mirror of
https://github.com/blakeblackshear/frigate.git
synced 2026-09-26 12:08:59 +03:00
Josh Hawkins
51eaae4857
`get_dst_transitions` probed the offset once every 24 hours from the start time and reported a change at the first probe after it, up to a day late, so events, review items and recordings near a transition were grouped into days with the old offset. A transition after the last daily probe wasn't found at all. The end of the range is probed too now, and a probe that sees the offset change bisects the interval to the second of the transition.
55 lines
2.1 KiB
Python
55 lines
2.1 KiB
Python
"""Tests for get_dst_transitions."""
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import datetime
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import unittest
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from frigate.util.time import get_dst_transitions
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class TestDstTransitions(unittest.TestCase):
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def test_dst_transition_splits_periods_at_the_transition(self):
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start = datetime.datetime(2026, 3, 7, 12, tzinfo=datetime.UTC).timestamp()
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end = start + 2 * 86400
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spring = datetime.datetime(2026, 3, 8, 7, tzinfo=datetime.UTC).timestamp()
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self.assertEqual(
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get_dst_transitions("America/New_York", start, end),
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[(start, spring, -18000), (spring, end, -14400)],
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)
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def test_dst_transition_is_not_reported_a_day_late(self):
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# local midnight on the day of the change used to report the
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# transition a full day after it actually happened
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start = datetime.datetime(2024, 3, 10, 5, tzinfo=datetime.UTC).timestamp()
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end = start + 3 * 86400
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spring = datetime.datetime(2024, 3, 10, 7, tzinfo=datetime.UTC).timestamp()
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self.assertEqual(
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get_dst_transitions("America/New_York", start, end),
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[(start, spring, -18000), (spring, end, -14400)],
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)
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def test_dst_transition_after_the_last_daily_probe_is_found(self):
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start = datetime.datetime(2024, 11, 2, 12, tzinfo=datetime.UTC).timestamp()
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end = datetime.datetime(2024, 11, 3, 10, tzinfo=datetime.UTC).timestamp()
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fall = datetime.datetime(2024, 11, 3, 6, tzinfo=datetime.UTC).timestamp()
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self.assertEqual(
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get_dst_transitions("America/New_York", start, end),
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[(start, fall, -14400), (fall, end, -18000)],
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)
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def test_no_transition_returns_a_single_period(self):
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start = datetime.datetime(2026, 6, 1, tzinfo=datetime.UTC).timestamp()
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end = start + 5 * 86400
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self.assertEqual(
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get_dst_transitions("America/New_York", start, end),
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[(start, end, -14400)],
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)
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def test_invalid_zone_retains_utc_fallback(self):
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self.assertEqual(
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get_dst_transitions("Invalid/Timezone", 100, 200), [(100, 200, 0)]
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)
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if __name__ == "__main__":
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unittest.main(verbosity=2)
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