Fixed #21161 -- Timezone-related tests on Windows.

Thanks Xelnor for the patch.

AUTHORS

@@ -96,6 +96,7 @@ answer newbie questions, and generally made Django that much better:
     Mikaël Barbero <mikael.barbero nospam at nospam free.fr>
     Randy Barlow <randy@electronsweatshop.com>
     Scott Barr <scott@divisionbyzero.com.au>
+    Raphaël Barrois <raphael.barrois@m4x.org>
     Jiri Barton
     Jorge Bastida <me@jorgebastida.com>
     Ned Batchelder <http://www.nedbatchelder.com/>

tests/template_tests/filters.py

@@ -10,7 +10,7 @@ from __future__ import unicode_literals
 
 from datetime import date, datetime, time, timedelta
 
-from django.test.utils import str_prefix
+from django.test.utils import str_prefix, TZ_SUPPORT
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.safestring import mark_safe
 from django.utils import timezone
@@ -56,9 +56,10 @@ def get_filter_tests():
         'filter-timesince10': ('{{ later|timesince:now }}', { 'now': now, 'later': now + timedelta(days=7) }, '0\xa0minutes'),
 
         # Ensures that differing timezones are calculated correctly
+        # Tests trying to compare a timezone-aware 'now' to now aren't supported on no-tz-support systems (e.g Windows).
         'filter-timesince11' : ('{{ a|timesince }}', {'a': now}, '0\xa0minutes'),
-        'filter-timesince12' : ('{{ a|timesince }}', {'a': now_tz}, '0\xa0minutes'),
-        'filter-timesince13' : ('{{ a|timesince }}', {'a': now_tz_i}, '0\xa0minutes'),
+        'filter-timesince12' : ('{{ a|timesince }}', {'a': now_tz}, '0\xa0minutes') if TZ_SUPPORT else ('', {}, ''),
+        'filter-timesince13' : ('{{ a|timesince }}', {'a': now_tz_i}, '0\xa0minutes') if TZ_SUPPORT else ('', {}, ''),
         'filter-timesince14' : ('{{ a|timesince:b }}', {'a': now_tz, 'b': now_tz_i}, '0\xa0minutes'),
         'filter-timesince15' : ('{{ a|timesince:b }}', {'a': now, 'b': now_tz_i}, ''),
         'filter-timesince16' : ('{{ a|timesince:b }}', {'a': now_tz_i, 'b': now}, ''),
@@ -83,12 +84,14 @@ def get_filter_tests():
         'filter-timeuntil09': ('{{ later|timeuntil:now }}', { 'now': now, 'later': now + timedelta(days=7) }, '1\xa0week'),
 
         # Ensures that differing timezones are calculated correctly
-        'filter-timeuntil10' : ('{{ a|timeuntil }}', {'a': now_tz_i}, '0\xa0minutes'),
-        'filter-timeuntil11' : ('{{ a|timeuntil:b }}', {'a': now_tz_i, 'b': now_tz}, '0\xa0minutes'),
+        # Tests trying to compare a timezone-aware 'now' to now aren't supported on no-tz-support systems (e.g Windows).
+        'filter-timeuntil10' : ('{{ a|timeuntil }}', {'a': now_tz}, '0\xa0minutes') if TZ_SUPPORT else ('', {}, ''),
+        'filter-timeuntil11' : ('{{ a|timeuntil }}', {'a': now_tz_i}, '0\xa0minutes') if TZ_SUPPORT else ('', {}, ''),
+        'filter-timeuntil12' : ('{{ a|timeuntil:b }}', {'a': now_tz_i, 'b': now_tz}, '0\xa0minutes'),
 
         # Regression for #9065 (two date objects).
-        'filter-timeuntil12' : ('{{ a|timeuntil:b }}', {'a': today, 'b': today}, '0\xa0minutes'),
-        'filter-timeuntil13' : ('{{ a|timeuntil:b }}', {'a': today, 'b': today - timedelta(hours=24)}, '1\xa0day'),
+        'filter-timeuntil13' : ('{{ a|timeuntil:b }}', {'a': today, 'b': today}, '0\xa0minutes'),
+        'filter-timeuntil14' : ('{{ a|timeuntil:b }}', {'a': today, 'b': today - timedelta(hours=24)}, '1\xa0day'),
 
         'filter-addslash01': ("{% autoescape off %}{{ a|addslashes }} {{ b|addslashes }}{% endautoescape %}", {"a": "<a>'", "b": mark_safe("<a>'")}, r"<a>\' <a>\'"),
         'filter-addslash02': ("{{ a|addslashes }} {{ b|addslashes }}", {"a": "<a>'", "b": mark_safe("<a>'")}, r"&lt;a&gt;\&#39; <a>\'"),

tests/utils_tests/test_timesince.py

@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 import datetime
 import unittest
 
+from django.test.utils import requires_tz_support
 from django.utils.timesince import timesince, timeuntil
 from django.utils import timezone
 
@@ -93,6 +94,7 @@ class TimesinceTests(unittest.TestCase):
         self.assertEqual(timesince(self.t,
             self.t-4*self.oneday-5*self.oneminute), '0\xa0minutes')
 
+    @requires_tz_support
     def test_different_timezones(self):
         """ When using two different timezones. """
         now = datetime.datetime.now()
@@ -101,6 +103,11 @@ class TimesinceTests(unittest.TestCase):
 
         self.assertEqual(timesince(now), '0\xa0minutes')
         self.assertEqual(timesince(now_tz), '0\xa0minutes')
+        self.assertEqual(timesince(now_tz_i), '0\xa0minutes')
+        self.assertEqual(timesince(now_tz, now_tz_i), '0\xa0minutes')
+        self.assertEqual(timeuntil(now), '0\xa0minutes')
+        self.assertEqual(timeuntil(now_tz), '0\xa0minutes')
+        self.assertEqual(timeuntil(now_tz_i), '0\xa0minutes')
         self.assertEqual(timeuntil(now_tz, now_tz_i), '0\xa0minutes')
 
     def test_date_objects(self):