public function addEventHandler($name, $handler)
 {
     $this->events->addListener($name, $handler);
     return $this;
 }
 public function testExceptionOnHandlerForUnknownEvent()
 {
     $events = new EventContainer();
     $this->setExpectedException('InvalidArgumentException');
     $events->addListener('invalid', function () {
     });
 }