What is integration testing?

Integration testing is a type of software testing where different modules or components of an application are combined and tested together. The main goal is to check whether these parts work properly when they interact with each other.

In real-world applications, even if individual modules work fine, problems can occur when they are connected, such as data mismatches or communication errors. Integration testing helps identify these issues early. It is usually done after unit testing and before system testing. Developers or testers can use approaches like top-down, bottom-up, or hybrid testing.

 Overall, integration testing ensures that the complete system works smoothly as a group, not just as separate parts.