# Test Gen > Generate comprehensive tests using Vitest with edge cases Use when this capability is needed. - Skill: `tomevault-io/test-gen` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/test-gen` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/test-gen/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/test-gen --- # Test Generation Use this skill to generate tests that meet SISU's coverage standards. ## Goals - Cover happy path, edge cases, and invalid inputs - Use Vitest syntax and patterns - Keep tests deterministic and isolated ## Steps 1. Identify target module and public behavior 2. Enumerate input variations 3. Generate tests for error handling and cancellation 4. Validate coverage thresholds (≥ 80%) ## Resources See `resources/vitest-patterns.md` for patterns and examples. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/finger-gun) — claim your Tome and manage your conversions.