Mock vs stub comparison in Postman - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a mock server in Postman.

Postman

pm.mockServer.create({ url: '[1]' });

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

Ahttps://api.example.com/mock

Bhttps://api.example.com/stub

Chttps://api.example.com/live

Dhttps://api.example.com/test

Attempts:

3 left

💡 Hint

Common Mistakes

Using a live or stub URL instead of a mock URL.

Forgetting to specify the URL in the mock server creation.

The mock server URL should point to the mock endpoint, which is usually different from live or stub URLs.

2fill in blank

medium

Complete the code to stub a response in Postman test script.

Postman

pm.stubResponse({ status: [1] });

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

A302

B404

C500

D200

Attempts:

3 left

💡 Hint

Common Mistakes

Using error status codes like 404 or 500 for a successful stub.

Confusing redirect status 302 with success.

Stubbing a response with status 200 simulates a successful API call.

3fill in blank

hard

Fix the error in the mock server creation code.

Postman

pm.mockServer.create({ url: '[1]' }); // URL must be a string

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

A12345

Bhttps://mock.api.com

Cmock.api.com

D'https://mock.api.com'

Attempts:

3 left

💡 Hint

Common Mistakes

Adding extra quotes inside the string causing syntax errors.

Using numbers or incomplete URLs.

The URL must be a string without extra quotes inside the string literal.

4fill in blank

hard

Fill both blanks to stub a JSON response with status 200.

Postman

pm.stubResponse({ status: [1], body: [2] });

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

A200

B{ "message": "Success" }

C404

D"Error"

Attempts:

3 left

💡 Hint

Common Mistakes

Using error status codes with success messages.

Passing plain strings instead of JSON objects for the body.

Status 200 means success, and the body should be a JSON string representing the response.

5fill in blank

hard

Fill all three blanks to create a mock server, set a stub response, and verify the status code.

Postman

const mock = pm.mockServer.create({ url: '[1]' });
pm.stubResponse({ status: [2] });
pm.test('Status code is [3]', () => {
  pm.expect(pm.response.code).to.eql([2]);
});

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

Ahttps://api.mockserver.com

B200

C200

Dhttps://api.stubserver.com

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing mock and stub URLs.

Using different status codes in stub and test causing assertion failures.

The mock server URL should be the mock URL, the stub response status 200 means success, and the test verifies the status code matches 200.