What is the difference between unit testing and integration testing?

What is the difference between unit testing and integration testing?

Unit testing focuses on testing individual components or functions in isolation, while integration testing checks how these components work together.

Can you give me examples of each type of testing?

Sure! An example of unit testing is testing a single function that calculates the sum of two numbers. Integration testing might involve testing a module that combines multiple functions to process user input and return a result.

Why is unit testing important?

Unit testing is important because it helps catch bugs early in the development process, ensures code quality, and makes future changes easier.

How do I decide when to use each type of testing?

Use unit testing when you want to verify the functionality of individual components, and integration testing when you need to ensure that those components work together as expected.