What are the best practices for unit testing in Node.js?

What are the best practices for unit testing in Node.js?

Some best practices include writing tests for every function, using a testing framework like Mocha or Jest, and keeping tests isolated.

How do I set up Jest for my Node.js project?

To set up Jest, install it via npm with npm install --save-dev jest, then add a test script in your package.json.

What should I do if my tests are flaky?

Flaky tests can often be resolved by ensuring tests are isolated, avoiding shared state, and using proper mocking.

Can you explain the difference between unit tests and integration tests?

Unit tests focus on individual components, while integration tests check how different components work together.