Add tests and remove redundant checks

src/pretix/base/models/orders.py

@@ -282,11 +282,11 @@ class Order(LoggedModel):
         if self.event.settings.get('payment_term_last'):
             if now() > self.event.payment_term_last:
                 return error_messages['late_lastdate']
-        if self.status == self.STATUS_PENDING:
-            return True
         if not self.event.settings.get('payment_term_accept_late'):
             return error_messages['late']
 
+        if self.status == self.STATUS_PENDING:
+            return True
         return self._is_still_available()
 
     def _is_still_available(self, now_dt: datetime=None) -> Union[bool, str]:

src/pretix/base/services/cart.py

@@ -115,8 +115,9 @@ def _add_new_items(event: Event, items: List[dict],
         if i.get('voucher'):
             try:
                 voucher = Voucher.objects.get(code=i.get('voucher').strip(), event=event)
-                if voucher.redeemed >= voucher.max_usages:
-                    return error_messages['voucher_redeemed']
+            except Voucher.DoesNotExist:
+                return error_messages['voucher_invalid']
+            else:
                 if voucher.valid_until is not None and voucher.valid_until < now_dt:
                     return error_messages['voucher_expired']
                 if not voucher.applies_to(item, variation):
@@ -135,15 +136,9 @@ def _add_new_items(event: Event, items: List[dict],
                 if i['count'] > v_avail:
                     return error_messages['voucher_redeemed_partial'] % v_avail
 
-            except Voucher.DoesNotExist:
-                return error_messages['voucher_invalid']
-
         # Fetch all quotas. If there are no quotas, this item is not allowed to be sold.
         quotas = list(item.quotas.all()) if variation is None else list(variation.quotas.all())
 
-        if voucher and voucher.quota and voucher.quota.pk not in [q.pk for q in quotas]:
-            return error_messages['voucher_invalid_item']
-
         if item.require_voucher and voucher is None:
             return error_messages['voucher_required']
 

src/tests/presale/test_cart.py

@@ -46,6 +46,29 @@ class CartTestMixin:
 
 
 class CartTest(CartTestMixin, TestCase):
+
+    def test_after_presale(self):
+        self.event.presale_end = now() - timedelta(days=1)
+        self.event.save()
+        response = self.client.post('/%s/%s/cart/add' % (self.orga.slug, self.event.slug), {
+            'item_%d' % self.ticket.id: '1'
+        }, follow=True)
+        self.assertRedirects(response, '/%s/%s/' % (self.orga.slug, self.event.slug),
+                             target_status_code=200)
+        assert 'alert-danger' in response.rendered_content
+        assert not CartPosition.objects.filter(cart_id=self.session_key, event=self.event).exists()
+
+    def test_before_presale(self):
+        self.event.presale_start = now() + timedelta(days=1)
+        self.event.save()
+        response = self.client.post('/%s/%s/cart/add' % (self.orga.slug, self.event.slug), {
+            'item_%d' % self.ticket.id: '1'
+        }, follow=True)
+        self.assertRedirects(response, '/%s/%s/' % (self.orga.slug, self.event.slug),
+                             target_status_code=200)
+        assert 'alert-danger' in response.rendered_content
+        assert not CartPosition.objects.filter(cart_id=self.session_key, event=self.event).exists()
+
     def test_simple(self):
         response = self.client.post('/%s/%s/cart/add' % (self.orga.slug, self.event.slug), {
             'item_%d' % self.ticket.id: '1'
@@ -355,9 +378,10 @@ class CartTest(CartTestMixin, TestCase):
             price=23, expires=now() + timedelta(minutes=10)
         )
         self.client.post('/%s/%s/cart/add' % (self.orga.slug, self.event.slug), {
+            'variation_%d_%d' % (self.shirt.id, self.shirt_red.id): '1'
         }, follow=True)
-        cp = CartPosition.objects.get(id=cp.id)
-        self.assertGreater(cp.expires, now())
+        cp.refresh_from_db()
+        self.assertGreater(cp.expires, now() + timedelta(minutes=10))
 
     def test_renew_expired_successfully(self):
         cp1 = CartPosition.objects.create(