Testing and Debugging REST APIs in NestJS

Welcome to Chapter 7. This chapter delves into the crucial aspects of ensuring your APIs are not just functional, but also robust and error-free. Testing and debugging are indispensable stages in the development life cycle, providing a safety net against unexpected behavior and ensuring that your application behaves as intended under various circumstances. Through this chapter, you will gain practical experience and insights into the methodologies and tools that make testing and debugging in NestJS not just necessary but also manageable and efficient.

By focusing on the REST API we developed in Chapter 5, we will revisit the user management system, applying rigorous testing strategies to each component. You’ll learn how to write and execute both unit and integration tests, ensuring each part of your API is thoroughly verified. Furthermore, we’ll explore effective debugging techniques to identify and resolve issues within your...