Response API comparison - Selective elimination of nodes before doing the compare

Ask the Experts and Postman Tips
1

I’m running a test to compare expected json response with actual json response from the application. As part of the test, I want to remove a node whose values are dynamic. During each iteration, the dynamic content will change and will fail the json compare. I would like to know if we have any method which we can use to do selective comparison.

Below script, compare validates the entire json. But need a method to remove a few of the dynamic nodes before doing the compare.

var accounts = data.accounts;
var expJSON = data.expectedresponse;

//JSON Compare step
pm.test("jsonCompare", function () {
    var jsonData = pm.response.json();
    pm.expect(jsonData).to.eql(expJSON);
});

I can use below approach for testing Block by block, but having 1000’s of nodes to compare, the below approach is not practical.

tests["Validate Question 1"] = jsonData.questions[0].title === "adckddkd";
tests["Validate Question 2"] = jsonData.questions[1].title === "*******";
2

Hey @perinbaraj,

Welcome to the community!! :star2:

Are you able to provide a sample of the 2 different responses that you’re likely to receive?

Just so that people can see which parts of the data are going to be changing.

3

Hi Danny,
Thank you for the response.
Sample:
Data 1:
{
“id”: “abcd4234232242”,
“Example1”: “this is a test”,
“SessionId”: 2d3d3d34342323334,
“questions”: [
{
“id”: “abcd4234232242"”,
"
}
]
}

Data 2:
{
“id”: “abcd4234232243”,
“Example1”: “this is a test”,
“SessionId”: 2d3d3d3434232335,
“questions”: [
{
“id”: “abcd4234232243"”,
"
}
]
}
Consider id and sessionid has dynamic values.

For now the solution i got from another forum:

function convertToObjectWithExcludeKeys(orginalObject, excludeKeys){
var newObj = {};
Object.keys(orginalObject).map(key => {
if(excludeKeys.indexOf(key) < 0){
newObj[key] = orginalObject[key];
}

})
return newObj;

}

var b = {Sample1}
var a = {Sample2};

var excludeKeys = [“Value1”,“Value2”,“Value3”];

//Convert original objects to temporary objects with exclude keys
var tmpA = convertToObjectWithExcludeKeys(a, excludeKeys);
var tmpB = convertToObjectWithExcludeKeys(b, excludeKeys);

console.log(“tmpA”, tmpA);
console.log(“tmpB”, tmpB);

pm.test(‘Equals’, function() {
pm.expect(_.isEqual(tmpA, tmpB)).to.be.true
});