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test(python): Add test for Series.to_numpy with timezones #14337

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Feb 7, 2024
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test(python): Add test for Series.to_numpy with timezones #14337

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20 changes: 20 additions & 0 deletions py-polars/tests/unit/interop/numpy/test_to_numpy_series.py
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Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,16 @@ def test_series_to_numpy_temporal_zero_copy(
assert result.dtype == expected_dtype


def test_series_to_numpy_datetime_with_tz_zero_copy() -> None:
values = [datetime(1970, 1, 1), datetime(2024, 2, 28)]
s = pl.Series(values).dt.convert_time_zone("Europe/Amsterdam")
result = s.to_numpy(use_pyarrow=False, zero_copy_only=True)

assert_zero_copy(s, result)
assert result.tolist() == values
assert result.dtype == np.dtype("datetime64[us]")


def test_series_to_numpy_date() -> None:
values = [date(1970, 1, 1), date(2024, 2, 28)]
s = pl.Series(values)
Expand Down Expand Up @@ -152,6 +162,16 @@ def test_series_to_numpy_temporal_with_nulls(
assert_zero_copy_only_raises(s)


def test_series_to_numpy_datetime_with_tz_with_nulls() -> None:
values = [datetime(1970, 1, 1), datetime(2024, 2, 28), None]
s = pl.Series(values).dt.convert_time_zone("Europe/Amsterdam")
result = s.to_numpy(use_pyarrow=False)

assert result.tolist() == values
assert result.dtype == np.dtype("datetime64[us]")
assert_zero_copy_only_raises(s)


@pytest.mark.parametrize(
("dtype", "values"),
[
Expand Down
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