Differential Testing Is the Proof Your Extraction Is Missing
This story is from 2026-08-29. It is preserved in the archive; the latest stories are on the live feed.
Most extractions break at merge, not at edit time. The build passes. The tests pass. The function still misbehaves in production. The missing layer is differential testing. Run the old function and the new function on identical recorded inputs. Use separate processes with identical starting state.…
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- 2026-08-29 09:06 · DEV Community — AI
Differential Testing Is the Proof Your Extraction Is Missing