Rx\Observable\AnonymousObservableTest::it_calls_the_subscribe_action_on_subscribe PHP Method

    public function it_calls_the_subscribe_action_on_subscribe()
    {
        $called = 0;
        $observable = new AnonymousObservable(function () use(&$called) {
            $called++;
            return new EmptyDisposable();
        });
        $observerMock = $this->createMock('Rx\\ObserverInterface');
        $observable->subscribe($observerMock);
        $this->assertEquals(1, $called);
    }