Integration vs End-to-End (E2E) Testing: Understanding Their Differences and When to Use Them
In software development, testing plays a crucial role in ensuring the reliability and performance of an application before it reaches end users. With various testing approaches available, it’s important to know which method fits your needs. Two widely used testing methodologies are integration testing and end-to-end (E2E) testing. Both aim to verify that a system works correctly, but they do so from different perspectives. In this post, we'll explore the key differences between integration vs E2E testing , their pros and cons, and when each should be used. What is Integration Testing? Integration testing focuses on verifying how different modules or components of a system work together as a whole. In this phase, individual units of code—usually already tested via unit tests—are combined to test their interactions. The primary goal of integration testing is to catch any issues that arise when two or more components are combined, such as API miscommunication, data mismatches, or un...