Software Testing has undergone a massive evolution in the last decade. The growth has also created an increased need for various testing tools for QA testing to ensure the final product matches the expectation. jMeter is one such tool. It is Open-Source testing software that is a 100% pure Java application for the load as well as performance testing. Enroll in a QA software testing training program to become a certified tester within a short span. You will find answers to all your queries in this tutorial.
It is specifically designed to enclose different categories of tests like load, functional, performance, regression, etc., and needs JDK 5 or higher. Today's tutorial provides in-depth coverage of the jMeter framework, including system requirements, Installation of JMeter, Elements of JMeter, JMeter Functions and User Variables, Best Practices of JMeter, etc.
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Before moving on to the basics of JMeter, here is a quick brush-up of some crucial tests which have gained high popularity in recent times:
Performance tests have become the most essential client expectations at the time of product delivery. There are no takers for slow apps that do not meet the benchmark in terms of speed, loading time, user experience, and design. The test thus checks the performance expectation under a given infrastructure and highlights any changes to be made in the testing process before the application is sent for production. The essential criteria which are tested under the performance testing are:
Although there are many tools for performance testing like LoadRunner, WebLOAD, LoadUI, NeoLoad, etc. JMeter has finally become the most preferred one.
As the name suggests, the test helps to check the performance of the app at its maximum load, as it is designed for. In simple words, load testing is a type of performance testing that triggers an actual load on any software, application, or website.
The test is designed to break the system by subjecting it to tremendous resource weight, so different parts of the same are overwhelmed.
JMeter has attained a level of significance over the years due to its apt performance and reliability. Stefano Mazzocchi of Apache Software was the first to develop it. It is a Java-based application for desktops and makes use of Swing graphical API. Hence it can be used in any environment like Linux, Windows, Mac, etc.
It was developed initially with a view to testing the performance of Apache JServ, which is now known as the Apache Tomcat project. Apache later redesigned JMeter to enhance the Graphical User Interface and addition of other functional capabilities. Apache JMeter 3.1 is the current version which is also available in the market, although there are many more new additions to be added in the future.
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Protocols Supported by JMeter
The popularity of JMeter is due to many reasons which compel businesses and other Quality Assurance Teams to pick it as the primary tool for taking care of performance testing. Here are some of the reasons:
The only system requirement is JDK of 1.6 or above and no specific requirement of memory, disk space, and operating system.
JMeter falls in the Java framework; thus, the first requirement is to have JDK installed on the machine. Once Java is installed, you are next required to set the JAVA_HOME variable. The steps for the same are as follows:
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When Java is installed then, you are required to open the console and execute either one of the Java commands depending upon which Operating System you are working on:
The output of these commands will depend on the operating system used.
Now you have to install & Download JMeter
Once it is downloaded and copied in the C:\>JMeter folder, the directory should look like the following:
The directory apache-jmeter can be renamed if required, but you should not change the names of the sub-directories.
Next, you are required to run JMeter by going to the bin directory. The output will again depend on the Operating System. In the case of
JMeter Graphical User Interface shows up after a short gap. It is a Swing Application and looks like the following:
The above is the primary image of the tool.
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The different components of JMeter are called its elements. Every Element of JMeter has been designed for a particular purpose. Some of the primary elements are:
1). Thread group: It is basically a collection of threads. Every thread stands for a user making use of the application under test. It makes one real user make a server request. The thread group controls also allow for setting the number of threads for every group. E.g., if the number of threads is marked at 100, JMeter will allow for the creation and stimulation of 100 user requests for the server under test.
2). Samplers: Many testing protocols are supported by JMeter like HTTP, FTP, JDBC, etc. As the Thread Groups help in the stimulation of user requests to the server, they are the samplers that assist the thread groups in deciding what requests need to be made like HTTP, FTP, JDBC, etc. Given below is a list of Samplers:
3). Listeners: They present the test execution results in a tree, table, log file, or even a graph.
Also, check out this comprehensive blog to learn how to remove all listeners in an element
4). Configuration: These elements are used for setting up defaults and variables to be used later by samplers. Various types of Configuration Samplers are as follows:
Other components of JMeter include WorkBench, Pre-Processor, Post Processor, Logic Controllers, Timer, Assertions, etc.
JMeter Functions stand for special values that can fill the fields of any Sampler or other element in the test tree. Functions are of two kinds:
The user-defined static values let the user define variables that have to be replaced by static values when the test tree is compiled and has to be submitted to be run. It is not possible to nest these variables.
There are some restrictions on the functions which are used in a Test Plan. The thread values of JMeter are not entirely set up when the functions are processed, so the names of variables that are passed as parameters will not be set up, and the variable references will not work. Hence, split (), regex (), and other variable evaluation functions will not work. The thread num () function will thus not work as it does not make any sense at the test plan level.
Tip: Have a look at these Top Performance Testing Tools when you are just starting your career in software testing.
A Function Helper is present in the Options tab.
JMeter has some limitations but will little carefulness, the resource requirements can be brought down significantly. These are as follows:
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JMeter is an emerging open-source software with a graphical interface by the Apache Software Foundation. It supports many protocols and can be run in any environment. Its popularity is based on many benefits it carries like free availability, intuitive graphical user interface, and is highly extensible.
Considering everything, if you’re required to work on jMeter it’s crucial that you understand all the above-discussed concepts like what is jMeter, what is the use of jMeter in various tests, it’s system requirements, installation of JMeter, elements of JMeter, JMeter functions and user variables, best practices of JMeter, etc. Thus, you’ll be able to work on generating improved reporting and functionality mechanisms on jMeter, which will help in accelerating the complete test process.
In doing so, you will understand the capabilities of JMeter, which is a simple to use performance testing tool. It’ll even ensure effortless performance testing of apps over various devices and platforms. Also, having a credible QA Testing Certification can help you earn a six-figure salary. A professional institute like JanBask Training can help you get the right training.
For more information on JMeter and related technologies, you may refer to JanBask Training or get in touch with us.
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Q1. Why should I enroll in JanBask Training for QA Software Testing Training Program?
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Q2. Why is it essential to learn QA Software Testing Certification Courses?
Studies have shown that the demand for Software Testing is predicted to grow at least 6% by 2026, and the average income of a Software Tester is $63,070 per year in the United States.
Q3. Software Testing is a promising career?
Indeed! It is a promising career. Once you learn to test, numerous job opportunities will be available to you in several companies across the world. There are a plethora of jobs out there in numerous industries seeking to hire these professionals. Besides, Software Testers are among the highest-earning professionals in the world, making testing an excellent career choice.
Q4. What are the prerequisites needed to learn Software Testing?
There are no skills needed before you learn software testing. All the testing courses at JanBaks Training are designed by experts who have taken care of including both primary and advanced-level concepts such that both beginners and professionals can take up these testing tools courses.
Q5. What are the various job opportunities available after doing Software Testing courses online?
Once you complete any of these testing courses, several job opportunities will be available for you, like:
Q6. What are the various Software Testing courses online?
The online testing courses available at JanBask Training are as follows:
Q7. What are the Top QA Testing Specializations offered by JanBask Training?
Top QA Testing specializations offered by JanBask Training includes:
Q8. Who is eligible for this training?
This training is the best choice for :
Q9. What skills will be covered in this QA training?
This QA training cover the following skills:
Q10. How do I know if QA Testing is best for me?
If you’re fond of computers and coding, then QA testing is the best choice for you to learn. It’s a very demanding job at the same time, it's the most challenging as well as an exciting career option one can have. If you’re confused about how to start your QA testing career, get in touch with us today.
Aakanksha Dixit is working as Research Analyst at JanBask Training. She has a flair for writing and believes in exploring new horizons in the IT industry to help the job seekers out there. She is a nature-lover, linguaphile, and a traveler.
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