public function testRemoveAllListenersNoArg()
{
$result = false;
$callback = function () use(&$result) {
$result = true;
};
$eManager = new EventManager();
$eManager->on('foo', $callback);
is(1, $eManager->trigger('foo'));
isTrue($result);
$result = false;
$eManager->removeListeners();
is(0, $eManager->trigger('foo'));
isFalse($result);
}
