Mock Castle

trigger

"21 vi.mock() calls, 65 lines of mock setup, 45 lines of assertions. Testing a 4-line function."

what it is

Mock scaffolding consumes more lines and cognitive load than the actual assertions. The test primarily verifies mock wiring, not product behaviour. A 4:1 mock-to-assertion ratio provides less regression confidence than its line count implies.

what it signals

instead

Extract pure functions into a separate module with no side-effect imports. Test them without mocking the universe.

refs

• wake:tests/unit/bout-engine-helpers.test.ts — 21 vi.mock()