Part 3. Integration testing

Have you ever been in a situation where all the unit tests pass but the application still doesn’t work? Validating software components in isolation from each other is important, but it’s equally important to check how those components work in integration with external systems. This is where integration testing comes into play.

In chapter 8, we’ll look at integration testing in general and revisit the Test Pyramid concept. You’ll learn the trade-offs inherent to integration testing and how to navigate them. Chapters 9 and 10 will then discuss more specific topics. Chapter 9 will teach you how to get the most out of your mocks. Chapter 10 is a deep dive into working with relational databases in tests.