Mutation Testing Assistant

Test your tests. Generate mutants to evaluate if your test suite truly catches bugs.

Source Code to Mutate

Mutation Report

Paste code to generate mutants and test your tests.

How Mutation Testing Works

  1. Paste Code: Input the source code you want to test.
  2. Mutate: The AI introduces small changes ("mutants") like flipping operators or removing logic.
  3. Evaluate: Review where the mutants were created.
  4. Improve: If your current tests wouldn't fail for these mutants, add new tests to kill them.

Better Coverage

Code coverage only tells you what executed. Mutation testing tells you if your tests actually assert the correct behavior.

Find Hidden Bugs

Discover logic paths that are "tested" but not actually verified, preventing regression bugs.

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