javascript exception in while controller in jmeter

Question

I have been trying the javascript in jmeter while controller, and am using below function

${__javaScript(("${app_status_g1}".indexOf("100") == -1 && ${App_status_counter} < 10),)}

app_status_g1 is extracted from the regex extractor inside the while controller

However, I get the exception jmeter logs:

JavaScript: Error processing Javascript: [("${app_status_g1}".indexOf("100") == -1 && ${App_status_counter} < 10)]
javax.script.ScriptException: <eval>:1:45 Expected ) but found {
("${app_status_g1}".indexOf("100") == -1 && ${App_status_counter} < 10)
                                             ^ in <eval> at line number 1 at column number 45

Tried few combinations with parentheses but not able to get the cause of problem. But looks like while controller still works.

Any help will be appreciated.

Answer 1

Mind that JMeter users are strongly recommended to use JSR223 Test Elements with Groovy language and/or __groovy() function for any form of scripting as JavaScript interpreter performance might become the bottleneck and ruin your test.

So consider switching to __groovy() function, the equivalent syntax would be:

${__groovy((!vars.get('app_status_g1').contains('100') && ((vars.get('App_status_counter') as int) < 10)),)} 

Answer 2

You have to type cast ${App_status_counter} to int from String , Because ${App_status_counter} is a String type variable and you cannot compare it directly.

use parseInt(${App_status_counter})<10

So the condition in while loop could be

${__javaScript(("${app_status_g1}".indexOf("100") == -1 && parseInt(${App_status_counter}) < 10),)}

For more information on while loop please follow this link

and here is the link working with multiple conditions in while loop

Please let me know if it helps