A document describing what the API accepts and a validator enforcing it are two implementations of one rule, and they diverge in the direction of the code. Validating…
February brought the removals that 8 had warned about for a year, and a suite that ignored the warnings does not run at all. Rector handles the mechanical…
A test that fails one run in twenty trains the team to re-run the pipeline, and once that habit exists a real failure is re-run too. Quarantining without…
Some mutations produce code that behaves identically to the original, so no test can possibly kill them — and they are indistinguishable from real findings without reading each…
Example-based tests check the cases somebody thought of, and the bugs are in the cases nobody thought of — which is a machine’s job. Finding the property is…