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Test Case Generator (AI)

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Paste a function and get back a set of proposed unit test cases, concrete inputs, expected outputs, and whether each covers a happy path, edge case, or error case, powered by GPT-4o mini

Paste a function and GPT-4o mini reads it to propose a set of unit test cases: a short description, a concrete input, the expected output, and a category of happy path, edge case, or error case for each one. It returns structured test case data rather than runnable test code in any particular framework, so you decide how to turn each case into an actual assert in Jest, pytest, or whatever you use. This is a server-backed AI tool, not a browser-only utility, so the code you paste is sent to OpenAI's API to generate the response, and it reasons from the code text alone with no access to your real dependencies or side effects, so treat the suggested cases as a starting checklist rather than a guarantee of full coverage.

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How to use Test Case Generator (AI)

  • 1.Paste a function, or load one of the built-in examples, and optionally note its language.
  • 2.Click Generate to get back a list of proposed test cases, each tagged happy path, edge case, or error case.
  • 3.Copy an individual case's input/expected pair or the whole list, then translate it into an actual test in your framework of choice.

Frequently asked questions

Does this generate runnable test code?
No, it returns structured test case data (a description, input, and expected output for each case), not code in a specific testing framework. You write the actual assertion using whichever framework your project uses.
Does this run in my browser or on a server?
Generation calls GPT-4o mini on the server since it requires an LLM, so the code you paste is sent to OpenAI's API to generate the response.
Are the suggested test cases guaranteed to be correct or complete?
No, they're inferred from the code text alone with no access to your actual dependencies, side effects, or the rest of your codebase, so an expected output can be wrong for a case that depends on external state. Treat them as a starting checklist and verify each one against your real implementation.
How many can I generate?
The free plan includes 3 generations per month and Pro includes 25, shared with the site's other AI tools' own monthly quotas. Usage shows on your dashboard.

Use via API, SDK, or MCP

cURL# Free: a few generations/month · Pro: more per month
curl -X POST api.utilix.tech/v1/ai/testcase \
  -H "Authorization: Bearer utx_live_..." \
  -H "Content-Type: application/json" \
  -d '{"prompt": "..."}'

Free plan includes a monthly quota; Pro raises the limit. Get an API key from your dashboard · Full API docs →

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