Rx\Observable\ObservableTest::it_returns_false_on_trying_to_remove_a_non_subscribed_observer PHP Method

    public function it_returns_false_on_trying_to_remove_a_non_subscribed_observer()
    {
        $observable = new ConcreteObservable();
        $observer = $this->createMock('Rx\\ObserverInterface');
        $this->assertFalse($observable->removeObserver($observer));
    }