Function test_groupby_reductions

pandas/tests/arrays/integer/test_reduction.py:75–85

(op, expected)

    ],
)
def test_groupby_reductions(op, expected):
    df = DataFrame(
        {
            "A": ["a", "b", "b"],
            "B": array([1, None, 3], dtype="Int64"),
        }
    )
    result = getattr(df.groupby("A"), op)()
    expected = DataFrame(expected, index=pd.Index(["a", "b"], name="A"), columns=["B"])

    tm.assert_frame_equal(result, expected)


@pytest.mark.parametrize(