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  • Book Overview & Buying JMeter Cookbook
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JMeter Cookbook

JMeter Cookbook

By : Erinle
3.6 (8)
Buy this Book
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JMeter Cookbook

JMeter Cookbook

3.6 (8)
By: Erinle
Buy this Book

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
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. JMeter Fundamentals
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1. JMeter Fundamentals
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Introduction
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Executing a test script
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Recording a script via HTTP(S) Test Script Recorder
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Recording scripts via the Chrome browser extension
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Converting HTTP web archives (HAR) to JMeter test plans
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Viewing and analyzing test results
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Feeding data into a script
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Using timers
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Managing HTTP user sessions
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Testing Single Page Applications (SPAs)
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Testing AJAX-centric applications
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2. Handling Responses
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2. Handling Responses
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Introduction
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Using Regular Expression Extractor
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Using Regular Expression Tester
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Using CSS/jQuery Extractor
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Using XPath Extractor
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Dealing with file downloads
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Handling XML responses
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Handling JSON responses
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Handling HTML responses
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Using Response Assertion
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Using Duration Assertion
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Uploading files with your scripts
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3. Building Robust Test Plans with Controllers
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3. Building Robust Test Plans with Controllers
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Introduction
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Using Transaction Controller in test plans
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Using Loop Controller in test plans
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Leveraging ForEach Controller in test plans
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Using Interleave and Random Controller in test plans
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Using Runtime Controller in test plans
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4. Testing Services
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4. Testing Services
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Introduction
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Testing REST web services
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Testing SOAP web services
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Testing FTP services
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Testing relational databases
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Testing NoSQL databases
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Testing JMS services
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5. Diving into Distributed Testing
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5. Diving into Distributed Testing
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Introduction
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Testing applications with JMeter's master-slave setup
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Testing internal applications using JMeter and Vagrant
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Testing external facing applications using JMeter, Vagrant, and AWS
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Testing external facing applications using Flood.IO
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Testing external facing applications using BlazeMeter
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6. Extending JMeter
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6. Extending JMeter
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Introduction
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Using REST Sampler
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Using Ultimate Thread Group
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Using Throughput Shaping Timer
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Using Console Status Logger
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Using Dummy Sampler
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Developing custom JMeter plugins
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Testing WebSocket-enabled applications
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7. Building, Debugging, and Analyzing the Results of Test Plans
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7. Building, Debugging, and Analyzing the Results of Test Plans
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Introduction
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Using the View Results Tree listener
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Using the Aggregate Report listener
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Debugging with Debug Sampler
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Using Constant Throughput Timer
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Using the JSR223 postprocessor
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Analyzing Response Times Over Time
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Analyzing transactions per second
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Using User Defined Variables (UDV)
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8. Beyond the Basics
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8. Beyond the Basics
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Introduction
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Continuous Integration with JMeter
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Testing with different bandwidths
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Using the HTTP Cache Manager component
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Using script languages within test plans
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Writing Test scripts through Ruby DSL
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Understanding JMeter properties
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Monitoring servers while executing tests (using VisualVM)
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Monitoring servers while executing tests (using YourKit Profiler)
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Monitoring servers while executing tests (using New Relic)
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Performance tips to scale JMeter
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A. Installing the Supporting Software Needed for this Book
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A. Installing the Supporting Software Needed for this Book
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Introduction
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Installing JMeter
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Installing Java Development Kit (JDK)
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Installing JMeter plugins
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Installing Vagrant
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Installing VirtualBox
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Installing Maven
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Installing Git
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Obtaining AWS keys for EC2
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Index
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Index

Feeding data into a script

More often than not, we will need to provide varying input datasets to our scripts to simulate realistic user interaction with an application. Most applications, for instance, need to be authenticated against to view certain restrictive areas of the application. The way to accomplish this is by supplying an input datafile to the test script. The file is normally in the form of comma-separated values (CSV).

How to do it…

This recipe shows you how to feed data into your script to handle such scenarios. Perform the following steps:

  1. Download the book code samples from http://www.packtpub.com/jmeter-cookbook/book.

    Note

    Alternatively, you can clone the sample from the GitHub repository at http://github.com/jmeter-cookbook/bundled-code.

  2. Extract the contents of the ZIP file.
  3. Launch JMeter.
  4. Open the ch1_feed_me_data.jmx script from the scripts/ch1 directory.
  5. Add CSV Data Set Config to the test plan by navigating to Test Plan | Add | Config Element | CSV Data Set Config. Let's configure it:
    1. In the Filename box, enter input.txt.
    2. Leave the rest of the entries blank.
  6. Save and run the test. The execution of the script is shown in the following screenshot:
    How to do it…

How it works…

Assuming you haven't changed the default sharing mode of the added CSV dataset configuration, with each iteration run of our test plan, a line of the input.txt file is consumed. The consumed values are then turned into JMeter variables named after the first line of our input datafile, which are user and pass in our case. The values are then used further down the execution chain to fill in the username and password to access our application. In this particular test plan, as we have more threads than the amount of input data, the input data is recycled once the end of the file is reached.

There's more…

In our example, we have just provided the name of the file to read the input feed from. If you examine the CSV dataset configuration element closely, you will notice that it has other properties that can be filled in. These include the following:

  • Variable Names: Provide the comma-separated names of the variables. As we left this blank, the first line of our input script will be treated as the variable name.
  • Delimeter: Change to this option if you want to use a different delimiter other than a comma. For instance, you can use tab spaces (\t) or the colon symbol (:) instead of commas.
  • Allow Quoted Data: Set to True, if you would like to allow quoted data. For example, 'hello' as opposed to hello.
  • Recycle on EOF: In cases where you have more threads than the input data, this attribute specifies whether to allow the input data to be recycled. In such a case, the input feed will start from the beginning of the file once the data feed has run out.
  • Stop thread on EOF: This option determines whether to kill the thread has been reached.
  • Sharing mode: The default option is All meaning all threads; even those in a different thread group get to share the same data. The other options are Current thread group and Current thread, which specify that only the threads within a particular thread group and only a particular thread can retrieve data from the file, respectively.
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