mirror of https://github.com/mahmoud/boltons.git
56 lines
2.1 KiB
Python
56 lines
2.1 KiB
Python
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from datetime import timedelta, date
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from boltons.timeutils import total_seconds, daterange
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def test_float_total_seconds():
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"""Check for floating point precision loss per
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http://bugs.python.org/issue8644 and tests in the corresponding
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diff, spurred by
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https://github.com/mahmoud/boltons/pull/13#issuecomment-93835612 .
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The funny thing is that floating point precision loss is
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definitely happening. With or without true division, in Python
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2.7's native timedelta.total_seconds() as well as
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dateutils.total_seconds. The constants in the tests below are from
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manual tests on Python 2.7.6 final. 2.6 does vary slightly, but it
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might just be a repr change.
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With these tests in mind, I'm not sure why the Python issue got
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created in the first place.
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"""
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assert total_seconds(timedelta(microseconds=1)) == 1e-06
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assert total_seconds(timedelta(microseconds=-1)) == -1e-06
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assert total_seconds(timedelta(microseconds=-2)) == -2e-06
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assert total_seconds(timedelta(days=2 ** 29, microseconds=1)) == 46385646796800.0
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assert total_seconds(timedelta(seconds=123456.789012)) == 123456.789012
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assert total_seconds(timedelta(seconds=-123456.789012)) == -123456.789012
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def test_daterange_years():
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new_year = date(2017, 1, 1)
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bit_rollover = date(2038, 1, 19)
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new_years_remaining = daterange(new_year, bit_rollover, step=(1, 0, 0))
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assert len(list(new_years_remaining)) == 22
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y2025 = date(2025, 1, 1)
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bakers_years_til_2025 = list(daterange(new_year, y2025, step=(1, 1, 0)))
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assert len(bakers_years_til_2025) == 8
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assert bakers_years_til_2025[-1] == date(2024, 8, 1)
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assert bakers_years_til_2025[-1] == date(2024, 8, 1)
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years_from_2025 = list(daterange(y2025, new_year, step=(-1, 0, 0),
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inclusive=True))
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assert years_from_2025[0] == date(2025, 1, 1)
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assert years_from_2025[-1] == date(2017, 1, 1)
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def test_daterange_infinite():
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today = date.today()
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infinite_dates = daterange(today, None)
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for i in range(10):
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assert next(infinite_dates) == today + timedelta(days=i)
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