public function testHasListeners()
{
$dispatcher = new EventDispatcher();
$tdispatcher = new TraceableEventDispatcher($dispatcher, new Stopwatch());
$this->assertFalse($dispatcher->hasListeners('foo'));
$this->assertFalse($tdispatcher->hasListeners('foo'));
$tdispatcher->addListener('foo', $listener = function () {
});
$this->assertTrue($dispatcher->hasListeners('foo'));
$this->assertTrue($tdispatcher->hasListeners('foo'));
}
