New locking mechanism (#2408)

Co-authored-by: Richard Schreiber <schreiber@rami.io>

src/tests/base/test_locking.py

@@ -1,77 +0,0 @@
-#
-# This file is part of pretix (Community Edition).
-#
-# Copyright (C) 2014-2020 Raphael Michel and contributors
-# Copyright (C) 2020-2021 rami.io GmbH and contributors
-#
-# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
-# Public License as published by the Free Software Foundation in version 3 of the License.
-#
-# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
-# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
-# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
-# this file, see <https://pretix.eu/about/en/license>.
-#
-# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
-# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
-# details.
-#
-# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
-# <https://www.gnu.org/licenses/>.
-#
-import time
-
-import pytest
-from django.utils.timezone import now
-from django_scopes import scope, scopes_disabled
-
-from pretix.base.models import Event, Organizer
-from pretix.base.services import locking
-from pretix.base.services.locking import (
-    LockReleaseException, LockTimeoutException,
-)
-
-
-@pytest.fixture
-def event():
-    o = Organizer.objects.create(name='Dummy', slug='dummy')
-    event = Event.objects.create(
-        organizer=o, name='Dummy', slug='dummy',
-        date_from=now()
-    )
-    with scope(organizer=o):
-        yield event
-
-
-@pytest.mark.django_db
-def test_locking_exclusive(event):
-    with event.lock():
-        with pytest.raises(LockTimeoutException):
-            with scopes_disabled():
-                ev = Event.objects.get(id=event.id)
-                with ev.lock():
-                    pass
-
-
-@pytest.mark.django_db
-def test_locking_different_events(event):
-    other = Event.objects.create(
-        organizer=event.organizer, name='Dummy', slug='dummy2',
-        date_from=now()
-    )
-    with event.lock():
-        with other.lock():
-            pass
-
-
-@pytest.mark.django_db
-def test_lock_timeout_steal(event):
-    locking.LOCK_TIMEOUT = 1
-    locking.lock_event(event)
-    with pytest.raises(LockTimeoutException):
-        ev = Event.objects.get(id=event.id)
-        locking.lock_event(ev)
-    time.sleep(1.5)
-    locking.lock_event(ev)
-    with pytest.raises(LockReleaseException):
-        locking.release_event(event)