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