What is the difference between unit testing and integration testing in Express.js?

What is the difference between unit testing and integration testing in Express.js?

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 in an Express.js application?

Sure! For unit testing, you might test a single route handler function. For integration testing, you would test the entire request-response cycle for a route.

Which testing framework do you recommend for Express.js?

I recommend using Jest for unit testing and Supertest for integration testing, as they work well together.

How do I set up Jest for unit testing in my Express.js app?

You can set up Jest by installing it via npm, creating a configuration file, and writing your test cases in a separate directory.