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55 lines
2.2 KiB
Python
55 lines
2.2 KiB
Python
import sys
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from datetime import datetime
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from django.utils.timezone import now as timezone_now
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from zerver.lib.test_classes import ZulipTestCase
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from zerver.lib.timezone import canonicalize_timezone, common_timezones
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if sys.version_info < (3, 9): # nocoverage
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from backports import zoneinfo
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else: # nocoverage
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import zoneinfo
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class TimeZoneTest(ZulipTestCase):
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def test_canonicalize_timezone(self) -> None:
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self.assertEqual(canonicalize_timezone("America/Los_Angeles"), "America/Los_Angeles")
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self.assertEqual(canonicalize_timezone("US/Pacific"), "America/Los_Angeles")
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self.assertEqual(canonicalize_timezone("Gondor/Minas_Tirith"), "Gondor/Minas_Tirith")
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def test_common_timezones(self) -> None:
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ambiguous_abbrevs = [
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("CDT", -18000.0), # Central Daylight Time
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("CDT", -14400.0), # Cuba Daylight Time
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("CST", -21600.0), # Central Standard Time
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("CST", +28800.0), # China Standard Time
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("CST", -18000.0), # Cuba Standard Time
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("PST", -28800.0), # Pacific Standard Time
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("PST", +28800.0), # Philippine Standard Time
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("IST", +19800.0), # India Standard Time
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("IST", +7200.0), # Israel Standard Time
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("IST", +3600.0), # Ireland Standard Time
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]
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missing = set(dict(reversed(ambiguous_abbrevs)).items()) - set(common_timezones.items())
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assert not missing, missing
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now = timezone_now()
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dates = [datetime(now.year, 6, 21), datetime(now.year, 12, 21)]
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extra = {*common_timezones.items(), *ambiguous_abbrevs}
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for name in zoneinfo.available_timezones():
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tz = zoneinfo.ZoneInfo(name)
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for date in dates:
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abbrev = tz.tzname(date)
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assert abbrev is not None
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if abbrev.startswith(("-", "+")):
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continue
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delta = tz.utcoffset(date)
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assert delta is not None
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offset = delta.total_seconds()
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assert (
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common_timezones[abbrev] == offset or (abbrev, offset) in ambiguous_abbrevs
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), (name, abbrev, offset)
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extra.discard((abbrev, offset))
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assert not extra, extra
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