General Principles
This may be the most obvious piece of advice in the book:
| Prescription 40 | When a formerly passing test fails, something has changed. |
Obvious or not, itâs worth repeating, mantralike, when confronted with a bad bug. When a formerly passing test fails, it means something changed.
It may be in the code, the system, or the test. But itâs probably not sunspots, and itâs probably not evil spirits possessing your MacBook (unless youâre living in one of Charles Strossâs Laundry novels).
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