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TST: Add test to verify 'dropna' behaviour on SparseArray #34879

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Merged
merged 3 commits into from
Jun 20, 2020
Merged

TST: Add test to verify 'dropna' behaviour on SparseArray #34879

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dd4c22c
Add test to verify `dropna` behaviour on `pd.SparseArray`
MBrouns Jun 20, 2020
0526b8e
parametrize fill_value on SparseArray dropna test
MBrouns Jun 20, 2020
eb1f881
Update pandas/tests/arrays/sparse/test_array.py
MBrouns Jun 20, 2020
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11 changes: 11 additions & 0 deletions pandas/tests/arrays/sparse/test_array.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1295,3 +1295,14 @@ def test_map_missing():

result = arr.map({0: 10, 1: 11})
tm.assert_sp_array_equal(result, expected)


def test_dropna_sparse_column_doesnt_drop_nonna():
# GH-28287
arr = SparseArray([np.nan, 1])
exp = SparseArray([1.0])
tm.assert_sp_array_equal(arr.dropna(), exp)

df = pd.DataFrame({"a": [0, 1], "b": arr})
expected_df = pd.DataFrame({"a": [1], "b": exp}, index=pd.Int64Index([1]))
tm.assert_equal(df.dropna(), expected_df)