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Merged
merged 13 commits into from
Feb 1, 2022
Merged

Test to datetime null to NaT #45512

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f67ffe3
Testing to_datetime, converting none to NaT
Aug 12, 2021
908c202
Testing to_datetime, converting NA/NaN to NaT
Aug 12, 2021
bfbfb62
Fix linting issues - move test near other related ones.
Aug 20, 2021
ab1851b
Fix CI error: function uses no argument 'cache'
Aug 20, 2021
479a978
Testing to_datetime, converting none to NaT
Aug 12, 2021
b0fe84e
Testing to_datetime, converting NA/NaN to NaT
Aug 12, 2021
a79d754
Fix linting issues - move test near other related ones.
Aug 20, 2021
da9fa35
Fix CI error: function uses no argument 'cache'
Aug 20, 2021
1f41a89
Merge branch 'test_to_datetime_null_to_NaT' of github.com:ryangilmour…
Jan 20, 2022
dadf5fd
reduce test case series sizes
Jan 21, 2022
53335df
ignore list item in type checking
Jan 23, 2022
68ce176
Merge branch 'main' into test_to_datetime_null_to_NaT
Jan 31, 2022
b3862a3
test caching and non-caching behaviour
Jan 31, 2022
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27 changes: 27 additions & 0 deletions pandas/tests/tools/test_to_datetime.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1066,6 +1066,33 @@ def test_convert_object_to_datetime_with_cache(
)
tm.assert_series_equal(result_series, expected_series)

@pytest.mark.parametrize("cache", [True, False])
@pytest.mark.parametrize(
("input", "expected"),
(
(
Series([NaT] * 20 + [None] * 20, dtype="object"), # type: ignore[list-item] # noqa: E501
Series([NaT] * 40, dtype="datetime64[ns]"),
),
(
Series([NaT] * 60 + [None] * 60, dtype="object"), # type: ignore[list-item] # noqa: E501
Series([NaT] * 120, dtype="datetime64[ns]"),
),
(Series([None] * 20), Series([NaT] * 20, dtype="datetime64[ns]")),
(Series([None] * 60), Series([NaT] * 60, dtype="datetime64[ns]")),
(Series([""] * 20), Series([NaT] * 20, dtype="datetime64[ns]")),
(Series([""] * 60), Series([NaT] * 60, dtype="datetime64[ns]")),
(Series([pd.NA] * 20), Series([NaT] * 20, dtype="datetime64[ns]")),
(Series([pd.NA] * 60), Series([NaT] * 60, dtype="datetime64[ns]")),
(Series([np.NaN] * 20), Series([NaT] * 20, dtype="datetime64[ns]")),
(Series([np.NaN] * 60), Series([NaT] * 60, dtype="datetime64[ns]")),
),
)
def test_to_datetime_converts_null_like_to_nat(self, cache, input, expected):
# GH35888
result = to_datetime(input, cache=cache)
tm.assert_series_equal(result, expected)

@pytest.mark.parametrize(
"date, format",
[
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