Test Generator Skill

When to use this skill

Use this skill when a user asks to write, scaffold, or add test coverage to a module or function.

Steps

1. Read the target module and identify public functions and exported classes.
2. For each function, generate test cases covering: happy path, edge cases (empty input, null, boundary values), and expected error conditions.
3. Group tests by function in a single test file named <module>.test.ts (or .spec.ts per project convention).
4. Use the project's existing test framework (Jest, Vitest, Pytest — detect from package.json or pyproject.toml).
5. Add a brief comment above each describe block explaining what scenario it covers.

Important notes

• Do not add tests for private/internal helpers unless explicitly asked.
• Mock external dependencies (HTTP, file system, databases) using the framework's standard mock library.
• Each test should have exactly one assertion or a clearly documented reason for multiple assertions.
• If a module has no public exports, explain this and do nothing.