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JMeter Cookbook

JMeter Cookbook

By : Erinle
3.6 (8)
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JMeter Cookbook

JMeter Cookbook

3.6 (8)
By: Erinle

Overview of this book

This book is great for you if you are a developer, quality assurance engineer, tester, or test manager who is looking to get a firmer grasp of elementary, deep, and advanced testing concepts using Apache JMeter. It’s assumed you have access to a computer and an Internet connection. No prior testing or programming experience is required, but would be helpful.
Table of Contents (11 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. JMeter Fundamentals
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1. JMeter Fundamentals
Introduction
Executing a test script
Recording a script via HTTP(S) Test Script Recorder
Recording scripts via the Chrome browser extension
Converting HTTP web archives (HAR) to JMeter test plans
Viewing and analyzing test results
Feeding data into a script
Using timers
Managing HTTP user sessions
Testing Single Page Applications (SPAs)
Testing AJAX-centric applications
2
2. Handling Responses
2. Handling Responses
Introduction
Using Regular Expression Extractor
Using Regular Expression Tester
Using CSS/jQuery Extractor
Using XPath Extractor
Dealing with file downloads
Handling XML responses
Handling JSON responses
Handling HTML responses
Using Response Assertion
Using Duration Assertion
Uploading files with your scripts
3
3. Building Robust Test Plans with Controllers
3. Building Robust Test Plans with Controllers
Introduction
Using Transaction Controller in test plans
Using Loop Controller in test plans
Leveraging ForEach Controller in test plans
Using Interleave and Random Controller in test plans
Using Runtime Controller in test plans
4
4. Testing Services
4. Testing Services
Introduction
Testing REST web services
Testing SOAP web services
Testing FTP services
Testing relational databases
Testing NoSQL databases
Testing JMS services
5
5. Diving into Distributed Testing
5. Diving into Distributed Testing
Introduction
Testing applications with JMeter's master-slave setup
Testing internal applications using JMeter and Vagrant
Testing external facing applications using JMeter, Vagrant, and AWS
Testing external facing applications using Flood.IO
Testing external facing applications using BlazeMeter
6
6. Extending JMeter
6. Extending JMeter
Introduction
Using REST Sampler
Using Ultimate Thread Group
Using Throughput Shaping Timer
Using Console Status Logger
Using Dummy Sampler
Developing custom JMeter plugins
Testing WebSocket-enabled applications
7
7. Building, Debugging, and Analyzing the Results of Test Plans
7. Building, Debugging, and Analyzing the Results of Test Plans
Introduction
Using the View Results Tree listener
Using the Aggregate Report listener
Debugging with Debug Sampler
Using Constant Throughput Timer
Using the JSR223 postprocessor
Analyzing Response Times Over Time
Analyzing transactions per second
Using User Defined Variables (UDV)
8
8. Beyond the Basics
8. Beyond the Basics
Introduction
Continuous Integration with JMeter
Testing with different bandwidths
Using the HTTP Cache Manager component
Using script languages within test plans
Writing Test scripts through Ruby DSL
Understanding JMeter properties
Monitoring servers while executing tests (using VisualVM)
Monitoring servers while executing tests (using YourKit Profiler)
Monitoring servers while executing tests (using New Relic)
Performance tips to scale JMeter
9
A. Installing the Supporting Software Needed for this Book
A. Installing the Supporting Software Needed for this Book
Introduction
Installing JMeter
Installing Java Development Kit (JDK)
Installing JMeter plugins
Installing Vagrant
Installing VirtualBox
Installing Maven
Installing Git
Obtaining AWS keys for EC2
10
Index
Index

Recording scripts via the Chrome browser extension

Recording test scripts is one you will be doing quite often. There are many alternatives to how we can record test scripts in JMeter.

How to do it…

In this recipe, we show you how to record test scripts with just a browser add-on installed on the Google Chrome browser. Perform the following steps:

  1. Install the Google Chrome browser if it's not already installed on your machine.

    Note

    You can download it from https://www.google.com/intl/en/chrome/browser/.

  2. Open the Chrome Web Store.
  3. Search for blazemeter on the web store.
  4. Install the BlazeMeter browser extension by clicking on the Free button.

    Note

    Once installed, a new BlazeMeter icon will be placed in the top-right corner of your browser toolbar.

  5. Click on the newly added BlazeMeter extension button in the top-right corner of your browser toolbar.
  6. Press the Record button.
  7. Point your browser to a website of your choice.
  8. Navigate through the website as you will normally do as a user.
  9. After the previous step, stop the recording and click on the export to jmx button (.jmx). This will download a copy of your script to your local machine.
  10. Open the exported test script in JMeter.
  11. Add View Results in Tree Listener to the test plan (Test plan | Add | Listener | View Results in Tree Listener).
  12. Run the exported test script with JMeter.
  13. View the results.

    Tip

    Exporting your recorded test plan requires a free account with BlazeMeter for you to be logged in.

    How to do it…

    Installing the BlazeMeter Chrome extension

The BlazeMeter Chrome extension should look similar to what is shown in the preceding screenshot. Using this extension, additional properties can be configured in the Advance section of the extension. The following is a screenshot of the extension:

How to do it…

Using the BlazeMeter Chrome extension

How it works…

The browser extension captures the user interaction with the website in the JSON format as long as the recorder is on.

When the recording is stopped, no further user actions are captured. After the export button has been clicked on the JSON format is then converted to the XML format, which JMeter understands and can work with. The downloaded recorded script can then be edited and run within JMeter like any other script.

There's more…

The extension allows you to selectively capture requests by providing you with the ability to pause recording in between the user interactions. It also allows you to filter out unwanted traffic you might not be interested in capturing in your test scripts through the include filter pattern text area.

Furthermore, the Advance menu option allows you to gain more control over which requests are captured in your script, allowing you to capture only the top-level requests (default), disable browser cache (default), disable recording cookies (default), and edit the setting before proceeding to run.

Finally, as BlazeMeter (one of the many providers offering distributed testing in the Cloud) provides this extension, it offers additional features including the following:

  • Allows you to run your scripts directly in the Cloud (see Chapter 5, Diving into Distributed Testing)
  • Allows you to simulate thousands of users with ease (see Chapter 5, Diving into Distributed Testing)
End of Section 5
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