spec\Mdb\PayPal\Ipn\ListenerSpec::it_should_attach_a_listener_for_the_message_verification_failure_event PHP Метод

    function it_should_attach_a_listener_for_the_message_verification_failure_event(EventDispatcher $eventDispatcher)
    {
        $eventDispatcher->addListener(Listener::IPN_VERIFICATION_FAILURE_EVENT, Argument::type('callable'))->shouldBeCalled();
        $this->onVerificationFailure(function (MessageVerificationFailureEvent $event) {
        });
    }