Been trying to improve our integration testing setup lately, and honestly it’s way harder than it sounds.
Unit tests are easy to maintain, but the moment you start testing how services talk to each other (APIs, DBs, queues), things get messy real quick. Flaky tests, environment issues, mocks not behaving like real systems… you name it.
One thing I realized is that integration testing isn’t just “connect two modules and test.” It’s more about verifying how data flows and how components behave together under real conditions.
Came across a pretty detailed guide recently while researching:
https://keploy.io/blog/community/integration-testing-a-comprehensive-guide
It explained different approaches (top-down, bottom-up, etc.) and when to actually mock vs use real services, which I found useful.
Curious how others handle this: