Use timezone aware timestamps in tests

Issue #892
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/trans/tests/test_naturaldate.py

@@ -24,6 +24,7 @@ Testing of natural time conversion.
 from unittest import TestCase
 from weblate.trans.templatetags.translations import naturaltime
 import datetime
+from django.utils import timezone
 
 TEST_DATA = (
     (0, 'now'),
@@ -60,7 +61,7 @@ TEST_DATA = (
 
 class NaturalTimeTest(TestCase):
     def test_natural(self):
-        now = datetime.datetime.now()
+        now = timezone.now()
         for diff, expected in TEST_DATA:
             testdate = now + datetime.timedelta(seconds=diff)
             result = naturaltime(testdate, now)

weblate/trans/tests/test_vcs.py

@@ -27,7 +27,7 @@ from django.test import TestCase
 import tempfile
 import shutil
 import os.path
-import datetime
+from django.utils import timezone
 
 
 class GithubFakeRepository(GithubRepository):
@@ -116,7 +116,7 @@ class VCSGitTest(RepoTestCase):
             repo.commit(
                 'Test commit',
                 'Foo Bar <foo@bar.com>',
-                datetime.datetime.now(),
+                timezone.now(),
                 [filename]
             )
 
@@ -290,7 +290,7 @@ class VCSGitTest(RepoTestCase):
         self.repo.commit(
             'Test commit',
             'Foo Bar <foo@bar.com>',
-            datetime.datetime.now(),
+            timezone.now(),
             ['testfile']
         )
         # Check we have new revision