code: def test_finite_diff():
      cmd = "{cli} sample finite_diff -p {fn} -o {test_data} -n 100".format(
          cli=salib_cli, fn=ishigami_fp, test_data=test_data
      ).split()
      result = subprocess.check_output(cmd)
      assert len(result) == 0, "Error occurred!"
  
file_path: SALib/tests/test_cli_sample.py
imports: import os
  from os.path import join
  import subprocess
label_desc: Use image node_id 5 for calling a global function with example usage: test_finite_diff() without return types