Self-service refund form (#1135)

* Auto-refund

* Add missing template

* Notification for requested refund

* Model-level tests

* Add front-end tests

* Default to notify

src/tests/testdummy/payment.py

@@ -2,6 +2,7 @@ import logging
 
 from django.http import HttpRequest
 
+from pretix.base.models import OrderPayment, OrderRefund
 from pretix.base.payment import BasePaymentProvider
 
 logger = logging.getLogger('tests.testdummy.ticketoutput')
@@ -17,3 +18,42 @@ class DummyPaymentProvider(BasePaymentProvider):
 
     def checkout_confirm_render(self, request) -> str:
         pass
+
+
+class DummyFullRefundablePaymentProvider(BasePaymentProvider):
+    identifier = 'testdummy_fullrefund'
+    verbose_name = 'Test dummy'
+    abort_pending_allowed = False
+
+    def execute_refund(self, refund: OrderRefund):
+        refund.done()
+
+    def payment_is_valid_session(self, request: HttpRequest) -> bool:
+        pass
+
+    def checkout_confirm_render(self, request) -> str:
+        pass
+
+    def payment_refund_supported(self, payment: OrderPayment) -> bool:
+        return True
+
+
+class DummyPartialRefundablePaymentProvider(BasePaymentProvider):
+    identifier = 'testdummy_partialrefund'
+    verbose_name = 'Test dummy'
+    abort_pending_allowed = False
+
+    def execute_refund(self, refund: OrderRefund):
+        refund.done()
+
+    def payment_is_valid_session(self, request: HttpRequest) -> bool:
+        pass
+
+    def checkout_confirm_render(self, request) -> str:
+        pass
+
+    def payment_refund_supported(self, payment: OrderPayment) -> bool:
+        return True
+
+    def payment_partial_refund_supported(self, payment: OrderPayment) -> bool:
+        return True

src/tests/testdummy/signals.py

@@ -13,5 +13,5 @@ def register_ticket_outputs(sender, **kwargs):
 
 @receiver(register_payment_providers, dispatch_uid="payment_dummy")
 def register_payment_provider(sender, **kwargs):
-    from .payment import DummyPaymentProvider
-    return DummyPaymentProvider
+    from .payment import DummyPaymentProvider, DummyFullRefundablePaymentProvider, DummyPartialRefundablePaymentProvider
+    return [DummyPaymentProvider, DummyFullRefundablePaymentProvider, DummyPartialRefundablePaymentProvider]