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| import pytest
|
| from pandas import (
| Period,
| PeriodIndex,
| Series,
| period_range,
| )
| import pandas._testing as tm
|
|
| @pytest.mark.parametrize(
| "cons",
| [
| lambda x: PeriodIndex(x),
| lambda x: PeriodIndex(PeriodIndex(x)),
| ],
| )
| def test_periodindex(using_copy_on_write, cons):
| dt = period_range("2019-12-31", periods=3, freq="D")
| ser = Series(dt)
| idx = cons(ser)
| expected = idx.copy(deep=True)
| ser.iloc[0] = Period("2020-12-31")
| if using_copy_on_write:
| tm.assert_index_equal(idx, expected)
|
|
