Test ideas from code
AIPaste a function signature, interface, or short implementation. You'll get ideas for happy paths, edge cases, and failures—useful for planning tests, not a substitute for running them.
Code or signature
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Common use cases
- Before writing tests: collect edge cases for a pure function or parser.
- Review a PR: ask what scenarios might be missing from a new API.
- Pair with the regex tools when the snippet involves pattern-heavy behavior.
Common mistakes to avoid
Treating suggestions as exhaustive or as coverage metrics
Output is a brainstorming aid. You still design assertions and run your test suite locally.
Pasting proprietary code you cannot share
Prefer minimal examples or pseudocode. Assume server-side processing when AI is enabled.
FAQ
Does this run my code?
No. It only reads the text you paste and suggests scenarios.
Which languages?
Any—signatures and short snippets in common languages work best; very large files may be truncated by limits.
More tools
Related utilities you can open in another tab—mostly client-side.
Natural language → regex
AIDescribe a match in English; get a suggested JS RegExp, flags, and notes—pair with the Regex tester.
Regex generator & tester
ClientPresets (US/NANP & E.164 phones, email, URL), JS snippet, local test.
SQL query explainer
AIPaste SQL text; get joins, filters, and aggregates explained—nothing is executed; pair with the SQL formatter.
Regex pattern explainer
AIPaste a regex; get groups, quantifiers, and flags in plain English—pair with the Regex tester.