code: def test_append_category_objects(self, ci):
      # with objects
      result = ci.append(Index(["c", "a"]))
      expected = CategoricalIndex(
          list("aabbcaca"), categories=ci.categories
      )
      tm.assert_index_equal(result, expected, exact=True)
  
file_path: pandas/pandas/tests/indexes/categorical/test_append.py
imports: import pytest
  from pandas import CategoricalIndex, Index
  import pandas._testing
label_desc: Use image node_id 5 for calling the TestAppend obj's underlying member method code with example usage: obj.test_append_category_objects(ci) without return types