What is Integration Testing?

Integration testing is a software testing technique in which individual units or components of a software application are combined and tested as a group. The goal of integration testing is to verify that different components of the system work together as expected and that they meet the requirements of the system. Integration testing is typically done after unit testing and before system testing. It is done to catch any integration issues or bugs that may arise when different components are combined. This can include issues such as data inconsistencies, communication errors, or unexpected interactions between components. 

 There are different types of integration testing, such as:

 Top-down integration testing: This approach starts with testing the top-level modules and then working downwards through the lower-level modules. Bottom-up integration testing: This approach starts with testing the lowest-level modules and then working upwards through the higher-level modules. Big-bang integration testing: This approach tests all the components of the system at once. Incremental integration testing: This approach tests the components in small groups, incrementally adding more components until the entire system is integrated. Integration testing is an important step in the software development process as it helps to ensure that the different components of the system work together seamlessly and the overall system is stable.