code: def test_round_interval_category_columns(self):
      # GH#30063
      columns = pd.CategoricalIndex(pd.interval_range(0, 2))
      df = DataFrame([[0.66, 1.1], [0.3, 0.25]], columns=columns)
  
      result = df.round()
      expected = DataFrame([[1.0, 1.0], [0.0, 0.0]], columns=columns)
      tm.assert_frame_equal(result, expected)
  
file_path: pandas/pandas/tests/frame/methods/test_round.py
imports: import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Series, date_range
  import pandas._testing
label_desc: Use image node_id 8 for calling the TestDataFrameRound obj's underlying member method code with example usage: obj.test_round_interval_category_columns() without return types