React\Promise\CancellationQueueTest::callsCancelOnPromisesEnqueuedAfterStart PHP Method

    public function callsCancelOnPromisesEnqueuedAfterStart()
    {
        $d1 = $this->getCancellableDeferred();
        $d2 = $this->getCancellableDeferred();
        $cancellationQueue = new CancellationQueue();
        $cancellationQueue();
        $cancellationQueue->enqueue($d2->promise());
        $cancellationQueue->enqueue($d1->promise());
    }