public function testDispatch() { $eventMock = $this->getMock('Magento\\Framework\\Event', [], [], '', false); $observer1 = $this->getObserverMock('test_observer1', $eventMock); $observer2 = $this->getObserverMock('test_observer2', $eventMock); $this->observerCollection->addObserver($observer1); $this->observerCollection->addObserver($observer2); $this->observerCollection->dispatch($eventMock); }