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7 changes: 7 additions & 0 deletions pandas/tests/arithmetic/common.py
Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,13 @@ def assert_invalid_comparison(left, right, box):
"Cannot compare type",
"not supported between",
"invalid type promotion",
(
# GH#36706 npdev 1.20.0 2020-09-28
r"The DTypes <class 'numpy.dtype\[datetime64\]'> and "
r"<class 'numpy.dtype\[int64\]'> do not have a common DType. "
"For example they cannot be stored in a single array unless the "
"dtype is `object`."
),
]
)
with pytest.raises(TypeError, match=msg):
Expand Down
5 changes: 5 additions & 0 deletions pandas/tests/frame/test_arithmetic.py
Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,11 @@ def check(df, df2):
msgs = [
r"Invalid comparison between dtype=datetime64\[ns\] and ndarray",
"invalid type promotion",
(
# npdev 1.20.0
r"The DTypes <class 'numpy.dtype\[.*\]'> and "
r"<class 'numpy.dtype\[.*\]'> do not have a common DType."
),
]
msg = "|".join(msgs)
with pytest.raises(TypeError, match=msg):
Expand Down