Postman test - error parsing JSON request with variables

Question

My request body looks like this

"pulic_token" variable is ready defined.

My pre-request test looks like this:

pm.test("Public token is correct", () => {
    const req = JSON.parse(request.data);
    pm.expect(req.public_token).to.be.a("string");
});

The error:

JSONError: Unexpected token 'p' at 4:21 "public_token": {{public_token}} ^

score 0 · Answer 1 · answered Jan 03 '21 at 16:34

0

Every “string” must be quoted with double quote ”

answered Jan 03 '21 at 16:34

Oleg Andreyev

Why does postman assume that my "public_token" is a string? Type confusion is a possible mistake and I'm trying to test that – ericn Jan 03 '21 at 16:44
It has nothing to do with postman, it’s a JSON specification https://www.json.org/json-en.html only numbers, object and arrays can be without quotes – Oleg Andreyev Jan 03 '21 at 17:00

PDHide · Answer 2 · 2021-01-03T18:21:13.230

The error is from

JSON.parse(request.data)

The error says :

JSONError: Unexpected token 'p' at 4:21 "public_token": {{public_token}} ^

THis indicate that public_token variable was not resolved , if it was resolved the error would be something like (assuming value of variable is pet)

JSONError: Unexpected token 'p' at 4:21 "public_token": pet ^

So check whether correct environment or variable is defined

Output:

2 Answers2