While testing an SAP Fiori app you discover that the navigation on the page does...

OPA5 (One Page Acceptance)testing framework is used for:

End-to-end integration testingof SAPUI5 apps.

Verifyingnavigation, routing, and view transitionsusing test cases written in Given-When-Then format.

SAPUI5 Testing Guide:

“OPA tests simulate full user interactions, including navigation, and validate that applications behave as expected.”

QUnit is for unit tests. Sinon is a mocking library. Mock server simulates backend but doesn’t test navigation logic.