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TST: GH23452 test reorder_categories() on categorical index #36648

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Merged
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Oct 3, 2020
Merged

TST: GH23452 test reorder_categories() on categorical index #36648

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TST: GH23452 test reorder_categories() on categorical index
fokoid Sep 25, 2020
c1d9515
TST: GH23452 make test more robust for future parameterizations
fokoid Sep 26, 2020
a240620
TST: GH23452 improve symbol names per review comment
fokoid Sep 26, 2020
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28 changes: 28 additions & 0 deletions pandas/tests/indexing/test_categorical.py
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Original file line number Diff line number Diff line change
Expand Up @@ -807,3 +807,31 @@ def test_loc_with_non_string_categories(self, idx_values, ordered):
result.loc[sl, "A"] = ["qux", "qux2"]
expected = DataFrame({"A": ["qux", "qux2", "baz"]}, index=cat_idx)
tm.assert_frame_equal(result, expected)

@pytest.mark.parametrize(
"categories",
[
pytest.param(["a", "b", "c"], id="str"),
pytest.param(
[pd.Interval(0, 1), pd.Interval(1, 2), pd.Interval(2, 3)],
id="pd.Interval",
),
],
)
def test_reorder_index_with_categories(self, categories):
# GH23452
df = DataFrame(
{"foo": range(len(categories))},
index=CategoricalIndex(
data=categories, categories=categories, ordered=True
),
)
df.index = df.index.reorder_categories(df.index.categories[::-1])
result = df.sort_index()
expected = DataFrame(
{"foo": reversed(range(len(categories)))},
index=CategoricalIndex(
data=categories[::-1], categories=categories[::-1], ordered=True
),
)
tm.assert_frame_equal(result, expected)