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TST: Add additional test for future warning when call Series.str.cat(Series.str) #47755

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merged 5 commits into from
Jul 19, 2022
Merged

TST: Add additional test for future warning when call Series.str.cat(Series.str) #47755

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16280b6
fix 28277
xr-chen Jul 16, 2022
6fa0828
fix typo
xr-chen Jul 16, 2022
8033d67
add test
xr-chen Jul 18, 2022
775bc5a
Update pandas/tests/strings/test_cat.py
xr-chen Jul 19, 2022
49c0ef9
fix pep 8 issue, change comment symbol
xr-chen Jul 19, 2022
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19 changes: 19 additions & 0 deletions pandas/tests/strings/test_cat.py
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Original file line number Diff line number Diff line change
Expand Up @@ -376,3 +376,22 @@ def test_cat_different_classes(klass):
result = s.str.cat(klass(["x", "y", "z"]))
expected = Series(["ax", "by", "cz"])
tm.assert_series_equal(result, expected)


def test_cat_on_series_dot_str():
# GH 28277
# Test future warning of `Series.str.__iter__`
ps = Series(["AbC", "de", "FGHI", "j", "kLLLm"])
with tm.assert_produces_warning(FutureWarning):
ps.str.cat(others=ps.str)
# The following code will be uncommented if `Series.str.__iter__` is removed.
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"""
message = re.escape(
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"others must be Series, Index, DataFrame, np.ndarray "
"or list-like (either containing only strings or "
"containing only objects of type Series/Index/"
"np.ndarray[1-dim])"
)
with pytest.raises(TypeError, match=message):
ps.str.cat(others=ps.str)
"""