Task 04 of 6
Write Unit Tests and Edge Cases
Generate test scaffolding, edge cases, and mocks faster so coverage can keep up with the code you ship.
How to approach this
Ask for happy-path, edge-case, and failure tests separately so the output stays focused. After the first draft, tighten assertions and remove checks that depend on implementation details.
AI tools for this task
These tools are well-suited for automating or accelerating this specific task.
GitHub Copilot
GitHub's AI assistant for generating unit tests, mocks, and coverage from the editor or pull request.
OpenAI Codex
AI coding tool that can write tests, run them, inspect failures, and keep improving the suite.
Claude Code
Coding agent that can find untested paths, scaffold test files, and rerun tests until they pass.
Tutorials & articles
Curated external guides to help you get this working in practice.