If you’re building a NodeJS/ExpressJS Serverless Application app that connects to PostgreSQL, testing your code is essential to ensure it works as expected. While many frameworks offer the ability to mock functions and database calls, this approach may not be sufficient for complex functions that require realistic database responses. That’s where the “SuperTest” npm package comes in. In this blog post, i’ll show you how to use SuperTest to write comprehensive test cases for your NodeJS/ExpressJS app that accurately simulate real-world scenarios. With this knowledge, you can confidently validate your code and catch bugs before they become bigger problems.