extract_binds usage help is appreciated

[imangohari1]

Hi,
I'm having the following ReST message:

HTTP/1.1 200 OK
Date: Mon, 06 Aug 2018 15:32:21 GMT
Content-Length: 90
Content-Type: text/plain; charset=utf-8

{"responseCode":0,"responseMsg":"Initiated","userId":4,"stackId":1,"stackResponseCode":0}

and I'm trying to use the extact_binds to get the value of stackId:

- test:
   - group: "CMT Test"
   - name: "Stack Creation"
   - url: "XXX"
   - method: 'POST'
   - body: 'XXXX'
   - expected_status: [200]
   - headers: {'Content-Type': 'text/plain'}
   - extract_binds:
       - 'id': {'raw_body': 'stackId'}
   - validators:
       - extract_test: {raw_body: "stackId",  test: "exists"}
       - compare: {raw_body: "stackId", comparator: contains , expected: '$id'}

Unfortunately I'm facing the following error:

ERROR:Test Failure, failure type: Validator Failed, Reason: Comparison failed, evaluating contains({"responseCode":0,"responseMsg":"Initiated","userId":4,"stackId":26,"stackResponseCode":0}
, $id) returned False

any help is appreciated!

[imangohari1]

For anyone who is having this issue, please take a look at
~/pyresttest/examples/miniapp-extract-validate.yaml