23.7 Testing & Benchmarking

Cargo provides built-in support for testing and benchmarking. We’ll explore these in detail in the next chapter, but here’s a brief overview:

23.7.1 cargo test

cargo test

Discovers and runs tests defined in:

  • tests/ folder (integration tests)
  • Any modules in src/ annotated with #[cfg(test)] (unit tests)
  • Documentation tests in your Rust doc comments

23.7.2 cargo bench

cargo bench

Runs benchmarks, typically set up with crates like criterion (on stable Rust). We’ll discuss benchmarking in the following chapter.