Fixed #19708 -- Exception in timezone.override(None).

Thanks rafales.

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/regressiontests/utils/timezone.py b/tests/regressiontests/utils/timezone.py
index 991600c8b9..650198e8ff 100644
--- a/tests/regressiontests/utils/timezone.py
+++ b/tests/regressiontests/utils/timezone.py
@@ -3,9 +3,14 @@ import datetime
 import pickle
 from django.test.utils import override_settings
 from django.utils import timezone
+from django.utils.tzinfo import FixedOffset
 from django.utils import unittest
 
 
+EAT = FixedOffset(180)      # Africa/Nairobi
+ICT = FixedOffset(420)      # Asia/Bangkok
+
+
 class TimezoneTests(unittest.TestCase):
 
     def test_localtime(self):
@@ -20,6 +25,31 @@ class TimezoneTests(unittest.TestCase):
         with override_settings(USE_TZ=False):
             self.assertTrue(timezone.is_naive(timezone.now()))
 
+    def test_override(self):
+        default = timezone.get_default_timezone()
+        try:
+            timezone.activate(ICT)
+
+            with timezone.override(EAT):
+                self.assertIs(EAT, timezone.get_current_timezone())
+            self.assertIs(ICT, timezone.get_current_timezone())
+
+            with timezone.override(None):
+                self.assertIs(default, timezone.get_current_timezone())
+            self.assertIs(ICT, timezone.get_current_timezone())
+
+            timezone.deactivate()
+
+            with timezone.override(EAT):
+                self.assertIs(EAT, timezone.get_current_timezone())
+            self.assertIs(default, timezone.get_current_timezone())
+
+            with timezone.override(None):
+                self.assertIs(default, timezone.get_current_timezone())
+            self.assertIs(default, timezone.get_current_timezone())
+        finally:
+            timezone.deactivate()
+
     def test_copy(self):
         self.assertIsInstance(copy.copy(timezone.UTC()), timezone.UTC)
         self.assertIsInstance(copy.copy(timezone.LocalTimezone()), timezone.LocalTimezone)