Test Paypal

    def test_paypal_callback(self):
        response = self.client.login(username=self.user.email, password='foz')
        self.assertTrue(response)

        # create post params simulation from paypal
        order = OrderFactory(event=self.event, cart=self.cart,
                payment_method=self.payment_method)
        total = '%.2f' % self.total

        post_param = {
            'protection_eligibility': 'Ineligible',
            'last_name': 'User',
            'txn_id': '5CX1007279882822D',
            'receiver_email': settings.PAYPAL_RECEIVER_EMAIL,
            'payment_status': 'Completed',
            'payment_gross': total,
            'tax': '0.00',
            'residence_country': 'US',
            'invoice': str(order.invoice),
            'payer_status': 'verified',
            'txn_type': 'web_accept',
            'handling_amount': '0.00',
            'payment_date': '20:14:30 Oct 26, 2011 PDT',
            'first_name': 'Test',
            'item_name': 'Tickets purchase for "%s" event' % self.event.name,
            'charset': 'windows-1252',
            'custom': str(self.cart.id),
            'notify_version': '3.4',
            'transaction_subject': '56',
            'test_ipn': '1',
            'item_number': '',
            'receiver_id': '2WGLZMQJ2Q55S',
            'business': 'nychng_1318992102_biz@yahoo.com',
            'payer_id': 'H9EKJD2UM57NS',
            'verify_sign': 'An5ns1Kso7MWUdW4ErQKJJJ4qi4-Akjuvg1YuENslOPf8ZbzcTsrCw0I',
            'payment_fee': '0.62',
            'mc_fee': '0.62',
            'currency': 'USD',
            'mc_currency': 'USD',
            'shipping': '0.00',
            'payer_email': 'nychng_1319511621_per@yahoo.com',
            'payment_type': 'instant',
            'mc_gross': total,
            'ipn_track_id': 'cauOC6SwncFkBL9PDclc-Q',
            'quantity': '1'
            }

        # Monkey patch over PayPalIPN to make it get a VERFIED response.
        self.old_postback = PayPalIPN._postback
        PayPalIPN._postback = lambda self: "VERIFIED"

        # call paypal ipn with post params
        notify_url = reverse('paypal-ipn')
        response = self.client.post(notify_url, post_param, follow=True)
        self.assertEqual(response.status_code, 200)

        # check ipn object exists
        self.assertEqual(PayPalIPN.objects.all().count(), 1)
        ipn_obj = PayPalIPN.objects.all()[0]
        self.assertEqual(ipn_obj.payer_email, post_param['payer_email'])
        self.assertEqual(ipn_obj.custom, str(post_param['custom']))
        self.assertEqual(ipn_obj.txn_id, post_param['txn_id'])
        self.assertEqual(ipn_obj.payment_gross,
                Decimal(post_param['payment_gross']))
        self.assertEqual(ipn_obj.mc_gross, Decimal(post_param['mc_gross']))

        # check updates for the cart and orders models
        order = Order.objects.all()[0]
        self.cart = Cart.objects.all()[0]
        self.assertTrue(self.cart.paid)
        self.assertEqual(self.cart.status, 'finished')

        order = Order.objects.all()[0]
        self.assertEqual(order.order_status, 2)

        # ticket holding
        self.assertEqual(TicketHolding.objects.all().count(), 1)
        tix = TicketHolding.objects.all()[0]
        self.assertEqual(tix.confirmed, 1)

        # check pdf generated
        order = Order.objects.all()[0]
        path = '{0}{1}{2}{3}'.format(settings.MEDIA_ROOT,
                'files/registration/', order.receipt, '.pdf')
        self.assertTrue(os.path.exists(path))

        # destroy pdf
        os.remove(path)
        self.assertFalse(os.path.exists(path))

        # check email sent
        #self.assertEqual(Notification.objects.all().count(), 1)
        #item = Item.objects.all()[0]
        #self.assertEqual(item.quantity_left, 9)