Shift-Left Testing
summary
A small microservice with a database and web page was built and instrumented so tests live in code: about 30 unit tests plus API and integration checks using Jest, supertest and jsdom to catch logic and regex bugs before UI deployment. Development workflows shifted to spec-by-example and ATDD/BDD with executable Cucumber scenarios, and practices like pair programming and ping‑pong moved testing earlier, reducing manual QA time while regressions run automatically.
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