? Real-Time API Testing Projects

? Quick Overview

Real-time API testing projects using Postman focus on validating real backend systems through CRUD operations, authentication flows, and complete end-to-end request cycles. These projects simulate how real applications interact with APIs in production.

? Key Concepts

• REST APIs and HTTP methods
• CRUD operations (Create, Read, Update, Delete)
• Authentication & Authorization
• Environment variables
• Collections & automated flows
• Pre-request scripts & Tests

? Syntax / Theory

Postman allows sending HTTP requests using different methods like GET, POST, PUT, and DELETE. JavaScript is used inside Postman for writing tests and extracting dynamic values.

? Code Example(s)

// Postman test script to validate status code and response time
pm.test("Status code is 200", function () {
pm.response.to.have.status(200);
});

pm.test("Response time is less than 500ms", function () {
pm.expect(pm.response.responseTime).to.be.below(500);
});

// Save auth token from login response into environment variable
var jsonData = pm.response.json();
pm.environment.set("authToken", jsonData.token);

?️ Interactive Postman Simulator

? Live Output / Explanation

? Interactive Flow Example

Typical End-to-End flow in Postman:

1. User Login → Token Generated
2. Create Resource using Token
3. Fetch Resource
4. Update Resource
5. Delete Resource

? Use Cases

• Backend API validation
• QA automation testing
• Learning RESTful APIs
• CI/CD pipeline testing
• Mock server verification