// Appends the given TestPartResult to the array.
  void Append(const TestPartResult& result);

  // Returns the TestPartResult at the given index (0-based).
  const TestPartResult& GetTestPartResult(int index) const;

  // Returns the number of TestPartResult objects in the array.
  int size() const;

 private:
  std::vector<TestPartResult> array_;

  // Appends the given TestPartResult to the array.
  void Append(const TestPartResult& result);

  // Returns the TestPartResult at the given index (0-based).
  const TestPartResult& GetTestPartResult(int index) const;

  // Returns the number of TestPartResult objects in the array.
  int size() const;

 private:
  std::vector<TestPartResult> array_;

  // Returns the i-th test part result among all the results. i can range
  // from 0 to test_property_count() - 1. If i is not in that range, aborts
  // the program.
  const TestPartResult& GetTestPartResult(int i) const;

  // Returns the i-th test property. i can range from 0 to
  // test_property_count() - 1. If i is not in that range, aborts the
  // program.
  const TestProperty& GetTestProperty(int i) const;

  // Returns the i-th test part result among all the results. i can range
  // from 0 to test_property_count() - 1. If i is not in that range, aborts
  // the program.
  const TestPartResult& GetTestPartResult(int i) const;

  // Returns the i-th test property. i can range from 0 to
  // test_property_count() - 1. If i is not in that range, aborts the
  // program.
  const TestProperty& GetTestProperty(int i) const;