75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
import os
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import sys
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from unittest import mock, skipIf
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from asgiref.sync import async_to_sync
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from django.core.cache import DEFAULT_CACHE_ALIAS, caches
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from django.core.exceptions import SynchronousOnlyOperation
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from django.test import SimpleTestCase
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from django.utils.asyncio import async_unsafe
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from .models import SimpleModel
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@skipIf(
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sys.platform == "win32" and (3, 8, 0) < sys.version_info < (3, 8, 1),
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"https://bugs.python.org/issue38563",
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)
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class CacheTest(SimpleTestCase):
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def test_caches_local(self):
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@async_to_sync
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async def async_cache():
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return caches[DEFAULT_CACHE_ALIAS]
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cache_1 = async_cache()
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cache_2 = async_cache()
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self.assertIs(cache_1, cache_2)
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@skipIf(
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sys.platform == "win32" and (3, 8, 0) < sys.version_info < (3, 8, 1),
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"https://bugs.python.org/issue38563",
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)
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class DatabaseConnectionTest(SimpleTestCase):
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"""A database connection cannot be used in an async context."""
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async def test_get_async_connection(self):
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with self.assertRaises(SynchronousOnlyOperation):
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list(SimpleModel.objects.all())
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@skipIf(
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sys.platform == "win32" and (3, 8, 0) < sys.version_info < (3, 8, 1),
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"https://bugs.python.org/issue38563",
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)
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class AsyncUnsafeTest(SimpleTestCase):
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"""
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async_unsafe decorator should work correctly and returns the correct
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message.
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"""
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@async_unsafe
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def dangerous_method(self):
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return True
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async def test_async_unsafe(self):
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# async_unsafe decorator catches bad access and returns the right
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# message.
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msg = (
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"You cannot call this from an async context - use a thread or "
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"sync_to_async."
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)
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with self.assertRaisesMessage(SynchronousOnlyOperation, msg):
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self.dangerous_method()
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@mock.patch.dict(os.environ, {"DJANGO_ALLOW_ASYNC_UNSAFE": "true"})
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@async_to_sync # mock.patch() is not async-aware.
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async def test_async_unsafe_suppressed(self):
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# Decorator doesn't trigger check when the environment variable to
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# suppress it is set.
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try:
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self.dangerous_method()
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except SynchronousOnlyOperation:
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self.fail("SynchronousOnlyOperation should not be raised.")
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