rust-unit-tests

---

name: rust-unit-tests description: Scans a Rust project to identify functions/methods missing unit tests, then generates them. Usage: /rust-unit-tests [path] — path is optional, defaults to the current working directory. argument-hint: [path/optional] allowed-tools: Glob Grep Read Edit Write Bash TodoWrite

Rust Unit Test Generation

Live project scan

bash "${CLAUDE_SKILL_DIR}/scripts/find-untested.sh" "$ARGUMENTS"

---

Your task

Using the scan output above, generate unit tests for all untested functions in this Rust project.

Supporting files — read these before writing any tests

• Test block format and naming rules → template.md
• Example: pure function → examples/pure-function.md
• Example: Result<T, E> → examples/result-type.md
• Example: struct methods → examples/struct-methods.md
• Expected report format → examples/report.md

Process

1. Read template.md and the relevant examples for the function types present in this project.
2. Prioritize functions in this order:
   • Public functions with no test module in their file
   • Public functions whose file has a test module but no test covering them
   • Complex private functions
3. Skip without comment: main(), trivial getters/setters, derived trait impls (Default, Clone, etc.), framework init functions.
4. Skip with TODO: functions that require external I/O, a database, or network — add // TODO: mock <Trait> to test <fn> in the source file.
5. Write tests directly into each source file following template.md.
   • If #[cfg(test)] mod tests already exists → add inside it.
   • If not → append the full block at the end of the file.
6. After all edits, run the tests:

bash "${CLAUDE_SKILL_DIR}/scripts/run-tests.sh" "$ARGUMENTS"

7. Fix any compilation errors in the generated tests.
8. Output the final report following the format in examples/report.md.