1 files changed, 43 insertions, 0 deletions
diff --git a/tests/deprecation/test_use_l10n.py b/tests/deprecation/test_use_l10n.py
new file mode 100644
index 0000000000..0744e34ea0
--- /dev/null
+++ b/tests/deprecation/test_use_l10n.py
@@ -0,0 +1,43 @@
+import sys
+from types import ModuleType
+
+from django.conf import USE_L10N_DEPRECATED_MSG, Settings, settings
+from django.test import TestCase, ignore_warnings
+from django.utils.deprecation import RemovedInDjango50Warning
+
+
+class DeprecationTests(TestCase):
+    msg = USE_L10N_DEPRECATED_MSG
+
+    def test_override_settings_warning(self):
+        # Warning is raised when USE_L10N is set in UserSettingsHolder (used by
+        # the @override_settings decorator).
+        with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):
+            with self.settings(USE_L10N=True):
+                pass
+
+    def test_settings_init_warning(self):
+        settings_module = ModuleType('fake_settings_module')
+        settings_module.SECRET_KEY = 'foo'
+        settings_module.USE_TZ = True
+        settings_module.USE_L10N = False
+        sys.modules['fake_settings_module'] = settings_module
+        try:
+            with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):
+                Settings('fake_settings_module')
+        finally:
+            del sys.modules['fake_settings_module']
+
+    def test_access_warning(self):
+        with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):
+            settings.USE_L10N
+        # Works a second time.
+        with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):
+            settings.USE_L10N
+
+    @ignore_warnings(category=RemovedInDjango50Warning)
+    def test_access(self):
+        with self.settings(USE_L10N=False):
+            self.assertIs(settings.USE_L10N, False)
+            # Works a second time.
+            self.assertIs(settings.USE_L10N, False)