def test_fillna_categorical(self): # GH 11343 idx = CategoricalIndex([1.0, np.nan, 3.0, 1.0], name='x') # fill by value in categories exp = CategoricalIndex([1.0, 1.0, 3.0, 1.0], name='x') self.assert_index_equal(idx.fillna(1.0), exp) # fill by value not in categories raises ValueError with tm.assertRaisesRegexp(ValueError, 'fill value must be in categories'): idx.fillna(2.0)