# Testing prompts

> 5 bides on testing, each with the result it produced.

- [Review gate for a coding agent's diff before you merge it](https://promptabide.com/bides/review-gate-for-coding-agent-diff) — Anyone merging changes written by Claude Code, Codex, Cursor or Copilot agents, especially after long unattended runs.
- [Build and test a regex against your own match examples](https://promptabide.com/bides/build-regex-with-test-cases) — Anyone writing a regex for validation or extraction who wants proof it handles their real examples, not just a plausible pattern.
- [Write characterization tests for untested code before a refactor](https://promptabide.com/bides/characterization-tests-for-untested-code) — Developers inheriting untested functions who need a safety net before refactoring or fixing them.
- [Find the root cause of a bug before writing any fix](https://promptabide.com/bides/root-cause-a-bug-before-fixing-it) — Developers stuck on a bug where the obvious patch didn't work, or who want to understand the failure before shipping a fix.
- [Refactor legacy code behind a characterization test gate](https://promptabide.com/bides/refactor-with-tests-gate-for-coding-agents) — Developers asking an agent to clean up tangled code where any behavior change, even an improvement, would be a bug.

---

Canonical HTML: https://promptabide.com/topics/testing
Agent guide: https://promptabide.com/llms.txt · https://promptabide.com/agent-instructions.md
Sitemap: https://promptabide.com/sitemap.xml