Lab: Create JMeter Test Plan

Goal

Create a JMeter test plan to performance test a REST API.

Learning Objectives

• Create Thread Groups with appropriate settings
• Configure HTTP Request samplers
• Add assertions for validation
• Use listeners to analyze results

Pre-requisites

• JMeter installed (5.x recommended)
• Java 8+ installed

Tasks

Task 1: Install JMeter

1. Download from https://jmeter.apache.org/download_jmeter.cgi
2. Extract to a folder
3. Run JMeter:
   • Windows: bin\jmeter.bat
   • Mac/Linux: ./bin/jmeter

Task 2: Create New Test Plan

1. File → New
2. Rename Test Plan to "API Performance Test"

Task 3: Add Thread Group

Configure:

• Number of Threads (users): 10
• Ramp-Up Period: 5 seconds
• Loop Count: 3

Task 4: Add HTTP Request Defaults

Add → Config Element → HTTP Request Defaults

• Server Name: httpbin.org
• Protocol: https

Task 5: Add HTTP Requests

Create 3 HTTP Request samplers:

Request 1: GET Request

• Name: GET /get
• Method: GET
• Path: /get

Request 2: POST Request

• Name: POST /post
• Method: POST
• Path: /post
• Body Data: {"test": "data"}
• Add Header Manager: Content-Type: application/json

Request 3: Delayed Request

• Name: GET /delay/1
• Method: GET
• Path: /delay/1

Task 6: Add Assertions

For each request, add:

• Response Assertion → Response Code = 200

Task 7: Add Listeners

Add the following listeners:

1. View Results Tree
2. Summary Report
3. Aggregate Report

Task 8: Run Test

1. Save the test plan
2. Click the green Play button
3. Observe results in listeners

Task 9: Analyze Results

Answer these questions:

1. What was the average response time?
2. What was the throughput (requests/second)?
3. Did any requests fail?
4. Which endpoint was slowest?

Deliverables

1. JMeter test plan file (.jmx)
2. Screenshot of Summary Report
3. Answers to analysis questions

Bonus Tasks

• Add a Constant Timer (500ms) between requests
• Increase threads to 50 and observe behavior
• Export results to CSV