Rx\Observable\GroupedObservableTest::it_exposes_its_key PHP Method

    public function it_exposes_its_key()
    {
        $observable = new AnonymousObservable(function () {
        });
        $groupedObservable = new GroupedObservable('key', $observable);
        $this->assertEquals('key', $groupedObservable->getKey());
    }