Integration testing and unit testing are both software testing techniques, but they focus on different aspects of the software development process.
Unit testing involves testing individual components or modules of the software in isolation to ensure they function correctly. Each unit, typically a function or method, is tested separately to verify that it behaves as expected. For example, if you have a function that adds two numbers, a unit test would check that the function correctly adds various pairs of numbers.
Integration testing, on the other hand, focuses on testing the interactions between different modules or components to ensure they work together as expected. It verifies that the integrated system meets the requirements and performs as expected. For instance, if you have a system where a user logs in and then views their profile, integration testing would check that the login process correctly interacts with the profile retrieval process.
In summary, unit testing checks individual components, while integration testing checks the interactions between these components. Both are crucial for ensuring the overall quality of the software.
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