I am new to Jmeter. I am testing rest API using Jmeter. In one scenario need to pass dynamic random variable in request. The pattern is starting character should be an alphabet and remaining 9 characters numbers (0-9) example "J123456789". Please suggest me how to do it using Jmeter random functions.
You can go for __RandomString() and __Random() functions combination like:
${__RandomString(1,ABCDEFGHIJKLMNOPQRSTUVWXYZ,)}${__Random(111111111,999999999,)}
Demo:
More information on JMeter Functions concept: Apache JMeter Functions - An Introduction
Related
I'm capturing multiple values with a regular expression, and that expression returns 20 matches as shown in image RegExMatches,
My regular expression is something like this RegEx.
How do I use multiple values in post data of my HTTP request which is something like PostData
I tried with MatchNR and -1 and call with ${candidateGUID_gN} N being the match number but this didn't workout.
How do I use the Extracted values in Post data ? or will I have to make different Regular Expressions for each value ?
I think the only way of achieving this is building your request using JSR223 PreProcessor and Groovy language, take a look at the following JMeter API shorthands:
Arguments
vars aka JMeterVariables
sampler aka HTTPSamplerBase
More information: Top 8 JMeter Java Classes You Should Be Using with Groovy
And please stop posting code as images it's not very polite / disrespect to the community.
Using Jmeter n my Json response couldn't extract the below "_MESSAGE_" response value as well need to capture first five value in our variable like (10000) alone
"{\"_STATUS_\":\"SUCCESS\",\"_MESSAGE_\":\"10000,1111111111\"}"
Note : This is invalid json and dev team not supporting to build the right json.
it's high priority task - anyone have a solution for this issue. please share your input.
I am looking for the solution to extract the "_MESSAGE_" and need to capture first five value in our variable like (10000) alone
You can use Boundary Extractor and use "MESSAGE":" as left boundary
and , as right boundary
Given response is not a valid JSON you have 2 options:
Regular Expression Extractor, the relevant regular expression would be something like:
"MESSAGE":"(\d{5})
See Regular Expressions chapter of JMeter user manual for explanation of what do these (), \ d and {5} mean
Boundary Extractor where you can just provide "left" and "right" boundaries and JMeter will extract everything in-between
More information: The Boundary Extractor vs. the Regular Expression Extractor in JMeter
I have a user defined variable that contains several elements:
a,b,c,d,e,f
Is it possible to use the lenght of the above 'array' to pass as Number of Threads?
I tried using a beanshell function like this:
${__BeanShell(vars.get("users_username").split(",").length,)} but it does not seem to work.
As per JMeter Functions documentation
If a function parameter contains a comma, then be sure to escape this with "\", otherwise JMeter will treat it as a parameter delimiter
Since JMeter 3.1 it is recommended to use __groovy() function instead of other scripting options/languages mainly because Groovy performance is much better than alternatives
Assuming all above you can dynamically define the number of threads as:
${__groovy(vars.get("users_username").split("\,").length,)}
If we are having dynamic left and right boundary in response, then how to correlate them in Jmeter?
I found few useful article to correlate in Loadrunner, by using text flag in web_reg_save_param like "/DIG", "/BIN", "/ALNUM", "/IG". Or we can do that using web_reg_save_param_regexp.
In Jmeter you use the relevant Regular expression in Regular Expression Extractor added as a post processor of the request.
for example for LoadRunner correlation:
Source: “GraphA123567EndGraphA”
Solution:
web_reg_save_param_regexp(“ParamName=CorrValue”,
“RegExp=\“Graph[A-Za-z]\”, \“([0-9]+)\”, \“EndGraph[A-Za-z]\””, LAST);
Result: 123567
You will use Regular Expression:
Graph([A-Za-z]+)(\d+)EndGraph([A-Za-z]+)
with Template: $2$ to get relevant group and in Jmeter ParamName is Reference Name
JMeter doesn't operate "boundaries", the most popular Post Processor is Regular Expression Extractor which can handle both static or dynamic "boundaries" which you can set using Perl5-style regular expressions.
For example if you want to extract numeric value between foo and bar the relevant JMeter regular expression would be foo(\d+)bar
If you are looking for a mix of numbers and letters you can use foo(\w+)bar
The same approach you can follow if your response data is like foo1_A_VERY_INTERESTING_STRING_bar2 where 1 and 2 are dynamic:
More information:
JMeter: Regular Expressions
Using RegEx (Regular Expression Extractor) with JMeter
Perl 5 Regex Cheat sheet
In Jmeter, I can able to extract the value using regular expression extractor, but while parsing the value I need some changes in the value as below.
Example,
Suppose If I extract this value in regular expression extractor (single Value in multiple lines),
PHNhbW+xwO
U0FNTDoyL
cmFjbGUu+
Here
I Need to replace + by %2B, need to add %OD%OA at the end of each line and multiple lines to a single line as below.
PHNhbW%2BxwO%OD%OAU0FNTDoyL%OD%OAcmFjbGUu%2B%OD%OA
I need to parse this as a single parameter value.
I think you can use __javaScript() function which allows calling arbitrary JavaScript code and inside JMeter __javaScript() funciton you can call EcmaScript EncodeURIComponent() function
It will automatically convert all newline characters \r\n to %OD%OA and + to %2B and in fact any character except alphanumeric and these ones:
_ . ! ~ * ' ( )
Demo:
See Using JMeter Functions guide for comprehensive information on how to deal with the functions in JMeter