Do you perform testing of external APIs to ensure that the specification matches reality? Do you create end-to-end scenarios in Postman?

Yes, testing external APIs is an important step to ensure that the actual behavior matches the specifications. I usually use Postman to create end-to-end scenarios that cover key business processes and interactions with the API. This helps identify discrepancies in data formats, logic errors, or authorization issues.

In Postman, you can set up request collections with tests that automatically validate responses, such as status codes, JSON structure, and field values. End-to-end scenarios allow testing the chain of API calls, simulating a real user journey.

An example of a simple test in Postman:

pm.test("Status code is 200", function () {
    pm.response.to.have.status(200);
});

pm.test("Check userId field", function () {
    var jsonData = pm.response.json();
    pm.expect(jsonData.userId).to.eql(123);
});