In this blog post we are going to discuss using JMeter localised to a language other than English.
We are not discussing computer languages that are supported.
We will look at currently supported languages and how to change your local instance to use these languages.
We will also look at how you can submit a language translation if you would like to and have the ability to.
Among the many elements JMeter offers for creating test scenarios, the ForEach loop stands out as an efficient way of browsing and processing data.
The ForEach loop in JMeter is a controller that allows you to cycle through the elements of a list or variable, executing the test samples included in the loop for each element iteratively. This is particularly useful when you need to perform tests with dynamic data, or when you want to repeat a sequence of samples for different values.
The ForEach loop simplifies the management of test scenarios involving dynamic data, reducing complexity and development time.
Improved maintainability:
By using the ForEach loop, test scenarios remain easily understandable and modifiable, facilitating long-term maintenance.
Dynamic test scenarios:
In this blog post we are going to look at simulating the process of uploading an image to a web-site in JMeter for load testing.
Image uploading is a relatively straightforward process to simulate in JMeter. There are a few different ways to approach this, which we will explore.
In order to follow along, you can download the sample JMX here.
Before we start to look at uploading images with JMeter, we are going to need a test site to use.
We will use an online image upload site for the purposes of this blog post as it makes the upload process easy to follow.
You may have an image upload site in your organization, or you may be reading this for understanding how to upload image to an application you are testing. In any case, the way JMeter handles uploading images is the same.
In this blog post, we will run JMeter tests from code. First we will look at how we can create an IntelliJ project in Java to build a JMeter performance test.
Once you understand how JMeter tests in code can be written you can start to build tests in your development code base to compliment unit tests or functional tests written by developers during the creation of application and services.
In a DevOps world it is the responsibility of developers to support all development effort with a suitable and robust set of tests that are run as the code is built and deployed into the various non-prod and prod style environments and your performance tests can sit alongside these.
We have chosen to use IntelliJ due to its widespread use and we have chosen to create a Maven project to allow us to import the JMeter dependencies.
Clearly your preference may be different, but the principles remain the same.
We will build and execute this as a stand-alone project to demonstrate the principles but once you are happy with how it works there is no reason you cannot build similar performance tests in your application development codebase or even pair with the development teams to build a performance capability in your deployment pipelines.
We are going to look at how JMeter outputs to both the log panel in GUI mode and the log file in non-GUI mode. We will look at the properties relating to the GUI log panel and the Appenders and Loggers that determine what data is output and at what level the logs are output at.
JMeter uses log4j to provide its logging mechanism and from the log4j website:
Log4j has three main components: loggers, appenders and layouts. These three types of components work together to enable developers to log messages according to message type and level, and to control at runtime how these messages are formatted and where they are reported.
We will look at how Jmeter configures Appenders and Loggers separately but they work together to produce the logged output.
The logging level can be set in several ways:
We will explore all of these during this post. Note that you can download the sample JMX here.