Why Postman supports non-functional testing - Challenge Your Understanding

Challenge - 5 Problems

🧠 Conceptual

intermediate

Why is Postman suitable for non-functional testing?

Which reason best explains why Postman can be used for non-functional testing like performance or security checks?

A Postman is designed exclusively for UI testing, not API testing.

B Postman allows scripting to automate requests and measure response times, enabling performance testing.

C Postman only supports manual testing and cannot automate any tests.

D Postman cannot handle any form of testing beyond simple request sending.

💡 Hint

Think about how Postman can automate and measure API responses.

Postman supports scripting with JavaScript to automate API calls and capture response times, which helps in performance and some security testing.

🧠 Conceptual

intermediate

How does Postman help with security testing?

Which feature of Postman supports security testing of APIs?

A Postman only tests UI elements, not security.

B Postman automatically scans code for vulnerabilities.

C Postman can send requests with different authentication tokens to test access control.

D Postman disables all security features during testing.

💡 Hint

Consider how changing tokens or headers can test API security.

By sending requests with various tokens or missing credentials, Postman helps verify if APIs enforce proper security rules.

❓ Predict Output

advanced

What is the output of this Postman test script?

Given the following Postman test script, what will be the test result shown in Postman?

Postman

pm.test('Response time is less than 200ms', function () {
    pm.expect(pm.response.responseTime).to.be.below(200);
});

A Test passes if response time is under 200 milliseconds, otherwise fails.

B Test always passes regardless of response time.

C Test throws a syntax error due to wrong function name.

D Test fails because responseTime is not a valid property.

💡 Hint

Look at the condition inside pm.expect and what it checks.

The script checks if the response time is below 200ms and passes or fails accordingly.

❓ assertion

advanced

Which assertion correctly checks JSON response size in Postman?

You want to assert that the JSON response array has exactly 5 items. Which Postman test assertion is correct?

A pm.test('Array length is 5', () => { pm.expect(pm.response.json().length).to.eql(5); });

B pm.test('Array length is 5', () => { pm.expect(pm.response.json().size).to.eql(5); });

C pm.test('Array length is 5', () => { pm.expect(pm.response.text().length).to.eql(5); });

D pm.test('Array length is 5', () => { pm.expect(pm.response.json()).to.have.lengthOf(5); });

💡 Hint

Check how to get the length of an array in JavaScript and how Postman expects assertions.

pm.response.json() returns the parsed JSON array; .to.have.lengthOf(5) correctly asserts its length.

❓ framework

expert

How can Postman be integrated into CI/CD pipelines for non-functional testing?

Which approach correctly describes integrating Postman collections into a CI/CD pipeline to automate non-functional tests?

A Use Newman CLI to run Postman collections in the pipeline and collect performance metrics.

B Manually run Postman GUI tests during deployment only.

C Postman cannot be integrated into CI/CD pipelines.

D Use Postman to generate HTML reports but not run tests automatically.

💡 Hint

Think about command-line tools that Postman provides for automation.

Newman is Postman's command-line tool that runs collections and can be scripted in CI/CD pipelines for automated testing.