[3.0.x] Fixed #31056 -- Allowed disabling async-unsafe check with an environment variable.

Backport of c90ab30fa1305481024b9c3c50b5a6ed6cd9a2f5 from master

1 files changed, 12 insertions, 1 deletions

diff --git a/tests/async/tests.py b/tests/async/tests.py
index 450a38018d..f42e549075 100644
--- a/tests/async/tests.py
+++ b/tests/async/tests.py
@@ -1,5 +1,6 @@
+import os
 import sys
-from unittest import skipIf
+from unittest import mock, skipIf
 
 from asgiref.sync import async_to_sync
 
@@ -39,3 +40,13 @@ class AsyncUnsafeTest(SimpleTestCase):
         )
         with self.assertRaisesMessage(SynchronousOnlyOperation, msg):
             self.dangerous_method()
+
+    @mock.patch.dict(os.environ, {'DJANGO_ALLOW_ASYNC_UNSAFE': 'true'})
+    @async_to_sync
+    async def test_async_unsafe_suppressed(self):
+        # Decorator doesn't trigger check when the environment variable to
+        # suppress it is set.
+        try:
+            self.dangerous_method()
+        except SynchronousOnlyOperation:
+            self.fail('SynchronousOnlyOperation should not be raised.')