Are there ways to check the structure of JSON response in Postman tests? - automated-tests

Question

I have written several tests in Postman, based on the example snippet codes given in the Postman GUI on Windows desktop.
Mainly, I want to check for existence of the parameters in the response (exact in those cases where I need to check for particular values of the parameters) and I want to know if there's a better way to do it than the way I've been doing now.
The following test shows one such example and this is just a small part of it. The actual response schema is a lot larger so I envisioned writing 50-60 lines of such checks per API endpoint.
pm.test("Det details of a POI", function () {
pm.expect(jsonData.code).to.eql(0);
pm.expect(jsonData.data[0].provider).to.eql("google");
pm.expect(jsonData.data[0]).to.have.property("id");
pm.expect(jsonData.data[0].location).to.have.property("position");
pm.expect(jsonData.data[0].location.address).to.have.property("text");
pm.expect(jsonData.data[0].location.address).to.have.property("house");
pm.expect(jsonData.data[0].location.address).to.have.property("street");
pm.expect(jsonData.data[0].location.address).to.have.property("postalCode");
pm.expect(jsonData.data[0].location.address).to.have.property("city");
pm.expect(jsonData.data[0].location.address).to.have.property("county");
pm.expect(jsonData.data[0].location.address).to.have.property("state");
pm.expect(jsonData.data[0].location.address.country).to.eql("United Kingdom");
pm.expect(jsonData.data[0].location.address).to.have.property("countryCode");
pm.expect(jsonData.data[0].contacts).to.have.property("phone");
pm.expect(jsonData.data[0].contacts.website.value).to.include("www.google.com");
pm.expect(jsonData.data[0].contacts.website).to.have.property("label");
pm.expect(jsonData.data[0].categories[0]).to.have.property("id");
pm.expect(jsonData.data[0].categories[0]).to.have.property("title");
pm.expect(jsonData.data[0].categories[0]).to.have.property("type");
pm.expect(jsonData.data[0].categories[0]).to.have.property("system");
)};
Any tips and improvements would be greatly appreciated.

Answer 1

You're basically asking the same as these two Stack Overflow posts:
Schema validation using Postman
How to validate response in Postman?
Answer: There is a json format validation build into Postman it uses the Tiny Validator project to allow schema validation in post-request test scripts. Research Postman's documentation (1, 2) for examples on how to use it.