# Test > Generate tests for a function, class, or file Use when this capability is needed. - Skill: `tomevault-io/test-12` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/test-12` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/test-12/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-12 --- # Test Generation Skill Generate tests for the code the user specifies. ## Workflow 1. **Understand the code** - Read the file/function to be tested - Identify inputs, outputs, and side effects - Look for edge cases and error conditions 2. **Find existing test patterns** - Look for existing tests in the project to match style and conventions - Use the same testing framework already in use - Follow existing naming conventions 3. **Generate comprehensive tests** - Happy path: normal expected usage - Edge cases: empty inputs, boundaries, nulls - Error cases: invalid inputs, failure scenarios - If applicable: async behavior, timeouts, concurrency 4. **Test structure** - Clear test names that describe what's being tested - Arrange-Act-Assert pattern - One assertion per test when practical - Use mocks/stubs for external dependencies 5. **Write the tests** - Place tests in the appropriate location (follow project conventions) - If no test file exists, create one following project patterns 6. **Verify tests run** - Run the tests to make sure they pass - Fix any issues ## Common Test File Locations - JavaScript/TypeScript: `__tests__/`, `*.test.ts`, `*.spec.ts` - Python: `tests/`, `test_*.py`, `*_test.py` - Go: `*_test.go` (same directory) - Rust: `#[cfg(test)]` module or `tests/` directory ## Important Notes - Ask the user which function/file to test if not specified - Match existing test patterns in the codebase --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/igrybkov) — claim your Tome and manage your conversions.