rust-unit-tests

Organize Rust unit tests by placing them in dedicated files named filename_tests.rs or mod_tests.rs, then explicitly include the test module at the end of the corresponding source file.

Run Rust unit tests by executing cargo test in your project directory. This command automatically discovers and runs all functions within #[cfg(test)] modules across the codebase.

Best practices for structuring Rust test suites involve creating small, focused test modules, minimizing global state, and applying clear naming conventions to ensure correctness and maintainability.

Put the #[cfg(test)] module at the end of your Rust source file. This explicit inclusion pattern keeps primary logic clean while enabling targeted unit testing for that specific file.

Yes, this approach works for crate-level tests across large Rust codebases. It emphasizes small, focused test modules and explicit inclusion patterns to maintain correctness and maintainability at scale.