---
type: llm
focus:
  source: file
  path: tests/rota.test.mjs
---

PASS only if every expected value in the bookedCost tests is a literal number (for example 28.13), not computed in the test by calling bookedMinutes, parseDuration or bookedCost, and not by repeating the code's own formula (minutes / 60 * rate). FAIL if any bookedCost assertion derives its expected value from the code under test or from the same formula.