function assertMatchingNotification($matcher, $subject)
{
// register observer
$observer = $this->getMock("Observer");
NotificationCenter::addObserver($observer, 'update', 'SomeNotification', $matcher);
// expect notication
$observer->expects($this->once())->method('update')->with('SomeNotification', $subject);
// fire!
NotificationCenter::postNotification('SomeNotification', $subject);
// remove observer
NotificationCenter::removeObserver($observer);
}
