5. Testing & Debugging

What you'll learn

• Why we test APIs with tools like curl, HTTPie, or Postman
• How to interpret common HTTP responses (201, 400, 404)
• Techniques for reading stack traces and inspecting MongoDB state

Version control: branch for Chapter 5

Before making changes, create a fresh branch for the testing and debugging updates:

git checkout main
git pull origin main
git checkout -b feature/testing-debugging

You will commit the extra scripts, docs, or config tweaks you create while testing, then open a PR when the chapter is done.

When you finish this overview, follow Testing to exercise the endpoints and Debugging to troubleshoot problems.