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EA: fillna should accept same type #32414 #43230

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EA: fillna should accept same type #32414 #43230

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c46b201
TST Providing unit test to snippet GH32414
Bhavay-2001 Aug 26, 2021
02db9f0
TST Providing unit test to snippet GH#32414
Bhavay-2001 Aug 26, 2021
b872815
Updated the test_fillna file based on GH43230
Bhavay-2001 Aug 30, 2021
49b693c
Updated with required changes
Bhavay-2001 Aug 30, 2021
edf6af7
Updated the changes
Bhavay-2001 Sep 3, 2021
12ab6aa
test_fillna.py updated
Bhavay-2001 Nov 20, 2021
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22 changes: 22 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 @@ -671,6 +671,28 @@ def test_fillna_categorical_with_new_categories(self, fill_value, expected_outpu
result = ser.fillna(fill_value)
tm.assert_series_equal(result, exp)

@pytest.mark.parametrize(
"fill_value, expected_output",
[
("B", ["A", "B", "B", "B", "C"]),
("C", ["A", "B", "C", "C", "C"])
],
)

def test_series_fill(self, fill_value, expected_output):
# GH#32414
data = ["A", "B", np.nan, np.nan, "C"]
ser = Series(Categorical(data, categories=["A", "B"]))

msg = "Element not present in categories. Cannot be filled in series."
with pytest.raises(TypeError, match=msg):
ser.fillna("D")

exp = Series(Categorical(expected_output, categories=["A", "B"]))
result = ser.fillna(fill_value)
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This does not cover the issue. We need to check with a categorical fill_value too.

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I have defined the the fill_value in the pytest parameterized section. There I have provided a fill_value . Do we need to explicitly define that categroical value here??

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Could you please ellaborate on this a little more ?? I find it difficult to understand

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You are not testing everything mentioned in the issue. @mroeschke provided a code snippet there which should be covered here

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In [22]: cat = pd.Categorical(["A", "B", None, "A"])
...: ser = pd.Series(cat).fillna("B")

In [23]: >>> filled = cat.fillna(ser)

In [24]: >>> cat.fillna(filled)
Out[24]:
['A', 'B', 'B', 'A']
Categories (2, object): ['A', 'B']

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hey @phofl, this was the code snippet as being provided by @mroeschke, I have tried to add the same thing. Soo i'm asking should I add "B" instead of that fill_value??
I saw other tests too and they did the same thing, do you want me to explicitly declare "B"

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okay @phofl , I have checked with categorical_fillna too. I will add the updated code tomorrow positively. I think with that issue will be resolved. Thanks

tm.assert_series_equal(result, exp)


def test_fillna_categorical_raises(self):
data = ["a", np.nan, "b", np.nan, np.nan]
ser = Series(Categorical(data, categories=["a", "b"]))
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