What are unit testing and integration testing?

Question

Accepted Answer

Unit testing focuses on testing individual components or units of code in isolation, while integration testing focuses on testing how those units work together.

Unit testing is done on individual units or components of code to ensure they work correctly in isolation.
Integration testing is done to test how those individual units work together as a whole system.
Unit testing is typically done by developers, while integration testing is often done by QA teams.
Examples of unit testing tools include JUnit for Java and NUnit for .NET.
Examples of integration testing tools include Selenium for web applications and Postman for APIs.