I am trying to use the variables captured in the Debug Sampler in Jmeter and then convert those variables into some other value. And then use it somewhere in the script.
I have added a BeanShell Sampler along with the Debug Sampler and tried to get the variables displayed in the Debug Sampler.
Below is the piece of code I have written in Jmeter.
Jmeter
Is my approach correct? Am completely new to Jmeter and have little Java knowledge. So please help me here and let me know how can I convert or use a variable through a Custom code in Jmeter.
It is almost correct, you have a couple of syntax errors (missing closing bracket and undefined SomeCharacter)
Also it is better to use JSR223 Elements and Groovy language rather than Beanshell, as Groovy performance is much better and it is more Java-compliant, see Groovy Is the New Black article for detailed explanation.
Final code should look something like:
def myVariable = vars.get("Corr_ContextN")
if (myVariable.equals("002056653")) {
vars.put("myvariable1", "SomeCharacter")
}
Keep in mind that you are not changing original Corr_ContextN, you are creating new variable myvariable1. Also in order to see new variable you need to move the Debug Sampler after the Beanshell Sampler
Your got the concept but your code has the following errors:
imports are wrong and useless. You only need to import Classes for unbound variables, ie the ones that are advertised in the component.
There's a missing ')' in the if clause
SomeCharacter is not defined
And you should avoid Beanshell and favor JSR223 Test Element with Groovy as per those recommandations:
http://www.ubik-ingenierie.com/blog/jmeter_performance_tuning_tips/
Note that there is also a __groovy function for your use case.
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'm adding a variable on a BeanShell Preprocessor:
vars.put("var",value).
I use it on a WebSocket request:
${var}.
When I send the request, the request body contains '${var}' instead of the value itself.
I tried to use also JSR223 Preprocessor.
I tried to put on the request '${_V(value)' and put it as property but nothing is working
Try using JSR223 Sampler, and this is where you build your logic to initialize the value of your variable. Your variable will be looking like vars.put("var",value);
And after that you can reference the variable from different places in your script like ${var).
I'm using ${var}, not ${value}. (I fixed the question).
Still waiting for answers please
For your issue use statement like:
vars.put("var", vars.get("value")); //Then you can use ${var} elsewhere
Always use a Debug Sampler with View Results Tree for debugging.
I try to move a User Defined variable to variable in beanshell sampler.
(I need the User defined variable to be part of a bigger string.)
When I try to move it, or make a copy of it I get error 500
can someone please advise how can I put the value of user defined field in bean-shell variable and than use it (not need to change the user defined variable just want it value)
In this script I Want to put the value of $Expected_Offer_ID to String variable Expected_Offer
There are (at least) 2 options:
Put ${Expected_Offer_ID} to "Parameter" section of the Sampler. You will be able to access it as Parameters in your script
Use vars.get("Expected_Offer_ID); where required. vars is a shorthand to JMeterVariables class instance, it provides read/write access to all JMeter Variables
Remember 2 things:
Never refer JMeter Variables and/or Functions in the Script body like ${myVar}, either use aforementioned "Parameters" section or code-based equivalents as they might resolve into something which can cause script interpretation failure or unexpected behaviour. Moreover, in case of Groovy language it prevents compiled scripts caching
Don't use Beanshell for scripting. Since JMeter 3.1 it is recommended to use JSR223 Test Elements and Groovy language as Groovy is more Java-compliant and performs much better. See Apache Groovy - Why and How You Should Use It article for more detailed explanation, benchmarks and some tips on Groovy JDK enhancements usage.
JMeter variables are accessed through vars object, use:
String Expected_Offer = vars.get("Expected_Offer");
I want print my json response in jmeter. I used beanshell but it shows error. Below is the line to print json object extracted in "data":
log.info("========"+${data});
Don't ever inline JMeter Functions or Variables into scripts, they may resolve into something which will cause compilation/interpretation failure, use code-based equivalents instead or pass functions/variables via "Parameters" section.
Exhibit A: using vars shorthand
log.info("========" + vars.get("data"));
Exhibit B: using "Parameters" section
Using Beanshell isn't the best scripting option, consider migrating to JSR223 Elements and Groovy language as Beanshell has known performance problems. Moreover, Groovy has built-in JSON support See Apache Groovy - Why and How You Should Use It for details.
And finally your ${data} variable might not be defined (i.e. your extractor fails), in this case you will get interpretation failure on attempt to refer it as ${data}, double check its value using Debug Sampler and View Results Tree listener combination.
In JMeter, how do I save a thread variable in Javascript and reference it from Beanshell on the very next step OR the next threadgroup?
I am using the WebDriver sampler plugin and the WebDriver steps seem to be required to be Javascript commands. I wrote a WebDriver code block in Javascript that goes to a website and gets a cookie value.
How do I set the thread-group variable at the end of the Javascript WebDriver step.
How do I retrieve this value from a Beanshell step.
I have tried various things and haven't got anything to work. For example vars.put works in the WebDriver sampler but props.put says 'props' is not defined. The debug sampler shows that my JMeter property was set wonky like this:
"varName"= varName
After setting it in Javascript like this:
props.put( 'varName', varName )
And that doesn't look right AT ALL.
Tricky thing is that vars isn't accessible to WebDriver Sampler as well, you'll need to be more creative. First of all you need to return value as Sampler result as follows:
WDS.sampleResult.setResponseData("My var value is:" + varName);
After all you need to extract this from response with i.e. Regular Expression Extractor using regular expression like:
My var value is: (.+?)
and varName as Reference Name
And finally add Beanshell Post Processor to your WebDriver Sampler with the code like:
props.put("varName", vars.get("varName"));
to convert JMeter Variable to JMeter Property which has "global" scope and can be re-used in other Thread Groups.
The solution I ultimately found was not the same. Using 'WDS.sampleResult.setResponseData' does not work since the WebDriver Sampler code seems to not allow this.
Turns out that I was able to find a workaround using "headers". Using a Beanshell Sampler step right after the WebDriver Sampler, I am able to modify the headers of the previous result (even though I cannot modify the response data itself) and so from the WebDriver Sampler I am able to store the header using 'WDS.sampleResult.setResponseHeaders( "iCookie:" + iCookie )' . Then, from a subsequent Beanshell Sampler (not a post-processor) I am able to get to that value using 'String header = ctx.getPreviousResult().getResponseHeaders();' as long as I stored the header in this format: "HeaderName:HeaderValue" from WebDriver Sampler.
It is really annoying that I cannot do a similar thing using the .setResponseData method. But, I am happy there is a workaround of some kind since I cannot find any documentation anywhere on what the normal process is for this kind of thing.