ContainerInteropDoctrineTest\EventManagerFactoryTest::testClassNameSubscriber PHP Method

    public function testClassNameSubscriber()
    {
        $container = $this->buildContainer(StubEventSubscriber::class);
        $container->has(StubEventSubscriber::class)->willReturn(false);
        $factory = new EventManagerFactory();
        $eventManager = $factory($container->reveal());
        $this->assertSame(1, count($eventManager->getListeners('foo')));
    }