Rust

Test Commands

Run unit tests, integration tests, doc tests, and benchmarks with Cargo. Rust's built-in test framework requires no additional dependencies for comprehensive testing.

8 commands

Pro Tips

Run a specific test: 'cargo test test_name' filters by name. Use 'cargo test -- --nocapture' to see println! output.

Use 'cargo test --doc' to run documentation examples as tests — keeps your docs accurate.

Use '#[ignore]' attribute and 'cargo test -- --ignored' for slow integration tests you don't want in every run.

Common Mistakes

Tests run in parallel by default. Use '--test-threads=1' if tests share resources like databases or files.

Doc tests compile each example as a separate binary — they're slower than unit tests. Keep them focused.

Commands

Run all tests

$ cargo test

Run all tests in project.

Run specific test

$ cargo test test_name

Run tests matching pattern.

Run with output

$ cargo test -- --nocapture

Run tests showing println! output.

Run library tests

$ cargo test --lib

Run only library unit tests.

Run doc tests

$ cargo test --doc

Run documentation tests.

Run ignored tests

$ cargo test -- --ignored

Run tests marked with #[ignore].

Run benchmarks

$ cargo bench

Run all benchmarks.

Use nextest

$ cargo nextest run

Run tests with cargo-nextest (faster, better output).