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61 lines
1.5 KiB
61 lines
1.5 KiB
1 year ago
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"""
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Though Index.fillna and Series.fillna has separate impl,
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test here to confirm these works as the same
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"""
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import numpy as np
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import pytest
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from pandas import MultiIndex
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import pandas._testing as tm
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from pandas.tests.base.common import allow_na_ops
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def test_fillna(index_or_series_obj):
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# GH 11343
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obj = index_or_series_obj
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if isinstance(obj, MultiIndex):
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msg = "isna is not defined for MultiIndex"
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with pytest.raises(NotImplementedError, match=msg):
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obj.fillna(0)
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return
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# values will not be changed
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fill_value = obj.values[0] if len(obj) > 0 else 0
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result = obj.fillna(fill_value)
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tm.assert_equal(obj, result)
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# check shallow_copied
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assert obj is not result
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@pytest.mark.parametrize("null_obj", [np.nan, None])
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def test_fillna_null(null_obj, index_or_series_obj):
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# GH 11343
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obj = index_or_series_obj
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klass = type(obj)
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if not allow_na_ops(obj):
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pytest.skip(f"{klass} doesn't allow for NA operations")
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elif len(obj) < 1:
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pytest.skip("Test doesn't make sense on empty data")
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elif isinstance(obj, MultiIndex):
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pytest.skip(f"MultiIndex can't hold '{null_obj}'")
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values = obj._values
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fill_value = values[0]
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expected = values.copy()
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values[0:2] = null_obj
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expected[0:2] = fill_value
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expected = klass(expected)
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obj = klass(values)
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result = obj.fillna(fill_value)
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tm.assert_equal(result, expected)
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# check shallow_copied
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assert obj is not result
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