code: def test_dedupes_failing_test_files(
      self, mock_exists: Any, mock_open: Any
  ) -> None:
      expected_failing_test_files = {"test_car", "test_bar", "test_far"}
      found_tests = get_previous_failures()
  
      self.assertSetEqual(expected_failing_test_files, found_tests)
  
imports: import io
  import json
  import pathlib
  import sys
  import unittest
  from typing import Any, Dict, Set
  from unittest import mock
label_desc: Use image node_id 3 for calling the TestParsePrevTests obj's underlying member method code with example usage: obj.test_dedupes_failing_test_files(mock_exists, mock_open) without return types