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Mutation Testing with TypeScript: How to Verify Your Tests in the Age of AI Coding Agents

This story is from 2026-10-14. It is preserved in the archive; the latest stories are on the live feed.

Your tests pass. But would they catch a bug? Imagine asking an AI coding agent to implement a feature. A few minutes later, it has generated the implementation, written unit tests, and opened a pull request. The CI pipeline is green. All tests pass. Code coverage looks good. Can you trust the chang…

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  1. 2026-10-14 22:28 · DEV Community — AI
    Mutation Testing with TypeScript: How to Verify Your Tests in the Age of AI Coding Agents

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