code: def get_result_filename(self, test_name):
      return "{}_{}".format(test_name, "acquisition_gradient_testfile")
  
file_path: GPyOpt/GPyOpt/testing/functional_tests/base_test_case.py
imports: import os
  import numpy
  import unittest
  from mock import patch
  from driver import run_eval, run_evaluation_in_steps
  from mocks import MockModel
label_desc: Use image node_id 2 for calling the BaseTestCase obj's underlying member method code with example usage: obj.get_result_filename(test_name) and returns: str