public function testCacheReadThroughWrite() {
		$config = array('default' => array(
			'adapter' => 'Memory', 'filters' => array()
		));
		Cache::config($config);
		$result = Cache::config();
		$expected = $config;
		$this->assertEqual($expected, $result);

		$write = function() {
			return array('+1 minute' => 'read-through write');
		};
		$result = Cache::read('default', 'read_through');
		$this->assertNull($result);

		$result = Cache::read('default', 'read_through', compact('write'));
		$this->assertEqual('read-through write', $result);

		$result = Cache::read('default', 'read_through');
		$this->assertEqual('read-through write', $result);

		$write = array('+1 minute' => 'string read-through write');
		$result = Cache::read('default', 'string_read_through', compact('write'));
		$this->assertEqual('string read-through write', $result);

		$result = Cache::read('default', 'string_read_through');
		$this->assertEqual('string read-through write', $result);
	}