Postman: How to check whether the field is returning null in the Postman automation

Question

I have tried with \"!== null\", but it is returning PASS even when the field is returning 0 or \"\".

Answer 1

try this one:

pm.test("your-value is not null", function () {
var jsonData = pm.response.json();
pm.expect(jsonData.your_value).not.eql(null);
});

Answer 2

You can access response json like :

    var json = JSON.parse(responseBody);
    var yourVAr = json.yourVar
    if(yourVar == null){
        //your var is null here
    }

Answer 3

I have done similar, this is one part of the code and its works well Check this code

var jsonData = JSON.parse(responseBody);

for(i=0; i<jsonData.data.length; i++){
tests["due date is between given date range"] = jsonData.data[i].duedate < environment.Cenddate && jsonData.data[i].duedate > environment.Cstartdate;

tests["response body has department name"] = jsonData.data[i].department.name !== null;

}

Answer 4

This works as of Mar-2019:

pm.test("To Check if Value is Null", function() {
var jsonData = pm.response.json();
pm.expect(jsonData.<yourfield>).not.eq(undefined);
)};