I have a series of interconnected pages to test using JMeter. The problem is that the initial page has a Javascript variable in source section which is more of a session variable. This variable is passed in the URL for subsequent pages.
So basically I would like to fetch this javascript variable when I load the initial page from the source section and pass it to next URL(s).
Is there a way I can achieve this using JMeter.
Are you able to see the session variable in the response of initial page?
(in view result tree listener)
If yes, then correlate this value and pass the variable in to next request (use regular expression extractor for fetching the value, still if you are finding some issue in correlating the value than please share the response of first request over here so that I can provide you regx for that)
People mostly Regular Expression Extractor to fetch dynamic values from previous responses, in general the process looks like:
Add Regular Expression Extractor as a child of the request which returns desired data
Use Perl5-style regular expression to match what you're looking for
Provide a template to choose match group - ususally $1$ if you looking for a single value
Provide a reference name to refer the extracted value, i.e. foo
Use extracted value as ${foo} where required
You can visualise JMeter Variables using Debug Sampler and View Results Tree listener combination.
The easiest way to debug your regular expressions is using View Results Tree listener in "RegExp Tester mode"
See How to debug your Apache JMeter script article for more information on troubleshooting your JMeter test.
Related
I have prepared my script using Correlation-regular expression. How can I provide the assertion for account which is selected from .csv file. Here the account selection is stored in a regular expression as follows.
CSV_Data_set_Config, CSV_File_info, Account_Selection_From_UI, Regular_Expression, Sample_Thread_Group, Response_Assertion
Your screenshots are very beautiful but you need to specify what do you want to compare with what in order to get a comprehensive answer.
If you need to compare this 0048852 with the value from the CSV file you need to:
Extract this 0048852 using Regular Expression Extractor or Boundary Extractor
Add Response Assertion as a child of the request and configure it like:
For more detailed response you need to share at least partial HTML code of the page where the dropdown is selected showing the dropdown markup and indicate what exact value you need to "assert"
I am wondering how I can use a dynamic variable in the Path field of a HTTP request . I am able to use User Defined Variables, but they are static, I need to use a variable that extracts some unpredictable value from the response of a previous HTTP request. I.e. the URL in the below scenario resolves literally to /this/and/that.jspx?param1=${testvar} , so you can see ${testvar} is not being substituted. How do I get ${testvar}, a variable created during regex extraction in a previous HTTP Request, to be substituted?
FYI I am using JMeter 2.11 and upgrading may not be an option (corporate policies... )
JMeter Variables resolution/substitution works normally no matter of JMeter version, I can think of 2 possible reasons:
You're looking into wrong place. You should be inspecting Request tab of the View Results Tree listener in order to see the actual URL
Your ${testvar} variable is not defined, i.e. Regular Expression Extractor fails to extract the required value. You can double check it using Debug Sampler:
I am trying to let JMeter crowl my website to ensure a realistic stress test. I was able to extract the URLs from the home page and iterate on them. So I have a regular expression feeding a ForEach loop.
Now I am not able to let an HTTP Request take the output of the loop (Defined as a variable with a name) as its path.
Is there a general approach to setting the path of such a request. JMeter is taking something like:
${MyVar}
set in the path of the request as a string and is not replacing it with the actual value.
Given your Regular Expression Extractor and ForEach Controller configurations are correct everything should work fine. If you need any assistance with this provide the following screenshots:
Regular Expression Extractor configuration
Debug PostProcessor or Debug Sampler output in the View Results Tree listener showing several generated JMeter Variables
ForEach Controller configuration
HTTP Request sampler configuration (i.e. where do you put the variable)
Be aware that you can mimic crawling the site more easily using HTML Link Parser the relevant configuration would be as simple as
See How to Spider a Site with JMeter - A Tutorial to learn more about simulating websites crawling.
I am very new to Jmeter and trying to use it for doing load testing my application.
In my application, every time we click on a template, application will allocate a unique id which to the template...when I recorded the steps using jmeter, a particular unique id was recorded...but when I tried to play the recorded case...it is looking for the same unique id....how do I tell jmeter to get the new id from the application?
Here are the steps
Login as a user,
click on a particular link,
click on a button which will then popup a window asking to select a template,
After selecting a template, my application will create a unique id for that template
It very much depends on whether that template ID is created on the client (i.e. by JavaScript), or on the server (i.e. you can actually record a template ID returned by the server).
If second is your case, then server returns template ID in the response to template selection, so you can use one of the post-processors - a supporting element invoked after the parent request; it usually extracts data from the response and saves it as a variable(s). In your case you'd extract template ID and save it as variable. Later samplers can use the variable in format ${your_name} instead of the recorded hard-coded string. So in that case your plan could look like this:
Which post-processor to use and how to use it depends on the response you are receiving form the server, so cannot be more specific here.
If the first option is your case (JavaScript on the client generates template ID; and your recording only contains usage of said ID), then you can simulate what JavaScript is doing by generating a similar ID using one of the JMeter script-related features: it could be random function, an inline piece of JavaScript code, a scriptable sampler, such as JSR223 Sampler, or... There are many options really, depending on concrete needs of that generated template ID. Again, a more specific question would help to narrow down your choices.
Classic "correlation" example.
Look for that generated ID in the previous responses (you can do it with the View Results Tree listener)
Once you detect it you need to extract it and convert into a JMeter Variable with a PostProcessor (the most commonly used is Regular Expression Extractor, however depending on the nature of your request you may consider to use others
Once you get the ID extracted and stored in the variable - substitute hard-coded value obtained via recording with the JMeter Variable
Repeat steps 1-3 for any other dynamic parameters or values. Or, consider a faster way of creating a JMeter test via alternative recording solution which performs the above steps automatically so you won't have to worry about detecting and handling dynamic elements. See How to Cut Your JMeter Scripting Time by 80% article for details.
You need to check response of the previous request. Normally ID will be created and can be found in the response of previous request and you can use that ID for next request.
You need to first find in which response the ID is being generated and the format of the ID. You can use firebug to see the response in HTML format and find where the id is.
Once you have the format of the id, create regular expression around it. Test it using regex tester that comes with JMeter. Or you can use rubular.com to check the correctness of your regex.
Once you have correct regex, use regular expression postprocessor on the request which returns the id and then use that variable in actual request that uses unique id.
In my application while executing the first request one unique key is generated which key is required for Next all the request. let me how to automate such scenario in Jmeter.
The process should look as follows:
Add Post Processor to the first request
Configure it to extract the required value and store it into a JMeter Variable
Use JMeter Variable from step 2 in your next request.
Depending on response data type you have the following choices:
Regular Expression Extractor - for text
CSS/JQuery Extractor - for HTML
XPath Extractor - for XML and XHTML
JSON Path Extractor - for JSON
It is also possible to extract data from files i.e. if response is in PDF format, but it's a little bit tricky
Example configuration to store the whole response:
Reference Name: any suitable variable name, i.e. response
Regular Expression: (?s)(^.*)
Template: $1$
You can refer the extracted value as ${response} where required. You can also amend the regular expression to extract response part instead of the whole response. JMeter uses Perl5-compatible regular expressions, see Regular Expressions User Manual Chapter for details
You can use regular expression extractor to extract the key from the response of your first request and use the extracted key for subsequent requests. To achieve this:
Right click on the first request and add post processor: Regular Expression Extractor.
Create your regular expression and provide values in other required fields. Please refer to JMeter component reference http://jmeter.apache.org/usermanual/component_reference.html#Regular_Expression_Extractor
Extracted value will be saved in the variable given as reference name
Use this variable in subsequent requests
Here is an example test plan with results.