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28 changes: 11 additions & 17 deletions pandas/tests/series/indexing/test_boolean.py
Original file line number Diff line number Diff line change
Expand Up @@ -160,28 +160,22 @@ def test_where_unsafe_float(float_dtype):
assert_series_equal(s, expected)


@pytest.mark.parametrize("dtype", [np.int64, np.float64])
def test_where_unsafe_upcast(dtype):
s = Series(np.arange(10), dtype=dtype)
values = [2.5, 3.5, 4.5, 5.5, 6.5]

mask = s < 5
expected = Series(values + lrange(5, 10), dtype="float64")

s[mask] = values
assert_series_equal(s, expected)


@pytest.mark.parametrize("dtype", [
np.int8, np.int16, np.int32, np.float32
@pytest.mark.parametrize("dtype,expected_dtype", [
(np.int8, np.float64),
(np.int16, np.float64),
(np.int32, np.float64),
(np.int64, np.float64),
(np.float32, np.float32),
(np.float64, np.float64)
])
def test_where_upcast(dtype):
def test_where_unsafe_upcast(dtype, expected_dtype):
# see gh-9743
s = Series(np.arange(10), dtype=dtype)
mask = s < 5

values = [2.5, 3.5, 4.5, 5.5, 6.5]
mask = s < 5
expected = Series(values + lrange(5, 10), dtype=expected_dtype)
s[mask] = values
assert_series_equal(s, expected)


def test_where_unsafe():
Expand Down