React\Promise\PromiseTest\CancelTestTrait::cancelShouldTriggerCancellerWhenAllChildrenCancel PHP Метод

    public function cancelShouldTriggerCancellerWhenAllChildrenCancel()
    {
        $adapter = $this->getPromiseTestAdapter($this->expectCallableOnce());
        $child1 = $adapter->promise()->then()->then();
        $child2 = $adapter->promise()->then();
        $child1->cancel();
        $child2->cancel();
    }