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- import pytest
- from pandas._libs.tslibs import offsets
- from pandas.tseries.frequencies import (
- is_subperiod,
- is_superperiod,
- )
- @pytest.mark.parametrize(
- "p1,p2,expected",
- [
- # Input validation.
- (offsets.MonthEnd(), None, False),
- (offsets.YearEnd(), None, False),
- (None, offsets.YearEnd(), False),
- (None, offsets.MonthEnd(), False),
- (None, None, False),
- (offsets.YearEnd(), offsets.MonthEnd(), True),
- (offsets.Hour(), offsets.Minute(), True),
- (offsets.Second(), offsets.Milli(), True),
- (offsets.Milli(), offsets.Micro(), True),
- (offsets.Micro(), offsets.Nano(), True),
- ],
- )
- def test_super_sub_symmetry(p1, p2, expected):
- assert is_superperiod(p1, p2) is expected
- assert is_subperiod(p2, p1) is expected
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