What is integration testing and why is it important?

What is integration testing and why is it important?

Integration testing is a phase in software testing where individual modules are combined and tested as a group. It's important because it helps identify interface defects between integrated components.

Can you explain the different types of integration testing?

Sure! The main types include Big Bang Integration, Incremental Integration (which can be either Top-Down or Bottom-Up), and Sandwich Integration. Each has its own approach to combining and testing modules.

What tools can I use for integration testing?

There are several tools available, such as JUnit, TestNG, Postman for API testing, and Selenium for web applications. The choice depends on your specific needs.

How do I write effective integration tests?

To write effective integration tests, ensure you cover all interfaces between modules, use realistic data, and automate the tests where possible to save time.

What are some common challenges in integration testing?

Common challenges include managing dependencies between modules, ensuring test data is consistent, and dealing with timing issues in asynchronous systems.