Hello,
As a full-stack JavaScript developer, TDD is my favorite approach in building production-ready SPA/PWA/SSR/SEO-friendly web apps and REST/GraphQL APIs.
When it comes to node.js, I am familiar with TDD using supertest, jest, mocha, chai, sinon.
Fixing your issue within 1 hour is sure thing.
I would always be ready for technical interview.
Regards