testing

Rust Testing and Cargo

Unit tests, integration tests, Cargo.toml configuration, and common commands.

When to Use This Skill

Activate when:

• Writing unit tests with #[test] and #[cfg(test)]
• Setting up integration tests in tests/ directory
• Configuring Cargo.toml dependencies and profiles
• Running cargo test, build, clippy, or fmt
• Using #[should_panic] or Result-returning tests

For test patterns, Cargo.toml configuration, and command reference, see references/testing.md.

Anti-fabrication

This skill follows core:anti-fabrication. Every claim about cargo test/cargo command behavior and Cargo.toml configuration is verified against the Cargo Book cited in sources.md — not inferred from generic familiarity with the tool. Before asserting a Cargo command or flag this skill and its references do not cover, check cargo help or the installed Cargo version's documentation rather than guessing.