Functional Testing Examples for APIs

Functional testing is used to verify that an application behaves correctly based on expected inputs and outputs. In modern systems, especially APIs, functional testing becomes challenging due to changing data and dependencies.

What This Repo Covers

• Functional testing examples for REST APIs
• Handling dynamic test data
• Testing edge cases in real systems
• Challenges in microservices testing

Example: API Functional Test

curl -X GET http://localhost:8080/api/users \
  -H "Authorization: Bearer <token>"

This request validates whether the API returns correct user data based on input conditions.

Why Functional Testing Breaks APIs change frequently Test data becomes outdated Dependencies affect results Learn More

If you are looking for a complete functional testing guide with real examples and best practices, check this resource: https://keploy.io/blog/community/functional-testing-an-in-depth-overview

Conclusion

Functional testing works well at small scale, but requires better strategies to scale with modern systems.