Rate limit testing in Postman - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the request method to POST in Postman test script.

Postman

pm.request.method = '[1]';

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

AGET

BPUT

CPOST

DDELETE

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing GET instead of POST

Using PUT or DELETE which may not be supported

Setting the method to POST is required to test rate limits on POST endpoints.

2fill in blank

medium

Complete the code to check if the response status code indicates rate limiting (429).

Postman

pm.test('Status code is rate limit', () => {
  pm.response.to.have.status([1]);
});

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

A429

B403

C500

D200

Attempts:

3 left

💡 Hint

Common Mistakes

Using 403 or 500 instead of 429

Checking for 200 which means success

Status code 429 means Too Many Requests, which is used for rate limiting.

3fill in blank

hard

Fix the error in the test script to correctly check the 'Retry-After' header value.

Postman

pm.test('Retry-After header exists', () => {
  pm.expect(pm.response.headers.get('[1]')).to.not.be.undefined;
});

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

Aretry-after

BRetry_After

CretryAfter

DRetry-After

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or camelCase header names

Using underscores instead of hyphens

HTTP headers are case-insensitive but Postman expects the exact header name as sent, usually Retry-After.

4fill in blank

hard

Fill both blanks to create a loop that sends 5 requests and checks for rate limit status.

Postman

for (let i = 0; i [1] 5; i++) {
  pm.sendRequest(pm.request.toObject(), (err, res) => {
    pm.test('Check rate limit', () => {
      pm.expect(res.status).to.equal([2]);
    });
  });
}

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

A<

B429

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= 5 causes 6 iterations

Using == or != in loop condition

The loop should run while i < 5 to send 5 requests (0 to 4). The status to check is 429 for rate limiting.

5fill in blank

hard

Fill all three blanks to extract the rate limit remaining count from headers and assert it is zero.

Postman

pm.test('Rate limit remaining is zero', () => {
  const remaining = parseInt(pm.response.headers.get('[1]'));
  pm.expect(remaining).to.equal([2]);
  pm.expect(typeof remaining).to.equal('[3]');
});

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

AX-RateLimit-Remaining

B0

Cnumber

DRetry-After

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong header name

Comparing to string '0' instead of number 0

Checking type as 'string' instead of 'number'

The header X-RateLimit-Remaining shows how many requests remain. It should be zero after hitting the limit. The type of remaining is number after parsing.