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The Test That Survives Its Own Implementation

This story is from 2026-10-12. It is preserved in the archive; the latest stories are on the live feed.

You ask your agent to cover a new function. It comes back with eight tests, all green. You move on. Sometime later you're staring at the diff and a nagging question surfaces: what would actually break if this function returned the wrong thing? The answer, more often than you'd like, is nothing. The…

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  1. 2026-10-12 16:26 · DEV Community — AI
    The Test That Survives Its Own Implementation

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