fix: Handled cancelled payment case for iOS

ecommerce/extensions/iap/processors/base_iap.py

@@ -128,6 +128,11 @@ def handle_processor_response(self, response, basket=None):
             if not original_transaction_id:
                 raise PaymentError(response)
 
+            if 'cancellation_reason' in validation_response['receipt']['in_app'][0]:
+                error = 'iOS payment is cancelled for [%s] in basket [%d]'
+                logger.error(error, original_transaction_id, basket.id)
+                raise UserCancelled(response)
+
         # In case of Android transaction_id is required to identify payment
         elif not transaction_id:
             logger.error('Unable to find transaction id for basket [%d]', basket.id)

ecommerce/extensions/iap/tests/processors/test_ios_iap.py

@@ -9,7 +9,7 @@
 import mock
 from django.test import RequestFactory
 from django.urls import reverse
-from oscar.apps.payment.exceptions import GatewayError, PaymentError
+from oscar.apps.payment.exceptions import GatewayError, PaymentError, UserCancelled
 from oscar.core.loading import get_model
 from testfixtures import LogCapture
 
@@ -185,6 +185,19 @@ def test_handle_processor_response_payment_error(self, mock_ios_validator):
 
             self.processor.handle_processor_response(modified_return_data, basket=self.basket)
 
+    @mock.patch.object(IOSValidator, 'validate')
+    def test_handle_cancelled_payment_error(self, mock_ios_validator):
+        """
+        Verify that User cancelled exception is raised in presence of cancellation_reason parameter.
+        """
+        modified_validation_response = self.mock_validation_response
+        modified_validation_response['receipt']['in_app'][2]['cancellation_reason'] = 0
+        mock_ios_validator.return_value = modified_validation_response
+        with self.assertRaises(UserCancelled):
+            modified_return_data = self.RETURN_DATA
+
+            self.processor.handle_processor_response(modified_return_data, basket=self.basket)
+
     @mock.patch.object(IOSIAP, 'is_payment_redundant')
     @mock.patch.object(IOSValidator, 'validate')
     def test_handle_processor_response_redundant_error(self, mock_ios_validator, mock_payment_redundant):