code: def test_fillna_categorical_raises(self):
      data = ["a", np.nan, "b", np.nan, np.nan]
      ser = Series(Categorical(data, categories=["a", "b"]))
      cat = ser._values
  
      msg = "Cannot setitem on a Categorical with a new category"
      with pytest.raises(TypeError, match=msg):
          ser.fillna("d")
  
      msg2 = "Length of 'value' does not match."
      with pytest.raises(ValueError, match=msg2):
          cat.fillna(Series("d"))
  
      with pytest.raises(TypeError, match=msg):
          ser.fillna({1: "d", 3: "a"})
  
      msg = '"value" parameter must be a scalar or dict, but you passed a "list"'
      with pytest.raises(TypeError, match=msg):
          ser.fillna(["a", "b"])
  
      msg = '"value" parameter must be a scalar or dict, but you passed a "tuple"'
      with pytest.raises(TypeError, match=msg):
          ser.fillna(("a", "b"))
  
      msg = (
          '"value" parameter must be a scalar, dict '
          'or Series, but you passed a "DataFrame"'
      )
      with pytest.raises(TypeError, match=msg):
          ser.fillna(DataFrame({1: ["a"], 3: ["b"]}))
  
imports: from datetime import datetime, timedelta, timezone
  import numpy
  import pytest
  import pytz
  from pandas import Categorical, DataFrame, DatetimeIndex, NaT, Period, Series, Timedelta, Timestamp, date_range, isna, timedelta_range
  import pandas._testing
  from pandas.core.arrays import period_array
label_desc: Use image node_id 25 for calling the TestSeriesFillNA obj's underlying member method code with example usage: obj.test_fillna_categorical_raises() without return types