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TST: additional regression cases for slicing blockwise op (GH34421) #34434

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Merged
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May 28, 2020
Merged

TST: additional regression cases for slicing blockwise op (GH34421) #34434

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15 changes: 12 additions & 3 deletions pandas/tests/frame/test_arithmetic.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1523,7 +1523,16 @@ def test_dataframe_blockwise_slicelike():
df2 = df1.copy()
df2.iloc[0, [1, 3, 7]] = np.nan

res = df1 + df2
df3 = df1.copy()
df3.iloc[0, [5]] = np.nan

expected = pd.DataFrame({i: df1[i] + df2[i] for i in df1.columns})
tm.assert_frame_equal(res, expected)
df4 = df1.copy()
df4.iloc[0, np.arange(2, 5)] = np.nan
df5 = df1.copy()
df5.iloc[0, np.arange(4, 7)] = np.nan

for left, right in [(df1, df2), (df2, df3), (df4, df5)]:
res = left + right

expected = pd.DataFrame({i: left[i] + right[i] for i in left.columns})
tm.assert_frame_equal(res, expected)