Rust for C-Programmers

23.7 Testing & Benchmarking

Cargo provides built-in support for testing and benchmarking. We’ll cover these in more detail in the next chapter. Here’s a quick preview:

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 for stable Rust.