Updated February 21, 2023
Definition of JMeter if controller
We know that JMeter is useful for performing load and performance testing. However, if we want more consistency in the application, we can use JMeter if the controller statement. If controller statements in JMeter allow us to manipulate dependence logic per user requirements. In other words, we can say that the If Controller permits the client to control whether the test components underneath it (its kids) are run or not. Of course, the condition is assessed just a single time in the introductory section, yet you have the choice. The if controller statement comes under the conditional statement.
What is JMeter if controller?
JMeter If the controller is exceptionally valuable in any product application’s heap, try utilizing JMeter. If the controller in JMeter permits you to set conditions to assess it, and in light of the condition assessment result, it will choose to run or not to run, assuming the controller’s kid components. If the controller’s assuming condition assessment result is positive, kid components of assuming controller will run or youngster components on the off chance that controller won’t run. We know test programming load testing intends to comprehend utilization of if condition in JMeter.
If our presentation scripts fuse progressed rationale and your heap test needs more intricate execution than running a couple of solicitations in succession, we want progressed instruments. Fortunately, Apache JMeter gives them too. The main one is possibly the JMeter If Controller or the If condition.
Here we are going to perceive how to utilize JMeter’s If Controller. The essential thought of the If Controller is to decide whether to run or not to run a group of kid samplers, as per certain conditions. While the principle thought is basic, there are many inquiries and issues around this regulator.
JMeter if controller Usage
Now let’s see the uses of the if controller as follows.
1. If we need to execute elements of the Thread Group based on their state at that time, we can use if controller.
2. Using the if controller, we provide control over the test execution per our requirement.
3. Using the if controller, we can check the Interpret condition.
4. We can also evaluate the runnable elements from the controller.
5. It allows us to implement the Boolean operator per our requirements.
JMeter if controller Configuration
Now let’s see how we can configure if controller in JMeter as follows.
If the controller consists of different parameters, we must configure it first.
Name: Name is the first parameter we need to configure; it is used to identify the element in the JMeter element tree.
Comments: the field that you can use to incorporate a distinct clarification of a predetermined condition (here and there, a condition may be extremely convoluted, and it’s helpful to leave such remarks as a source of perspective)
Articulation (should be valid or bogus): a condition that is confirmed by the execution stream to choose if kids’ components ought to be executed or not. Of course, the condition is deciphered as a Javascript code that profits “valid” or “bogus.”
Decipher Condition as Variable Expression: this boundary is intended for situations when you don’t have to assess Javascript code. The default strategy takes and deciphers a predetermined condition as Javascript code, and after that, it confirms, assuming the outcome rises to valid or bogus. In any case, on the off chance that you select this boundary, no Javascript understanding will be utilized, and the condition will be dealt with like a JMeter variable (you can relax, we will cover this completely in one of the models further on)
Assess for all youngsters: if this property is chosen, the predetermined condition will be checked for every kid section, not just once, as it is finished naturally.
JMeter also allows performing the different operations using an if controller such as simple conditional operation, comparison operation, Boolean operation, etc.
JMeter if controller Examples
Now let’s see the example of the if controller for better understanding.
1. First, we need to open the JMeter on our local machine and add the Thread Group; in the next step, we need to add the random variable, as shown in the following screenshot.
2. Next, we need to enter the variable name and size of the variable; here, we assign a sample name, and the max size is 150, as shown in the following screenshot.
3. In the third, we need to enter the if controller statement to the specified Thread Group and write the condition we want, as shown in the following screenshot.
In the above screenshot, we can see if the controller statement that is ${sample}<100 and uncheck the Interpret condition.
4. Now, in the next step, we need to add if controller as shown in the following screenshot.
5. We added a sampler, as shown in the following screenshot.
6. We need to add the view result tree to the specified Thread Group we already created, as shown in the following screenshot.
Save and run the test plan after the execution, assuming that you look at the solicitation, at whatever point the worth is under 100, the fake sampler inside the if the regulator will execute in any case the Dummy sampler which is outside assuming the regulator will execute.
So in this way, we can implement the id controller as per our requirement with a different type of operation.
Conclusion
We hope from this article you learn more about JMeter if controller. From the above article, we have taken in the essential idea of JMeter if controller, and we also see the representation and example of the JMeter if controller. Furthermore, this article taught us how and when to use the JMeter if controller.
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