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django/tests/async/tests.py
Andrew Godwin a415ce70be Fixed #30451 -- Added ASGI handler and coroutine-safety.
This adds an ASGI handler, asgi.py file for the default project layout,
a few async utilities and adds async-safety to many parts of Django.
2019-06-20 12:29:43 +02:00

37 lines
1.1 KiB
Python

from asgiref.sync import async_to_sync
from django.core.exceptions import SynchronousOnlyOperation
from django.test import SimpleTestCase
from django.utils.asyncio import async_unsafe
from .models import SimpleModel
class DatabaseConnectionTest(SimpleTestCase):
"""A database connection cannot be used in an async context."""
@async_to_sync
async def test_get_async_connection(self):
with self.assertRaises(SynchronousOnlyOperation):
list(SimpleModel.objects.all())
class AsyncUnsafeTest(SimpleTestCase):
"""
async_unsafe decorator should work correctly and returns the correct
message.
"""
@async_unsafe
def dangerous_method(self):
return True
@async_to_sync
async def test_async_unsafe(self):
# async_unsafe decorator catches bad access and returns the right
# message.
msg = (
'You cannot call this from an async context - use a thread or '
'sync_to_async.'
)
with self.assertRaisesMessage(SynchronousOnlyOperation, msg):
self.dangerous_method()