API versioning validation in Postman - Test Execution Trace

Test Overview

This test checks if the API correctly handles requests for different versions. It verifies that the response matches the requested API version and returns the expected data format.

Test Code - Postman

Postman

pm.test("API version 1 returns correct response", function () {
    pm.sendRequest({
        url: pm.environment.get("baseUrl") + "/api/v1/resource",
        method: 'GET'
    }, function (err, res) {
        pm.expect(err).to.be.null;
        pm.expect(res).to.have.property('status', 200);
        pm.expect(res.json()).to.have.property('version', '1');
        pm.expect(res.json()).to.have.property('data');
    });
});

pm.test("API version 2 returns correct response", function () {
    pm.sendRequest({
        url: pm.environment.get("baseUrl") + "/api/v2/resource",
        method: 'GET'
    }, function (err, res) {
        pm.expect(err).to.be.null;
        pm.expect(res).to.have.property('status', 200);
        pm.expect(res.json()).to.have.property('version', '2');
        pm.expect(res.json()).to.have.property('data');
        pm.expect(res.json().data).to.have.property('newField');
    });
});

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	Send GET request to /api/v1/resource	API server is running and accessible	Response status code is 200 and version field is '1'	PASS
2	Check response body for version '1' and presence of data field	Response JSON contains version and data fields	version == '1' and data field exists	PASS
3	Send GET request to /api/v2/resource	API server is running and accessible	Response status code is 200 and version field is '2'	PASS
4	Check response body for version '2', data field, and newField inside data	Response JSON contains version, data, and newField fields	version == '2' and data.newField exists	PASS

Failure Scenario

Failing Condition: API returns wrong version or missing expected fields

Execution Trace Quiz - 3 Questions

What does the test verify when sending a request to /api/v1/resource?

A That the response status is 404

B That the response status is 200 and version is '1'

C That the response contains a newField

D That the response is empty

Key Result

Always verify that API versioning returns the correct version and expected data fields to ensure backward compatibility and proper feature support.