Learn how to load test a Json Rest API using JMeter by handling authentication headers, extracting variables from Json responses and applying Json assertions. Includes a sample JMX project.
I’m sure you’re here because you need to load test a Json Rest API. It’s not a surprise since Rest API are increasingly popular these days.
That’s the purpose of this guide: help you load test a Json Rest API through a concrete example, OctoPerf’s Json Rest API.
And this guide will completely get you through the following knowledge:
Handle Rest API Login using an Http POST Request, Extract Variables from a Json Response and reuse it later in the script, And verify Json responses using JMeter Json Assertion (introduced in JMeter 4).
10+ JMeter Assertions fully reviewed. Learn how to use assertions like XPath, JSON, JSR223, Beanshell, Size and Duration through real-world examples illustrated with many screenshots.
Wether you want to:
Check if the server response contains a specific string, Or Verify the server returned an HTTP 200 OK, Or check the value of a json field (using JsonPath like $.store..price). Assertions are the way to go.
The problem is: you don’t know how to get started. And the number of available assertions is overhelming. No worries!
This ultimate guide on JMeter Assertion explores every single assertion type through comprehensive examples.
Need help to get JMeter working on Windows? This guide learns you how to install JMeter on your PC running Windows 7, 8 or 10. in just a few minutes.
JMeter isn’t particularly hard to install. But that’s easy to say when you’ve done it many times.
Bsically if you want to get started with JMeter on Windows. That’s great because this guide is for you! Let’s see how to install JMeter on Windows.
Install Java Check Java Version JMeter is a Java program: the Java Virtual Machine must be installed prior to installing JMeter.
To check if Java is installed properly:
Learn how to use JMeter CSS JQuery Extractor to work with HTML responses. a lot of real-world examples with detailed JMeter screenshots and explanations.
I guess if you are here, chances are you have already visited our JMeter series on variable extraction:
XPath Extractor: extract content from XML responses using XPath Expressions, Regexp Extractor: extract content using Regular Expressions, and Json Path Extractor: extractor content using JsonPath. There is another way to extract content from a server response: Using CSS Selectors or JQuery Selectors.
Let’s see how we can leverage selectors to extract variables with JMeter!
Learn by examples how to use JMeter XPath Path Extractor to work with XML and HTML server responses. Master XPath Expressions through real-life examples and detailed screenshots.
If you’re here, it’s probably because you need to extract variables from an XML (like SOAP) response using JMeter. Best of all, it works with HTML Too.
If you’re new to JMeter, read our JMeter Tutorial to get started quickly. Besides, we have an excellent guide on JMeter’s Json Extractor too.
Good news! You’re on the definitive guide to master JMeter XPath Extractor using XPath Expressions. Let’s go!
XPath Expressions XPath Syntax XPath expressions are a language to select nodes within an XML document.
Need help to setup JMeter Plugins? No worries! Learn how to install JMeter Plugins Manager with detailed screenshots and explanations.
Struggling with JMeter Plugins setup? Need some help? Good news: you’re in good hands.
Let’s guide you through the steps to install and manage JMeter Plugins on top of your JMeter. If you don’t have JMeter already, please Download and Install JMeter first.
This tutorial fully covers the following points:
Download and install JMeter Plugins Manager, Install, Upgrade and Remove JMeter Plugins through JMeter UI, and Which JMeter Plugins you should use.
New to JMeter? This tutorial is for you. It covers everything you need to know: dynamic parameters handling, scripting realistic scenarios and debugging thread groups.
You are probably looking for a tutorial to quickly learn how to use JMeter.
You have already read many other JMeter Tutorials, but the only thing which comes to your mind is… Boring.
That’s great because this Huge Tutorial will teach you in a way you don’t fall asleep:
What JMeter Is: Learn what a Load Testing Tool is, How It Works: get introduced to the concepts behind the tool and know the JMeter features, How to Setup the Tool: learn how to install and run JMeter, How to Build a Test Plan: JMeter Test Plan is the root for all tests, learn how to create your own, How to Run Your First Test: We’re going to unleash JMeter’s power, How to design dynamically behaving users by extracting content from server responses, Finally, How to Collect and Analyze Results: gathering response times and analyzing the target website performance.
From configuration to file splitting, learn how to change the data every thread is using, with this in-depth CSV Dataset tutorial.
You’re probably asking several legitimate questions:
How can I simulate concurrent users with unique logins using JMeter ? How can I split JMeter CSV Data Set over multiple load generators in case of Remote Testing? Is there a solution to Randomize the content of the CSV before a test run? Let me tell you a secret: you’ll get all the answers below.
You will learn how to swarm your system with dynamically behaving users thanks to JMeter CSV Data Set Config.
Find out the purpose of JMeter response assertions. From configuration to best practices, learn how to make the most out of them.
When running a protocol based load test with JMeter, it is always a challenge to make sure the server responses are correct. The default validation is only done on HTTP response codes based on their value:
OK < 400 <= KO And since 4XX and 5XX HTTP response codes are error messages it makes sense. But it’s easy to understand why this is not enough.
What to expect with no assertions Take any web application with a login, when you enter invalid credentials you might get something like this:
You need to create a different thread with unique session for each user? Learn how to use different logins per user with a CSV file.
Problem You want to simulate a realistic load test where every user is having a unique user session. You application may only accept one user login per account at a time. You want each concurrent user to pick a different login password.
It’s way more realistic to simulate concurrent users using unique logins and passwords because it’s closer to the real world load. It’s a good practice to avoid using a single user login and password for all concurrent users.