testing

# Testing Skill Standards and workflow for writing and running tests. Every feature must be tested. **Announce at start:** "I'm using testing skill to ensure proper test coverage." ## Trigger Conditions - Writing new tests for a feature or bug fix - Adding a new feature (must include tests) - Modifying logic that has existing tests (must update them) - Before claiming work is complete - Before committing code ## Framework **Vitest 4** - configured in `vitest.config.ts`. ## Test Structure ``` tests/ ├── unit/ # Individual functions, utilities, components ├── integration/ # IPC, database, service interactions ├── regression/ # Regression test cases └── e2e/ # End-to-end tests (Playwright, playwright.config.ts) ``` ## Two Test Environments | Environment | When | File naming | | ---------------- | --------------------------------- | --------------- | | `node` (default) | Main process, utilities, services | `*.test.ts` | | `jsdom` | DOM/browser-dependent code | `*.dom.test.ts` | ## Workflow ### Step 1: Identify What to Test Before writing tests, list the **riskiest scenarios** first: - What happens when the dependency returns `undefined` / throws? - What happens at boundaries (empty list, max retries, past timestamp)? - What is most likely to break in production? ### Step 2: Write Tests Follow these quality rules: **1. Describe behavior, not code structure** ```typescript // Wrong -...