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TST:Add test to check single category col returns series with single row slice #29521

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Merged
merged 4 commits into from
Nov 10, 2019
Merged

TST:Add test to check single category col returns series with single row slice #29521

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7896908
Add test for single cat col check returns series
ryankarlos Nov 10, 2019
b20c33e
Fix Linting
ryankarlos Nov 10, 2019
7898b1b
Add issue number
ryankarlos Nov 10, 2019
bcb5fd2
define result before tm.assert
ryankarlos Nov 10, 2019
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9 changes: 9 additions & 0 deletions pandas/tests/frame/test_dtypes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -762,6 +762,15 @@ def test_astype_categoricaldtype_class_raises(self, cls):
with pytest.raises(TypeError, match=xpr):
df["A"].astype(cls)

def test_singlerow_slice_categoricaldtype_gives_series(self):
# GH29521
df = pd.DataFrame({"x": pd.Categorical("a b c d e".split())})
result = df.iloc[0]
raw_cat = pd.Categorical(["a"], categories=["a", "b", "c", "d", "e"])
expected = pd.Series(raw_cat, index=["x"], name=0, dtype="category")

tm.assert_series_equal(result, expected)

@pytest.mark.parametrize("dtype", ["Int64", "Int32", "Int16"])
def test_astype_extension_dtypes(self, dtype):
# GH 22578
Expand Down