ReviseAlgo Logo

Testing in C++

Testing Best Practices for C++

Writing effective and maintainable C++ tests

Interview: Engineering excellence

C++ Testing Best Practices

Good C++ tests are fast, deterministic, and test behavior rather than implementation. Key principles: test public interfaces, use dependency injection, and leverage RAII for test cleanup.

Guidelines

  • Test behavior, not implementation: Don't test private methods directly
  • Use dependency injection: Pass interfaces, not concrete types
  • One assertion per concept: Each test should verify one logical thing
  • Test edge cases: Empty inputs, null pointers, boundary values
  • Use sanitizers: Run tests with AddressSanitizer and UndefinedBehaviorSanitizer