Postman Mini-Project | Automating API Test Flow with Postman Collections & Runner

00:00 - Intro 00:25 - Scenario overview 01:30 - Project Deliverables 02:22 - Create new environment and variables 04:57 - Create new Collection 06:14 - Create Login request 09:42 - Extract and store token 15:15 - Refer token in next request 18:12 - Extract and store userid 21:15 - Refer userid in next request 29:00 - Run Collection 31:46 - Tips / Common mistakes TAKE THE QUIZ and let me know your Score - https://forms.gle/XJzL2fmNnL2cgNzd7 In this hands-on Postman tutorial, you’ll learn how to: ✅ Extract values from API responses and store them in variables ✅ Use variables dynamically across multiple API requests ✅ Automate complete API test flows using Postman Collection Runner ✅ Validate responses with assertions and environment variables ✅ Run your entire test suite with a single click 🎯 Ideal for: QA Engineers Automation Testers SDET Aspirants Students learning API Testing This practical mini project is perfect for beginners and QA professionals who want to understand real-world API automation using Postman. Scenario Overview: You have a simple User Management API The test flow involves: Login → extract token Create a user → use token → extract user ID Update user using the extracted ID Delete the user You’ll run all these steps as one automated flow using Postman Runner Deliverables: ✅ Postman Collection with at least 4 requests ✅ Environment file for base URL and dynamic variables ✅ Automated run report (via Collection Runner) End Result: you can run a complete API workflow in one go you can pass variables dynamically and chain requests Builds a foundation for data-driven and CI/CD testing Step 1 - Create new Environment Step 2 - Add a variable: baseUrl → https://reqres.in token → (empty) userId → (empty) Step 3 - Save and select the environment Step 4 - Click “New” → Collection → Name it User Flow Automation Step 5 - Create a new Post request Login (Extract Token) {{baseUrl}}/api/login Step 6 - Add body { "email": "[email protected]", "password": "cityslicka" } Step 7 - In Tests tab add: const response = pm.response.json(); pm.environment.set("token", response.token); pm.test("Token is received", () =＞ { pm.expect(response.token).to.not.be.undefined; }); Step 8 - Create Request 2 — Create User POST {{baseUrl}}/api/users Step 9 - Add body: { "name": "John Doe", "job": "QA Engineer" } Step 10 - Headers: Authorization: Bearer {{token}} Step 11 - Tests tab: const response = pm.response.json(); pm.environment.set("userId", response.id); pm.test("User ID is stored", () =＞ { pm.expect(response.id).to.not.be.undefined; }); Step 12 - Request 3 — Update User UPDATE {{baseUrl}}/api/users/{{userId}} Step 13 - Add body and headers as needed Step 14 - Tests tab: pm.test("User retrieved successfully", () =＞ { pm.response.to.have.status(200); }); Step 15 - Request 4 — Delete User DELETE {{baseUrl}}/api/users/{{userId}} Step 16 - Headers: Authorization: Bearer {{token}} Step 17 - Tests tab: pm.test("User deleted", () =＞ { pm.response.to.have.status(204); }); Step 18 - Add a Pre-request Script in “Login” to print timestamp: (Optional) pm.environment.set("runStartTime", new Date().toISOString()); console.log("Run started at:", pm.environment.get("runStartTime")); Step 19 - Open Collection Runner Use Collection: User Flow Automation Environment: (your environment) Step 20 - Run the Collection and observe Token gets stored User created User fetched User deleted All tests run automatically ✅ Expected Output: All 4 requests executed in sequence Tests show “Passed” Token and userId handled dynamically Tips / Common Mistakes: ✅ Make sure environment is selected before running 🚫 Don’t hardcode token or user ID 🧪 Use console and Test Results panel to debug 💾 Save requests before running the Collection 🧭 Order matters in the Runner — login must run before create user #PostmanTutorial #APITesting #AutomationTesting ▬▬▬▬▬▬▬ Share with all who may need this If my work has helped you, consider helping any animal near you, in any way you can Never Stop Learning Raghav Pal ▬▬▬▬ USEFUL LINKS ▬▬▬▬ ✅ ALL TUTORIALS - https://AutomationStepByStep.com/ 🙌 Connect with Raghav: Ask Raghav: https://bit.ly/2CoJGWf GitHub: https://github.com/Raghav-Pal Udemy: https://www.udemy.com/user/raghav-pal-3/ Shorts Eng - https://bit.ly/3H9bifV Shorts Hindi - https://bit.ly/3XY7XqN ➡️ Subscribe for more videos:    / @raghavpal   —