How to compare two json responses and see the differences in Postman? - comparison

Question

I need to create tests in Postman where I compare two responses for two different requests and I want to see what is (if there is anything) the difference between them.
Case is that I can get json response which can contain anything, then I need to check if on different environment the same request gave the same response.
Right now I do it that way:
In first request I save responsee:
pm.globals.set('response', pm.response.json());
In second request I compare response with saved one with:
pm.test('Should have identical responses as previous', () => {
pm.expect(pm.response.json()).to.deep.equal(pm.globals.get('response'));
});
But in this case I just see if there is any difference, so I have to go through a lot of lines each time to find what was wrong.
What I need to get is when I have first response like:
[
{
color: "red",
value: "#f00"
},
{
color: "green",
value: "#0f0"
}
]
And second like:
[
{
color: "red",
value: "#f00"
},
{
color: "green",
value: "#0f2"
}
]
I want to get info in run results like:
there is difference in line: value: "#0f2"
or
in first response there was value: "#0f0" and in second there is value: "#0f2"
Is it even possible to do?

Answer 1

Ok, the solution that I worked with:
In first request I saved response with
pm.globals.set('respa', pm.response.json());
In second I used function to find differences:
function diff(obj1, obj2) {
const result = {};
if (Object.is(obj1, obj2)) {
return undefined;
}
if (!obj2 || typeof obj2 !== 'object') {
return obj2;
}
Object.keys(obj1).concat(Object.keys(obj2)).forEach(key => {
if (obj2[key] !== obj1[key] && !Object.is(obj1[key], obj2[key])) {
result[key] = obj2[key];
}
if (typeof obj2[key] === 'object' && typeof obj1[key] === 'object') {
const value = diff(obj1[key], obj2[key]);
if (value !== undefined) {
result[key] = value;
}
}
});
return result;
}
And then also in second response I've added 'if' which create test when there is a difference in responses, and that test is named as difference, and also it's saved in console as json.
pm.globals.set('respb', pm.response.json());
if (!Object.is(pm.globals.get('respb'), pm.globals.get('respa'))) {
const result = diff(pm.globals.get('respb'), pm.globals.get('res12'));
console.log(result);
pm.test('Difference' + JSON.stringify(result), () => {
pm.expect(0).to.equal(pm.globals.get(1));
});
}