[SOLVED] Match element not in JSON response

Match element not in JSON response

I would like to check with a Karate API test that the response does not contain an entry with ID 33.

{
"ResultSet Output": [
  {
    "ITEM_DESC": "abc",
    "ITEM_ID": 11,
  },
  {
    "ITEM_DESC": "xyz",
    "ITEM_ID": 47,
  }
],
"StatusCode": 200,
"StatusDescription": ""
}

But the response could also be "empty" like:

{
"ResultSet Output": [],
"StatusCode": 200,
"StatusDescription": ""
}

I tried:

Scenario: not in response
Given path "/api/warehouse/get"
When method Post
Then status 200
* match response not contains deep { "ITEM_ID": '33' }

but this does not work. I need to enshure that "ITEM_ID" is not in the response, OR if it's there, none if it contains 33.

Solution

This can be achieved pretty easily by doing the following

First, extract the results from your response

    * def items = response['ResultSet Output']

Next filter the items aray to find where any item_id is equal to 33

    * def filtered = items.filter(x => x.ITEM_ID == '33')

Finally, use assert to assert that the filtered array contains 0 matches of item_id == 33

    * assert filtered.length == 0

And all together would be

Scenario: not in response
Given path "/api/warehouse/get"
When method Post
Then status 200
* def items = response['ResultSet Output']
* def filtered = items.filter(x => x.ITEM_ID == '33')
* assert filtered.length == 0