code: def compare(self, formatter, input, output):
      formatted_input = formatter(input)
      assert formatted_input == output
  
file_path: pandas/pandas/tests/io/formats/test_eng_formatting.py
imports: import numpy
  import pytest
  from pandas import DataFrame, reset_option, set_eng_float_format
  from pandas.io.formats.format import EngFormatter
label_desc: Use image node_id 3 for calling the TestEngFormatter obj's underlying member method code with example usage: obj.compare(formatter, input, output) without return types