validate response using jsr223 assertion - jmeter

Question

I have passed chgId as parameter in the get HTTP request.
https://*****?chgId=405
My api response is coming as -
{
"response": {
"data": [
{
"tid": 3697,
"chgId": 405,
"amount": 8.5,
"Currency": "USD",
},
{
"tid": 3698,
"chgId": 405,
"amount": 3.33,
"Currency": "USD",
}
]
}
}
Now from the response I want to validate in JSR223 assertion that the response is correct based on the chgId field. That means in both 'data' array "chgId": 405 text should come.
Can anyone suggest?

Answer 1

You could do something like:
def params = org.apache.http.client.utils.URLEncodedUtils.parse(prev.getURL().toURI(), 'UTF-8')
def expected = params.find { 'chgId' }.value as int
def actual1 = new groovy.json.JsonSlurper().parse(prev.getResponseData()).response.data[0].chgId
def actual2 = new groovy.json.JsonSlurper().parse(prev.getResponseData()).response.data[1].chgId
def success = (expected == actual1 && expected == actual2)
if (!success) {
AssertionResult.setFailure(true)
AssertionResult.setFailureMessage('chgId mismatch')
}
where prev stands for previous SampleResult
More information:
URLEncodedUtils JavaDoc
JsonSlurper
Apache Groovy - Parsing and producing JSON
Scripting JMeter Assertions in Groovy - A Tutorial