Response headers in Postman - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the value of the 'Content-Type' header from the response.

Postman

let contentType = pm.response.headers.get('[1]');

Drag options to blanks, or click blank then click option'

AContent-Length

BContent-Type

CDate

DServer

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Content-Length' instead of 'Content-Type'.

Misspelling the header name or missing the hyphen.

The 'Content-Type' header tells us the media type of the response. Using pm.response.headers.get('Content-Type') retrieves its value.

2fill in blank

medium

Complete the code to check if the response headers include 'Cache-Control'.

Postman

let hasCacheControl = pm.response.headers.has('[1]');

Drag options to blanks, or click blank then click option'

AETag

BExpires

CCache-Control

DLast-Modified

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for 'Expires' instead of 'Cache-Control'.

Using lowercase or misspelled header names.

The has() method checks if a header exists. We want to check for 'Cache-Control' exactly.

3fill in blank

hard

Fix the error in the code to correctly assert the 'Server' header value is 'nginx'.

Postman

pm.test('Server header is nginx', function () {
    pm.expect(pm.response.headers.get('[1]')).to.eql('nginx');
});

Drag options to blanks, or click blank then click option'

AServer

Bserver

CSERVER

Dservers

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'server' which may not match the header name.

Using plural 'servers' which is incorrect.

Header names are case-insensitive but Postman expects the exact header name as sent. 'Server' is the correct header name to get.

4fill in blank

hard

Fill both blanks to create a test that asserts the 'Content-Length' header is greater than 100.

Postman

pm.test('Content-Length is greater than 100', function () {
    pm.expect(parseInt(pm.response.headers.get('[1]'))).to.be.[2](100);
});

Drag options to blanks, or click blank then click option'

AContent-Length

Babove

Cbelow

Dequal

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'below' or 'equal' instead of 'above' for the assertion.

Not parsing the header value to an integer before comparing.

We get the 'Content-Length' header and parse it as an integer. Then we assert it is above 100 using to.be.above(100).

5fill in blank

hard

Fill all three blanks to create a test that asserts the 'ETag' header exists and starts with a double quote.

Postman

pm.test('ETag header exists and starts with a quote', function () {
    let etag = pm.response.headers.get('[1]');
    pm.expect(etag).to.not.be.[2];
    pm.expect(etag.startsWith('[3]')).to.be.true;
});

Drag options to blanks, or click blank then click option'

AETag

Bnull

C"

Dundefined

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'undefined' instead of 'null' in the assertion.

Forgetting to check the header exists before calling startsWith.

We get the 'ETag' header, assert it is not null, and check it starts with a double quote character.