I'm very new at JMeter issues.
In a test script i have a BeanShell PreProcessor element that updates some variables previously defined at a "User Defined Variables" element.
Latter those variables are used in "Http Requests". However, the value that is used in the http request is the default one.
The scripts seems to be working due to some debug print();
My question is if it's necessary to delay the script to be sure that the BeanShell finishes?
Thanks a lot for your attention
There is no need to put any delay to Beanshell Pre-Processor as it's being executed before request. I'd recommend to check your jmeter.log file to see if there are any scripting issues as Beanshell Pre-Processor does not report errors anywhere including View Results Tree listener.
There are at least 2 ways to assure that everything is fine with your Beanshell script:
Put your debug print code after variables replace logic to see if it fires
Use JMeter __Beahshell function right in your HTTP request. If it's ok - View Results Tree will demonstrate beanshell-generated value. If not - the field will be blank and relevant error will be displayed in the log.
Example test case:
Given following Test Plan structure:
Thread Group with 1 user and 1 loop
HTTP GET Request to google.com with path of / and parameter q
If you provide as parameter "q" following beanshell function:
${__BeanShell(System.currentTimeMillis())}
and look into View Results Tree "Request" tab you should see something like:
GET http://www.google.com/?q=1385206045832
and if you change function to something incorrect like:
${__BeanShell(Something.incorrect())}
you'll see a blank request.
The correct way of changing existing variable (or creating new if variable doesn't exist) looks like
vars.put("variablename", "variablevalue");
*Important: * JMeter Variables are Java Strings, if you're trying to set something else (date, integer, whatever) to JMeter Variable you need to cast it to String somehow.
Example:
int i = 5;
vars.put("int_i", String.valueOf(i));
Hope this helps.
You can update the vale of a "user defined variable".
You have to create a bean shell sampler
vars.put("user_defined_variable", "newvalue");
#theINtoy got it right.
http://www.blazemeter.com/blog/queen-jmeters-built-componentshow-use-beanshell
I'm new to jmeter too but as I know variables defined in "User defined variables" are constants, so you can't change them. I recommend to use "User Parameters" in preprocessors or CSV Data Set Config.
Related
Does Karate supports a feature where you can define a variable in a scenario and reuse it in other scenarios in the same feature file. I tried doing the same but get an error. What's the best way to reuse the variables within the same feature file ?
Scenario: Get the request Id
* url baseUrl
Given path 'eam'
When method get
Then status 200
And def reqId = response.teams[0]resourceRequestId
Scenario: Use the above generated Id
* url baseUrl
* print 'From the previous Scenario: ' + reqId
Error:
Caused by: javax.script.ScriptException: ReferenceError: "reqId" is not defined in <eval> at line number 1
Use a Background: section. Here is an example.
EDIT: the variable if in the Background: will be re-initialized for every scenario which is standard testing framework "set up" behavior. You can use hooks such as callonce - if you want the initialization to happen only once.
If you are trying to modify a variable in one scenario and expect it to be now having that modified value when the next Scenario starts, you have misunderstood the concept of a Scenario. Just combine your steps into one Scenario, because think about it: that is the "flow" you are trying to test.
Each Scenario should be able to run stand-alone. In the future the execution order of Scenario-s could even be random or run in parallel.
Another way to explain this is - if you comment out one Scenario other ones should continue to work.
Please don't think of the Scenario as a way to "document" the important parts of your test. You can always use comments (e.g. # foo bar). Some teams assume that each HTTP "end point" should live in a separate Scenario - but this is absolutely not recommended. Look at the Hello World example itself, it deliberately shows 2 calls, a POST and a GET !
You can easily re-use code using call so you should not be worrying about whether code-duplication will be an issue.
Also - it is fine to have some code duplication, if it makes the flow easier to read. See this answer for details - and also read this article by Google.
EDIT: if you would like to read another answer that answers a similar question: https://stackoverflow.com/a/59433600/143475
Does Karate supports a feature where you can define a variable in a scenario and reuse it in other scenarios in the same feature file. I tried doing the same but get an error. What's the best way to reuse the variables within the same feature file ?
Scenario: Get the request Id
* url baseUrl
Given path 'eam'
When method get
Then status 200
And def reqId = response.teams[0]resourceRequestId
Scenario: Use the above generated Id
* url baseUrl
* print 'From the previous Scenario: ' + reqId
Error:
Caused by: javax.script.ScriptException: ReferenceError: "reqId" is not defined in <eval> at line number 1
Use a Background: section. Here is an example.
EDIT: the variable if in the Background: will be re-initialized for every scenario which is standard testing framework "set up" behavior. You can use hooks such as callonce - if you want the initialization to happen only once.
If you are trying to modify a variable in one scenario and expect it to be now having that modified value when the next Scenario starts, you have misunderstood the concept of a Scenario. Just combine your steps into one Scenario, because think about it: that is the "flow" you are trying to test.
Each Scenario should be able to run stand-alone. In the future the execution order of Scenario-s could even be random or run in parallel.
Another way to explain this is - if you comment out one Scenario other ones should continue to work.
Please don't think of the Scenario as a way to "document" the important parts of your test. You can always use comments (e.g. # foo bar). Some teams assume that each HTTP "end point" should live in a separate Scenario - but this is absolutely not recommended. Look at the Hello World example itself, it deliberately shows 2 calls, a POST and a GET !
You can easily re-use code using call so you should not be worrying about whether code-duplication will be an issue.
Also - it is fine to have some code duplication, if it makes the flow easier to read. See this answer for details - and also read this article by Google.
EDIT: if you would like to read another answer that answers a similar question: https://stackoverflow.com/a/59433600/143475
Does Karate supports a feature where you can define a variable in a scenario and reuse it in other scenarios in the same feature file. I tried doing the same but get an error. What's the best way to reuse the variables within the same feature file ?
Scenario: Get the request Id
* url baseUrl
Given path 'eam'
When method get
Then status 200
And def reqId = response.teams[0]resourceRequestId
Scenario: Use the above generated Id
* url baseUrl
* print 'From the previous Scenario: ' + reqId
Error:
Caused by: javax.script.ScriptException: ReferenceError: "reqId" is not defined in <eval> at line number 1
Use a Background: section. Here is an example.
EDIT: the variable if in the Background: will be re-initialized for every scenario which is standard testing framework "set up" behavior. You can use hooks such as callonce - if you want the initialization to happen only once.
If you are trying to modify a variable in one scenario and expect it to be now having that modified value when the next Scenario starts, you have misunderstood the concept of a Scenario. Just combine your steps into one Scenario, because think about it: that is the "flow" you are trying to test.
Each Scenario should be able to run stand-alone. In the future the execution order of Scenario-s could even be random or run in parallel.
Another way to explain this is - if you comment out one Scenario other ones should continue to work.
Please don't think of the Scenario as a way to "document" the important parts of your test. You can always use comments (e.g. # foo bar). Some teams assume that each HTTP "end point" should live in a separate Scenario - but this is absolutely not recommended. Look at the Hello World example itself, it deliberately shows 2 calls, a POST and a GET !
You can easily re-use code using call so you should not be worrying about whether code-duplication will be an issue.
Also - it is fine to have some code duplication, if it makes the flow easier to read. See this answer for details - and also read this article by Google.
EDIT: if you would like to read another answer that answers a similar question: https://stackoverflow.com/a/59433600/143475
I have a basic function in BeanShellSampler.bshrc at Jmeter 4.0
String getMyString(String strParam) {
return "MyString: "+strParam;
}
I called in BeanShell Sampler as below
String N = "123123";
log.info("${__BeanShell(getMyString("${__V(Var${N})}"),)}");
When I run Sampler output is somthing like that.
2018-06-18 15:25:40,080 INFO o.a.j.u.BeanShellTestElement: MyString: Var${N}
How can I set string variable to my function?
I read function articles in Jmeter web site
Thank you.
Add the next line to user.properties file:
beanshell.sampler.init=BeanShellSampler.bshrc
Amend your code to look like:
String N = "123123";
log.info(getMyString(N));
That's it, you should get MyString: 123123 in jmeter.log file
Be aware that starting from Jmeter 3.1 it is recommended to use Groovy for all forms of scripting as Groovy performance is much better comparing to Beanshell so consider taking the following steps instead:
Create a file, i.e. foo.groovy in "bin" folder of your JMeter installation and put your function there:
String getMyString(String strParam) {
return "MyString: " + strParam;
}
Add the next line to user.properties file:
You should be able to refer your custom code from __groovy() function like:
${__groovy(log.info(getMyString("123123")),)}
functions can be used anywhere in the Test Plan
For each BeanShell Program type there are different beanshell.*.init properties defined in bin/user.properties
beanshell.function.init=BeanShellFunction.bshrc
beanshell.preprocessor.init=BeanShellSampler.bshrc
beanshell.postprocessor.init=BeanShellSampler.bshrc
beanshell.assertion.init=BeanShellFunction.bshrc
Hence the same function which needs to be called from any program(preprocessor, postprocessor, etc) we need to copy the function to every .bshrc file OR use same .bshrc file for every program init property.
In your case if you are using local string variable N and passing it along with the script. If you use ${Variable} there must be a JMeter variable defined so that JMeter can pick its value. To do that you can use vars.put , write N value to JMeter variables and use ${N} .
I have defined Var123123 value as FinalValue as shown below
And 2 beanshell samplers one is to put String variable N to Jmeter variable and one is beanshell script as shown below
You can see in the log its printed VAR123123's value which is FinalValue
The reason why i took 2 beashell samplers is if i write N to JMeter variables and use it in same script its not updating N value until the sampler executed..
References :
Configuring JMeter
JMeter Beanshell
Please let me know if it helps
Here is the simple code
vars.put("str" , "${__time(dd/mm/yyyy HH:MM:SS)}");
log.info("${str}");
I am expecting to see the value of str in logs but I am getting ${str}. I am validating it because I have to assign the current time to a variable and later want to use it in script. But I am not getting the value stored in str.
try as follows using vars.get:
vars.put("str" , "${__time(dd/mm/yyyy HH:MM:SS)}");
log.info("str " + vars.get("str"));
I wouldn't recommend inlining functions and/or variables into Beanshell script as you may face syntax error issues, i.e. type mismatch if the value has quotation marks.
So either use log.info(vars.get("str")); or use Debug Sampler and View Results Tree listener combination to see JMeter variables values.
More information: How to Debug your Apache JMeter Script