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add test for fillna with column #39323

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add test for fillna with column #39323

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10 changes: 10 additions & 0 deletions pandas/tests/series/methods/test_fillna.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,16 @@


class TestSeriesFillNA:
def test_fillna_column(self):
series1 = np.random.randint(5,30,size=13)
series2 = np.random.randint(5, 30, size=13)
series2[-1] = np.nan
series2[3] = pd.NaT
series2_backup = series2.copy()
series2.fillna(value=series1, inplace=True)
assert series2 != series2_backup
assert not any(series2.isna())

def test_fillna_nat(self):
series = Series([0, 1, 2, NaT.value], dtype="M8[ns]")

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