Hi everyone,
If you’re working on complex software systems, one area that often gets overlooked is integration testing.

Many teams focus heavily on unit testing, which is important, but real issues usually appear when different components start talking to each other. This could be APIs interacting with databases, third-party services, or internal modules that behave differently once integrated. Integration testing helps uncover these issues early and ensures that individual parts work together as expected.

A solid integration testing approach usually covers:

Validating data flow between modules

Detecting communication failures between services

Catching edge cases that unit tests can’t expose

Improving overall system stability before release

I recently went through a detailed guide that explains integration testing in a very practical way, including when to use it, common challenges teams face, and examples from real-world applications. It’s especially helpful for teams building API-driven or microservice-based systems.

Curious to hear how others here handle integration testing in their workflows and what tools or strategies have worked best for you.