Check null value in Postman test cases .not.eql() or .not.equal() are not working

Question

I'm working with a API project and using Postman for testing APIs. I wrote few test cases to check null as follows,

//user id is present
pm.test("user id is present", function() {
    pm.expect(jsonData.data[0].userId).not.eql(null);
});

Also tried with .not.equal() as described in this answer.

//user id is present
pm.test("user id is present", function() {
    pm.expect(jsonData.data[0].userId).not.equal(null);
});

However, this all are getting passed even if the userId is null. Any furhter thought to check null value in Postman test case?

`.to.not.be.null`? https://www.chaijs.com/api/bdd/#method_null But it always says in the docs that this is not recommend... — Danny Dainton, Jan 28 '19 at 10:09
@DannyDainton: Tried `.to.not.be.null` however, no luck so far. Yes, I checked doc already, but then what is alternative? — Divyang Desai, Jan 28 '19 at 10:18
Just trying to find something locally that works. Seems like nothing I've tried (each example I've come across) gives me the result I want. :( This feels like it should be so difficult...but it's proving to be. :( — Danny Dainton, Jan 28 '19 at 10:21

Ângelo Polotto · Accepted Answer · 2019-01-30T12:32:08.357

7

First of all, open the console and run the flowing snippet to check the types:

pm.test("user id is present", function() {
   console.log(typeof jsonData.data[0].userId);
   console.log(typeof jsonData.data[0]);
   console.log(typeof jsonData);
}

If you get undefined for jsonData.data[0].userId, you need change your test to assert null and undefined:

pm.test("user id is present", function() {
   pm.expect(jsonData.data[0].userId).to.exist //check if it is not equal to undefined
   pm.expect(jsonData.data[0].userId).to.not.be.null; //if it is not equal to null
}

edited Jan 30 '19 at 12:32

answered Jan 28 '19 at 15:25

Ângelo Polotto

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Very odd this problem, I made some tests in my postman and worked fine. My version is 6.7.2 – Ângelo Polotto Jan 28 '19 at 16:51
Did you parse your JSON data with JSON.parse? – Ângelo Polotto Jan 28 '19 at 16:59
using `pm.response.json();` – Divyang Desai Jan 28 '19 at 17:02
Try this: pm.expect(jsonData.data[0].userId).to.satisfy(function (userId) { if (userId === null) { return false; } else { return true } }); – Ângelo Polotto Jan 28 '19 at 17:09
Thanks Ângelo, I will surly try this and let you know, see you tomorrow! – Divyang Desai Jan 28 '19 at 17:12
Can you run this snippet and send the result to me? console.log(typeof jsonData.data[0].userId); console.log(typeof jsonData.data[0]); console.log(typeof jsonData); – Ângelo Polotto Jan 29 '19 at 11:56
1

`undefined`, `object`, `object` – Divyang Desai Jan 30 '19 at 06:08
1

Okay, so I have to check with `undefined` instead of null i.e `.not.eql(undefined)` – Divyang Desai Jan 30 '19 at 06:09
1

Exactly! I will change the answer and add all the main points of this discussion. – Ângelo Polotto Jan 30 '19 at 12:19

Check null value in Postman test cases .not.eql() or .not.equal() are not working

1 Answers1