code: def test_parse_important_cc_diff(self):
      hunks = diff_parser.parse_hunks(self.important_cc_diff)
      self.assertLen(hunks, 1)
      [hunk] = hunks
      self.assertEqual(hunk.file, "src/important.cc")
      self.assertEqual(hunk.start, 1)
      self.assertEqual(hunk.length, 3)
  
      expected_lines = [
          "+// Here we care if we find prohibited regexes.",
          "+std::unique_ptr<int> add(int a, int b) {",
          "+  return std::make_unique<int>(a + b);",
          "+}",
      ]
  
      self.assertEqual(hunk.lines, expected_lines)
  
file_path: tensorflow-upstream/third_party/xla/build_tools/lint/diff_parser_test.py
imports: from absl.testing import absltest
  from xla.build_tools.lint import diff_parser
label_desc: Use image node_id 2 for calling the ParseDiffTest obj's underlying member method code with example usage: obj.test_parse_important_cc_diff() without return types