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TST: add test for df.where() with category dtype #29454

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Merged
merged 5 commits into from
Nov 8, 2019
Merged

TST: add test for df.where() with category dtype #29454

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e605559
add test for df where with category dtype
ganevgv Nov 7, 2019
062d281
use parameterization
ganevgv Nov 7, 2019
c7913ab
add new test for astype category
ganevgv Nov 7, 2019
35e91f9
format test
ganevgv Nov 8, 2019
602ac06
remove test for astype category
ganevgv Nov 8, 2019
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13 changes: 13 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 @@ -815,6 +815,19 @@ def test_astype_extension_dtypes_duplicate_col(self, dtype):
expected = concat([a1.astype(dtype), a2.astype(dtype)], axis=1)
tm.assert_frame_equal(result, expected)

def test_df_where_with_category(self):
# GH 16979
df = DataFrame(np.arange(2 * 3).reshape(2, 3), columns=list("ABC"))
mask = np.array([[True, False, True], [False, True, True]])
# change type to category
df.A = df.A.astype("category")
df.B = df.B.astype("category")
df.C = df.C.astype("category")

expected = df.A.where(mask[:, 0])
result = df.A.where(mask[:, 0], other=None)
tm.assert_series_equal(result, expected)

@pytest.mark.parametrize(
"dtype", [{100: "float64", 200: "uint64"}, "category", "float64"]
)
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