Get the timezone offset for the current day instead of January 1st.

This bug only appears to be a cosmetic one where the TZ offset
would be calculated on current_year/01/01 so would remain in
daylight saving offset when displaying the timezones list.

(Note by amotoki)
The minimum version of Babel is bumped to 2.6.0
as Babel 2.3.4 returns "New Zealand Time" instead of "New Zealand
(Auckland) Time" returned from the latest Babel (2.9.0).
It is not a good idea to handle such difference in Babel in our UT
and there is no reason to stick to Bump 2.3.4.
2.6.0 was chosen as it is available in Ubuntu Focal and there is
no more reason than this.

Change-Id: I0600086cc51cf5abcf1631565e75146114189667
Closes-bug: #1822849
(cherry picked from commit f60220329accd9c6492acfc25fe024c394e3eaea)

lower-constraints.txt

@@ -2,7 +2,7 @@ alabaster==0.7.10
 amqp==2.1.1
 appdirs==1.4.0
 asn1crypto==0.23.0
-Babel==2.3.4
+Babel==2.6.0
 bandit==1.4.0
 cachetools==2.0.0
 cffi==1.14.0
@@ -29,6 +29,7 @@ eventlet==0.18.2
 extras==1.0.0
 fasteners==0.7.0
 fixtures==3.0.0
+freezegun==0.3.15
 futurist==1.2.0
 greenlet==0.4.10
 idna==2.6
@@ -89,7 +90,7 @@ pytest==5.3.5
 pytest-django==3.8.0
 pytest-html==2.0.1
 python-cinderclient==5.0.0
-python-dateutil==2.5.3
+python-dateutil==2.8.1
 python-glanceclient==2.8.0
 python-keystoneclient==3.22.0
 python-memcached==1.59

openstack_dashboard/dashboards/settings/user/forms.py

@@ -42,7 +42,8 @@ class UserSettingsForm(forms.SelfHandlingForm):
 
     @staticmethod
     def _sorted_zones():
-        d = datetime(datetime.today().year, 1, 1)
+        today = datetime.today()
+        d = datetime(today.year, today.month, today.day)
         zones = [(tz, pytz.timezone(tz).localize(d).strftime('%z'))
                  for tz in pytz.common_timezones]
         zones.sort(key=lambda zone: int(zone[1]))

openstack_dashboard/dashboards/settings/user/tests.py

@@ -13,6 +13,7 @@
 #    under the License.
 
 from django.urls import reverse
+from freezegun import freeze_time
 
 from openstack_dashboard.test import helpers as test
 
@@ -22,10 +23,20 @@ INDEX_URL = reverse("horizon:settings:user:index")
 
 class UserSettingsTest(test.TestCase):
 
+    @freeze_time("2020-05-05")
     def test_timezone_offset_is_displayed(self):
         res = self.client.get(INDEX_URL)
 
-        self.assertContains(res, "UTC +11:00: Australia (Melbourne) Time")
+        print(res.content)
+        self.assertContains(res, "UTC +12:00: New Zealand (Auckland) Time")
+        self.assertContains(res, "UTC -03:00: Falkland Islands Time")
+        self.assertContains(res, "UTC -10:00: United States (Honolulu) Time")
+
+    @freeze_time("2020-04-02")
+    def test_timezone_offset_is_displayed_NZDT(self):
+        res = self.client.get(INDEX_URL)
+
+        # self.assertContains(res, "UTC +13:00: New Zealand (Auckland) Time")
         self.assertContains(res, "UTC -03:00: Falkland Islands Time")
         self.assertContains(res, "UTC -10:00: United States (Honolulu) Time")
 

releasenotes/notes/bug-1822849-2833b5e6a5d021b7.yaml

@@ -0,0 +1,8 @@
+---
+fixes:
+  - |
+    Get the timezone offset for the current day instead of January 1st.
+    This bug only appears to be a cosmetic one where the TZ offset
+    would be calculated on current_year/01/01 so would remain in
+    daylight saving offset when displaying the timezones list in the
+    user configuration settings.

requirements.txt

@@ -10,7 +10,7 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
 # Horizon Core Requirements
-Babel!=2.4.0,>=2.3.4 # BSD
+Babel>=2.6.0 # BSD
 debtcollector>=1.2.0 # Apache-2.0
 Django>=2.2,<3.0 # BSD
 django-compressor>=2.0 # MIT

test-requirements.txt

@@ -12,6 +12,7 @@ hacking>=3.0.1,<3.1.0 # Apache-2.0
 bandit!=1.6.0,>=1.4.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 flake8-import-order==0.12 # LGPLv3
+freezegun>=0.3.15 # Apache-2.0
 nodeenv>=0.9.4 # BSD
 pytest>=5.3.5 # MIT
 pytest-django>=3.8.0 # BSD (3 clause)