When opening JMeter's Function Helper and try to execute chooseRandom (added with jmeter plugin)
It failed because it expect at least 3 parameters and JMeter display only 2
org.apache.jmeter.functions.InvalidVariableException: __chooseRandom called with wrong number of parameters. Actual: 2. Expected at least: 3.
Is there a way to execute it inside Function Helper?
If not, is it JMeter or JMeter plugin bug?
I don't think you will be able to validate the __chooseRandom() function with the help of the Function Helper Dialog because when you populate the list of values to choose from it escapes the commas with the backslashes:
I don't think the issue will be considered by JMeter developers (however you can ask) as it's a 3rd-party plugin. Neither JMeter Plugin developers/maintainers would refactor the function as it will break backwards compatibility.
You can ask around because I might be wrong, in the meantime you can validate the function output using i.e. Debug Sampler and View Results Tree listener combination
Related
Please tell me why the code in comments (both /*something*/ and //something) is executed using JSR223 Sampler & BeanShell sampler?
For example, I have:
and in the next JSR223 Sampler I have:
and the result is:
and the question is: why this code: "/${__setProperty(checkProperty, 50)};/" is executed regardless of that it is in comment and it is in wrong condition?
JMeter Functions are being executed in the place where they're found, no matter where it is, in Sampler label, comments section, sampler body, etc.
Actually inlining JMeter Functions and/or Variables into JSR223 scripts is not the best idea as
it might conflict with Groovy's string interpolation syntax
the function or variable might resolve into something causing script compilation failure or logic error
and last but not the least Groovy will cache the first occurrence and use it for subsequent iterations
So if you need to set a property - use props.put() function like
props.put('foo', 'bar')
And finally I'm not sure that using props.clear() is a good idea because there are some pre-defined JMeter properties (you can check yourself using Debug Sampler and View Results Tree listener combination) and it might result into unexpected behaviour if a test element will be relying on that property existence and/or value
I have a problem, I'm doing a test with jmeter and I need to know how to change the value of a variable that has a space, example "pro va" with "pro% 20va" this because then this variable will be used to do a query on an endpoint example "www.google.com/search?q=pro%20va"
Use __javaScript() function to call encodeURIComponent() function:
${__javaScript(encodeURIComponent("${myVar}"),)}
Put your variable in "Path" field of the HTTP Request sampler - it will be encoded automatically
Demo:
If you have the choice - go for 2nd option as using JavaScript is some form of performance anti-pattern, if you target to use the approach for high loads - it's better to implement the encodeURIComponent() function in Groovy
I'm new to JMeter. I want to create a user defined function and have to do verification in it. I don't know how to do it. Can anyone help me for this..?
Thank you in advance
Along with other answers, you can also come up with our own function to make it appear in JMeter as shown below.
Check here for step by step tutorial for the implementation.
I think you need to go for scripting-based Assertion, i.e.
Beanshell Assertion
JSR223 Assertion
Both allow executing arbitrary code and conditionally set associated sampler success or failure. See How to Use JMeter Assertions in Three Easy Steps article for more information on using assertions for setting pass/fail criteria on JMeter samplers.
You can use JSR223 Sampler to write the custom code in Java/Groovy/Javascript etc (chose from Language dropdown).
Pre and Post processors, Assertions also available for JSR223.
I've got a Jmeter test up and running on an API I'm building.
The API returns this if it gets overloaded:
{"status":{"type":"failure","cause":"internal","http":500}}
What I'd like to do is have JMeter also PAUSE if it gets that result.
I already have set up a Response Assertion that captures these errors. It seems like this should be a simple thing to set up, but I'm not seeing it. I see that I can add an If Controller, but that only works with Javascript vars.
Do I need to add a Regular Expression Extractor, grab that 'failure' as 'type' variable, and then add that to the If Controller?
Seems a little over-complicated?
Am I missing something?
Try to use BeanShell Timer to handle this situation.
It
allows scripting so you can program timer behavior how you need;
has access to jmeter context - via ctx variable - so you can handle ResponseCode condition.
Here you can find good article with example how to use.
And here - how to access beanshell variables and handle response code.
Your condition will be something like this one:
if (prev.getResponseCode().equals("500") == true) {
. . .
}
PLEASE NOTE: script used in BeanShell Timer should return value is used as the number of milliseconds to wait.
Another question is what the reason to do this.
If you have load/stress-test scenario then these results are something you should get during your tests and analyze then.
If you have kind of "functional" test-scenario so you have to handle this situation in more general way, adding any kind of properly configured timer to each sampler - to avoid overload or simulate "real-life" scenario.
Am I missing something?
I've created a custom function in JMeter that returns a n length string with random characters. Where should I define the function, and how do I call it?
As long as your function is in the jmeter classpath, you should be able to call it just like any standard function with ${...} syntax, as described here.
Do make sure your jar file containing your function is in lib/ext, or added to the jmeter classpath via search_path's input option
You can do this in a beanshell script or via a javascript call. See the manual on
functions and on the beanshell preprocessor.