I am using JMeter to test a web application. The application returns JSON that looks like the following:
{"type":"8","id":"2093638401"}
{"type":"9","id":"20843301"}
{"type":"14","id":"20564501"}
I need to get a count based on type.
I have tried adding foreach controller with a regular expression extractor, but Im not sure I have done it correctly:
Apply to: Main sample only
Response field to check: Body
Reference name: match_type
Regular Expression: "type":"(\d)"
Template: $1$
Match no.: -1
Im new to JMeter so Im not sure if Im doing any of this correctly.
Thanks
If you want to operate on both type and id in single sampler, I think simple regex and ForEach controller won't be sufficient. You will have to write two regex extractor followed by while controller with BSF processor (javascript or beanshell) to extract both the values and export them to jmeter variable. Something of following type
- First Request
- Regex extractor for type
- Regex extractor for id
- BSF processor (to initialize the loopcount=0 and the total_matches of matches that you found)
- while controller (loopcount < total_matches)
- BSF processor
- export/set current_type = type_$loopcount
- export/set current_id = id_$loopcount
- increment loopcount
- USE current_type and current_id in whatever sampler you like
== Update ==
This http://goo.gl/w3u1r tutorial depicts exactly how to go about it.
Related
Hi All / Dimitri T Could you please post your valuable thoughts on extracting corresponding Values (For example ItemID1 and ItemSlot1) in one block of code randomly. I was able to write below Jsr223 postprocessor code and it is working fine. But when there are Blank spaces in ItemSlot id, then they are not fetching. From below code , i am passing ${rannum} under "Match No" in required regular expression.
Note: There will be more than 100 corresponding values. In some cases, we won't have ItemSlot1.i.e Blank/null values are appearing from server response. Hence, my script is not picking corresponding values.
Application Server Response:
"viewSaleListingLink": "https://Example.com/cars/item/search/-/listing/ItemID1/100011142",
"saleCountry": "",
"saleNote": "",
"bidLiveUrl": "https://Example.com/cars//registration?p_p_id=RegistrationPortlet_WAR_PWRWeb&p_p_lifecycle=1&p_p_state=normal&ItemSlot1=103009468",
JSR223PostProcessor Code
import java.math.MathContext;
import java.math.RoundingMode;
// Read occurance values from pervious response
def Max = Integer.parseInt( vars.get("ItemID1_matchNr"));
int min=1;
int rannum = min + (int) (Math.random() * ((Max - min) + 1));
log.info("Values id ="+rannum);
vars.put("rannum",rannum.toString());
enter image description here
If you need to extract a random match/pair of matches from the response using Regular Expression Extractor - it's sufficient just to provide 0 as the "Match No" and it will automatically fetch the random match group so you won't have to write any code:
Also be aware that Post-Processors are executed in the order they appear (upside down) so:
If your JSR223 PostProcessor is above the Regular Expression Extractor - ItemID1_matchNr will be undefined
If your JSR223 PostProcessor is below the Regular Expression Extractor - your rannum variable won't have any value
Also your response seems to be JSON so it makes sense switching to JSON JMESPath Extractor which is more powerful and convenient
How to achieve a kind of mapping between string and numeric values that can be used for comparison in assertion? Example:
MAP "DELIVERED"=0
"PENDING"=1
"WAITING"=2
sampler1 - extracted numeric_value=0
sampler2 - assert string value="DELIVERED" is equal to its numeric value
Please check the below test plan:-
I have used variable name from regular expression of 1st sampler in the switch controller like ${regVar}..Then used the second request 3 times i.e. 0,1,2 and used response assertion with the desired value like "DELIVERED"=0 for first sampler under switch i.e "0" then in second "PENDING"=1 i.e "1"..so on.
With this, based on the regEx value from 1st http sample, only one http request will be send for 2nd sampler and that request have it own assertion. I have tried with both positive and negative cases. Please change the assertion value based on your requirements.
Please check if it helps.
Be aware of JSR223 Assertion which allows you to use arbitrary Groovy code to define pass/fail criteria.
You can access the numeric_value using vars shorthand for JMeterVariables class like:
def numericValue = vars.get('numeric_value')
Example code:
def myMap = ['0':'DELIVERED', '1':'PENDING', '2':'WAITING']
def numericValue = vars.get('numeric_value')
log.info('Numeric value is: ' + numericValue)
log.info('Status is: ' + myMap.get(numericValue))
Demo:
More information: Scripting JMeter Assertions in Groovy - A Tutorial
Thanks Dmitri, implemented solution based on your suggestion and it suites fine.
Regular expression is fetching 9 values
Need to add all these ticked values with comma separation in next request.How can we do this in J meter
How can we pass multiple values extracted via regular expression to next request in JMeter
Can you please share some snippet of the HTML response, I'd like to help you with the answer. Also, at times, using an XPath expression in an XPath Extractor can be easier to work with.
If the reference name for is set to VALUE, then you can access each of the 9 matched values as VALUE_1, VALUE_2, ...... VALUE_9
Given you configure your Regular Expression Extractor as follows:
Reference Name: arg_name
Regular Expression: `arg_names" value="(.+?)"
Template: $1$
Match No.: -1
You will get JMeter Variables like:
arg_name_1=foo
arg_name_2=bar
arg_name_3=baz
arg_name_matchNr=3
Now you should be able to concatenate the values using the following __groovy() function:
${__groovy(def builder = new StringBuilder(); 1.upto(Integer.parseInt(vars.get("arg_name_matchNr"))) { builder.append(vars.get("arg_name_" + it)).append("\,") }; builder.toString(),)}
Demo:
More information:
vars is a shorthand to JMeterVariables class instance
Groovy For Loop Examples
Apache Groovy - Why and How You Should Use It
I am using Jmeter for performance testing and stuck at following point:
I am getting a JSON response from Webapi as follows:
PersonInfoList:
Person
[0]
{
id: 1
name: Steve
}
[1]
Person
{
id: 2
name: Mark
}
I need to get the ids based on the count of this JSON array and create a comma separated string as ("Expected value" = 1,2)
I know how to read a particular element using JSON Post processor or Regex processor but am unable to loop through the array and create a string as explained so that I can use this value in my next sampler request.
Please help me out with this: I am using Jmeter 3.0 and if this could be achieved without using external third party libs that would be great. Sorry for the JSON syntax above
Actually similar functionality comes with JSON Path PostProcessor which appeared in JMeter 3.0. In order to get all the values in a single variable configure JSON Path PostProcessor as follows:
Variable Names: anything meaningful, i.e. id
JSON Path Expressions: $..id or whatever you use to extract the ids
Match Numbers: -1
Compute concatenation var (suffix _ALL): check
As a result you'll get id_ALL variable which will contain all JSON Path expression matches (comma-separated)
More "universal" answer which will be applicable for any other extractor types and in fact will allow to concatenate any arbitrary JMeter Variables is using scripting (besides if you need this "expected value and parentheses)
In order to concatenate all variables which names start with "id" into a single string add Beanshell PostProcessor somewhere after JSON Path PostProcessor and put the following code into "Script" area
StringBuilder result = new StringBuilder();
result.append("(\"Expected value\" = ");
Iterator iterator = vars.getIterator();
while (iterator.hasNext()) {
Map.Entry e = (Map.Entry) iterator.next();
if (e.getKey().matches("id_(\\d+)")) {
result.append(e.getValue());
result.append(",");
}
}
result.append(")");
vars.put("expected_value", result.toString());
Above code will store the resulting string into ${expected value} JMeter Variable. See How to Use BeanShell: JMeter's Favorite Built-in Component article for more information regarding bypassing JMeter limitations using scripting and using JMeter and Java API from Beanshell test elements.
Demo:
The response I get back from a post is just a plain text guid seen here I'd like to pull this guid and use it in a variable for my following Get statement:
post response data
And I've tried a bunch of configurations in my regular expression extractor.
But it just ends up pulling Null when what I want is that guid.
Null
I'm new to jmeter - so thank you in advance for the help.
If you need the whole response use the following Regular Expression Extractor configuration:
Reference Name: response
Regular Expression: (?s)(^.*)
Template: $1$
As per How to Extract Data From Files With JMeter guide:
() = grouping
(?s) = single line modifier
^ = line start
. = wild-card character
* = repetition
So it will return the whole response.