Upgrade to Django 2.1 (#710)

* Upgrade to Django 2.0

* more models

* i18n foo

* Update setup.py

* Fix Sentry exception PRETIXEU-JC

* Enforce slug uniqueness

* Import sorting

* Upgrade to Django 2.1

* Travis config

* Try to fix PostgreSQL failure

* Smaller test matrix

* staticfiles→static

* Include request in all authenticate() calls

src/tests/multidomain/test_plugin_handler.py

@@ -0,0 +1,47 @@
+import pytest
+from django.conf import settings
+from django.utils.timezone import now
+
+from pretix.base.models import Event, Organizer
+
+
+@pytest.fixture
+def event():
+    o = Organizer.objects.create(name='MRMCD', slug='mrmcd')
+    event = Event.objects.create(
+        organizer=o, name='MRMCD2015', slug='2015',
+        date_from=now(),
+    )
+    settings.SITE_URL = 'http://example.com'
+    return event
+
+
+@pytest.mark.django_db
+def test_require_plugin(event, client):
+    event.plugins = 'pretix.plugins.paypal'
+    event.live = True
+    event.save()
+    r = client.get('/mrmcd/2015/paypal/abort/', follow=False)
+    assert r.status_code == 302
+    event.plugins = ''
+    event.save()
+    r = client.get('/mrmcd/2015/paypal/abort/', follow=False)
+    assert r.status_code == 404
+
+
+@pytest.mark.django_db
+def test_require_live(event, client):
+    event.plugins = 'pretix.plugins.paypal'
+    event.live = True
+    event.save()
+    r = client.get('/mrmcd/2015/paypal/abort/', follow=False)
+    assert r.status_code == 302
+    r = client.get('/mrmcd/2015/paypal/webhook/', follow=False)
+    assert r.status_code == 405
+
+    event.live = False
+    event.save()
+    r = client.get('/mrmcd/2015/paypal/abort/', follow=False)
+    assert r.status_code == 403
+    r = client.get('/mrmcd/2015/paypal/webhook/', follow=False)
+    assert r.status_code == 405