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import pytest
from pandas import (
Period,
PeriodIndex,
Series,
period_range,
)
import pandas._testing as tm
pytestmark = pytest.mark.filterwarnings(
"ignore:Setting a value on a view:FutureWarning"
)
@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)