public function testAddRemoveListener() { $dispatcher = new EventDispatcher(); $tdispatcher = new TraceableEventDispatcher($dispatcher, new Stopwatch()); $tdispatcher->addListener('foo', $listener = function () { }); $listeners = $dispatcher->getListeners('foo'); $this->assertCount(1, $listeners); $this->assertSame($listener, $listeners[0]); $tdispatcher->removeListener('foo', $listener); $this->assertCount(0, $dispatcher->getListeners('foo')); }