Rx\Functional\Operator\DelayTest::delay_empty PHP Method

    public function delay_empty()
    {
        $xs = $this->createHotObservable([onNext(150, 1), onCompleted(550)]);
        $results = $this->scheduler->startWithCreate(function () use($xs) {
            return $xs->delay(10, $this->scheduler);
        });
        $this->assertMessages([onCompleted(560)], $results->getMessages());
        $this->assertSubscriptions([subscribe(200, 550)], $xs->getSubscriptions());
    }