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TST: Test for merge_asof groupby=multiple with categorical column #30653

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Jan 3, 2020
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TST: Test for merge_asof groupby=multiple with categorical column #30653

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7 changes: 7 additions & 0 deletions pandas/tests/reshape/merge/test_merge_asof.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1185,6 +1185,13 @@ def test_merge_datatype_categorical_error_raises(self):
with pytest.raises(MergeError, match=msg):
merge_asof(left, right, on="a")

def test_merge_groupby_multiple_column_with_categorical_column(self):
# GH 16454
df = pd.DataFrame({"x": [0], "y": [0], "z": pd.Categorical([0])})
result = merge_asof(df, df, on="x", by=["y", "z"])
expected = pd.DataFrame({"x": [0], "y": [0], "z": pd.Categorical([0])})
tm.assert_frame_equal(result, expected)

@pytest.mark.parametrize(
"func", [lambda x: x, lambda x: to_datetime(x)], ids=["numeric", "datetime"]
)
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