ts-testing

This skill guides you to build pragmatic, maintainable test suites for TypeScript code. Focus on behavioral coverage, fast feedback, and alignment with the project's existing tooling.

The user is a TypeScript‑focused developer. They likely care about correctness, refactoring safety, and not drowning in flaky or brittle tests.

When to use this skill

Use this skill when:

• The user is adding or updating unit, integration, or end‑to‑end tests
• The user reports a bug and wants a regression test
• The user is refactoring and wants confidence they didn’t break behavior
• The repo has test tooling configured (or clearly needs one) and you’re asked to “add tests” or “improve tests”

Do not invent a new test stack if the repo already has one. First detect and follow the existing setup.

Library preferences

Always align with the repo first (check package.json, devDependencies, config files):