Best way to validate entire Json response in JMeter

Question

I would like to know best way to verify entire Json response in Jmeter. Can somebody help. Thanks.

Answer 1

The easiest way is use JSR223 Assertion and JsonSlurper class like:

1. Put the anticipated JSON into expected JMeter Variable using i.e. User Defined Variables test element like:

   

2. Add JSR223 Assertion as a child of the request you want to validate

3. Put the following code into "Script" area:

   def expected = new groovy.json.JsonSlurper().parseText(vars.get('expected'))
   def actual = new groovy.json.JsonSlurper().parse(prev.getResponseData())
   
   if (expected != actual) {
       AssertionResult.setFailure(true)
       AssertionResult.setFailureMessage('Mismatch between expected and actual JSON')
   }
   

4. If there will be any difference between expected and actual JSON - the sampler will be marked as failed