Stubbing responses in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is stubbing responses in Cypress?

Stubbing responses means replacing real server replies with fake data during tests. It helps test how the app behaves without needing the real server.

beginner

Why use stubbing responses in tests?

To make tests faster, reliable, and independent from real servers. It also helps test edge cases by controlling the response data.

beginner

How do you stub a GET request in Cypress?

Use cy.intercept() with the URL and provide a fake response object. For example: cy.intercept('GET', '/api/data', { fixture: 'data.json' })

intermediate

What is the difference between stubbing and spying in Cypress?

Stubbing changes the response to fake data. Spying only watches the request without changing it.

intermediate

What should you consider when stubbing responses?

Make sure the stub matches the real API shape. Avoid stubbing too much to keep tests realistic. Clean up stubs after tests.

What does cy.intercept() do in Cypress?

A Intercepts and can stub network requests

B Runs the test faster by skipping steps

C Generates random test data

D Clears browser cookies

cy.intercept() lets you watch or replace network requests during tests.

Why stub responses instead of calling the real server?

A To avoid testing UI

B To test without internet connection

C To make tests slower

D To make tests unreliable

Stubbing lets tests run without depending on the real server or internet.

Which command stubs a POST request in Cypress?

A cy.intercept('POST', '/api/save', { statusCode: 200 })

B cy.visit('/api/save')

C cy.stub('POST', '/api/save')

D cy.spy('POST', '/api/save')

cy.intercept() with method POST and a fake response stubs the POST request.

What is a fixture in Cypress stubbing?

A A CSS style

B A browser plugin

C A test runner

D A file with fake data used to stub responses

Fixtures are files that hold fake data to use in stubbing responses.

What happens if you don’t stub a failing server response?

A Test will skip network calls

B Test will always pass

C Test may fail unpredictably

D Test will run faster

Without stubbing, tests depend on real server and may fail if server is down or slow.

Explain how to stub a network response in Cypress and why it is useful.

Think about replacing real server replies with your own data.

Describe the difference between spying and stubbing in Cypress testing.

One observes, the other replaces.