public function testIsRegistered()
{
$handler = new ShutdownHandler(array(get_class($this), 'shutdown'), array());
$this->assertSame(true, $handler->isRegistered());
$handler = new ShutdownHandler(array(get_class($this), 'shutdown'), array());
$handler->unRegister();
$this->assertSame(false, $handler->isRegistered());
self::$testVariable = 0;
ShutdownHandler::shutdown();
$this->assertSame(1, self::$testVariable);
}
