d8327deb882cf99',
					'created' => '2007-03-17 01:16:23', 'updated' => '2007-03-17 01:18:31'
				),
				'Comment' => array(),
				'Tag' => array()
			)
		);
		$this->assertTrue(Set::check($data, '0.Article.user_id'));
		$this->assertTrue(Set::check($data, '0.Comment.0.id'));
		$this->assertFalse(Set::check($data, '0.Comment.0.id.0'));
		$this->assertTrue(Set::check($data, '0.Article.user_id'));
		$this->assertFalse(Set::check($data, '0.Article.user_id.a'));
	}