Kraken\_Unit\Promise\PromiseRejectedTest::createDeferred PHP Метод

    public function createDeferred()
    {
        $promise = null;
        return new DeferredBridge(['getPromise' => function () use(&$promise) {
            if (!$promise) {
                throw new Exception(sprintf("[%s] must be rejected before obtaining the promise.", PromiseRejected::class));
            }
            return $promise;
        }, 'resolve' => function () {
            throw new Exception(sprintf("You cannot call resolve() for [%s].", PromiseRejected::class));
        }, 'reject' => function ($reason = null) use(&$promise) {
            if (!$promise) {
                $promise = new PromiseRejected($reason);
            }
        }, 'cancel' => function () {
            throw new Exception(sprintf("You cannot call cancel() for [%s].", PromiseRejected::class));
        }]);
    }