Automated Testing That Works: Unit, Integration, and Endto-End

Confident Code Starts with Tests That Deliver

Tired of brittle tests? Tired of bugs slipping through? Automated Testing That Works teaches you how to build a rock-solid test suite that’s easy to maintain, catches real problems, and empowers continuous delivery.

Whether you're a junior developer or a seasoned engineer, this practical guide walks you through the entire automated testing stack—from unit tests to integration to full end-to-end coverage—so you can build software that ships with confidence.

You won’t just write tests. You’ll learn how to test smart.

What You’ll Learn:

• Core principles of automated testing (fast, reliable, isolated)

• Writing unit tests that catch logic errors early

• Creating integration tests that simulate real-world scenarios

• End-to-end tests that validate the full user journey

• Mocking, stubbing, and controlling side effects

• Testing asynchronous flows, APIs, and databases

• When (and when not) to test

• Choosing the right tools: Jest, Mocha, JUnit, Cypress, Selenium, etc.

• Designing a scalable test architecture for real-world teams

• Integrating tests into CI/CD pipelines

From frontend to backend, from local dev to production—you’ll gain the skills to test every layer of your stack without wasting time on fragile or flaky code.

Write less. Catch more. Ship faster.