There was an error in evaluating the test script: AssertionError: expected null not to be null, instead of failing test

🙋 Help
1

Hello, I’m currently learning test using Postman and I’m not an expert with Javascript. I am trying to create a function to test, but using it in pm.test throws error instead of failing the test case:

There was an error in evaluating the test script: AssertionError: expected null not to be null

Below is the test that throws AssertionError:

var jsonData = pm.response.json();
var items = jsonData.data.items;

function checkValues(object) {
    for (const value of Object.values(object)) {
        pm.expect(value).to.not.be.null;
    };
};

items.forEach((item) => pm.test("item values are not null", checkValues(item)));

but if I don’t define a separate function, it fails the test as expected:

var jsonData = pm.response.json();
var items = jsonData.data.items;

items.forEach((item) => pm.test("item values are not null", function() {
    for (const value of Object.values(item)) {
        pm.expect(value).to.not.be.null;
    };
}));

Can someone help me and explain what should I do if I need that separate function so that I can reuse it? Thank you.

2

figured it out

var jsonData = pm.response.json();
var items = jsonData.data.items;

function checkValues(object) {
    for (const value of Object.values(object)) {
        pm.expect(value).to.not.be.null;
    };
};

items.forEach((item) => pm.test("item values are not null", function() {
    checkValues(item);
}));