Tell me about Postman and how you used it in your projects.

Postman is a tool for API testing that allows creating, sending, and testing HTTP requests.

Used for:

1. Functional API testing:

   • Created request collections for testing various endpoints and their parameters.
   • Used environment variables to manage different configurations (test, staging, production).
   • Checked response statuses (200, 400, 404, etc.) and body structure.
   • Wrote scripts in the "Tests" tab for automatic validation of responses and data.

2. Performance testing (basic):

   • Ran collections repeatedly via Runner to evaluate response speed and identify anomalies.

3. API documentation:

   • Maintained request collections up-to-date, serving as a living documentation.

4. Debugging:

   • Quickly sent requests to reproduce API bugs and verify fixes.

Example test script in Postman:

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

pm.test("Response body contains expected field", function () {
    const responseData = pm.response.json();
    pm.expect(responseData).to.have.property('id');
});

Using integrations with CI/CD systems (e.g., Jenkins, via Newman) for automatic execution of Postman tests as part of the pipeline.