What is the aim of integration testing?

Integration testing primarily aims to evaluate how different system components interact with one another. After individual modules have been tested in isolation during unit testing, integration testing brings these modules together to see if they function correctly as a group. This phase of testing is critical because it identifies any potential issues that arise not within the individual modules themselves, but in the way they communicate, share data, and work together as a cohesive unit.

This type of testing helps ensure that the combined parts of the software behave as expected in scenarios that mimic real-world usage. It involves testing interfaces and flow of data between the modules, which is essential for validating the interactions and dependencies that can impact the overall functionality of the application. Successfully passing integration tests indicates that the components have been integrated properly and the complete software system can operate predictably and effectively.