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 complete user registration process that includes multiple components like the database and user interface.

When should I use unit testing over integration testing?

Use unit testing when you want to ensure that individual parts of your code work correctly. Integration testing is best when you need to verify that different parts of your application interact as expected.

Are there any tools you recommend for these types of testing?

For unit testing, popular tools include JUnit for Java and pytest for Python. For integration testing, you might consider tools like Postman for API testing or Selenium for web applications.