47 lines
1.3 KiB
Python
47 lines
1.3 KiB
Python
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import pytest
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import pandas._testing as tm
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from pandas.core.arrays import DatetimeArray
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class TestAccumulator:
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def test_accumulators_freq(self):
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# GH#50297
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arr = DatetimeArray._from_sequence_not_strict(
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[
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"2000-01-01",
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"2000-01-02",
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"2000-01-03",
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],
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freq="D",
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)
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result = arr._accumulate("cummin")
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expected = DatetimeArray._from_sequence_not_strict(
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["2000-01-01"] * 3, freq=None
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)
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tm.assert_datetime_array_equal(result, expected)
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result = arr._accumulate("cummax")
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expected = DatetimeArray._from_sequence_not_strict(
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[
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"2000-01-01",
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"2000-01-02",
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"2000-01-03",
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],
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freq=None,
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)
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tm.assert_datetime_array_equal(result, expected)
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@pytest.mark.parametrize("func", ["cumsum", "cumprod"])
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def test_accumulators_disallowed(self, func):
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# GH#50297
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arr = DatetimeArray._from_sequence_not_strict(
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[
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"2000-01-01",
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"2000-01-02",
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],
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freq="D",
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)
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with pytest.raises(TypeError, match=f"Accumulation {func}"):
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arr._accumulate(func)
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