API Fundamentals
/Intermediate
Automated API Testing
Definition
Writing scripts that programmatically send hundreds of HTTP requests to an API and assert that the responses match expected values, running automatically in CI/CD pipelines.
Explain Like I'm New
Instead of clicking 'Send' in Postman 50 times every morning, you write a script. The script boots up the server, hits all 50 endpoints in 2 seconds, and prints a green checkmark if they all work. If you break the code, the script instantly fails and yells at you.
Real World Example
Using Jest and Supertest in a Node.js project to write a test suite that automatically registers a user, logs them in, extracts the JWT, and verifies they can access a protected route.
Common Use Cases
- •Regression testing
- •CI/CD pipelines
- •TDD
Interactive Example
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Interview Questions
basic
- What is a 'Regression' in software development?
intermediate
- Why do automated API tests usually use a separate 'Test Database' instead of the development database?