Fixture-based response mocking in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is fixture-based response mocking in Cypress?

It is a way to simulate server responses by using predefined data files called fixtures. This helps test how the app behaves with specific data without needing a real server.

beginner

How do you load a fixture file in a Cypress test?

Use cy.fixture('filename').then((data) => { ... }) to load the fixture data and use it in your test.

beginner

Why use fixture-based mocking instead of real API calls?

It makes tests faster, more reliable, and independent from the server. You control the data, so tests don’t fail because of network or server issues.

intermediate

Which Cypress command is used to intercept a network request and respond with fixture data?

Use cy.intercept('GET', '/api/endpoint', { fixture: 'data.json' }) to mock the response with fixture data.

beginner

What is the folder name where Cypress fixture files are stored by default?

The default folder is cypress/fixtures. Place your JSON or other data files there for easy access.

Which command loads fixture data in Cypress?

A cy.fixture('file.json')

B cy.load('file.json')

C cy.mock('file.json')

D cy.data('file.json')

The correct command to load fixture data is cy.fixture('file.json').

Where should fixture files be placed in a Cypress project?

A cypress/plugins

B cypress/integration

C cypress/support

D cypress/fixtures

Fixture files go inside the cypress/fixtures folder by default.

What does cy.intercept() do when used with a fixture option?

A Intercepts a request and responds with fixture data

B Loads fixture data into the test context

C Saves response data to a fixture file

D Runs the test with fixture data

cy.intercept() can mock network requests by responding with fixture data.

Why is fixture-based mocking useful in tests?

A It slows down tests

B It requires a live server

C It makes tests faster and more stable

D It hides test failures

Fixture mocking avoids real network calls, making tests faster and reliable.

How do you access fixture data inside a .then() callback?

A cy.load('file').then((data) => { use data })

B cy.fixture('file').then((data) => { use data })

C cy.mock('file').then((data) => { use data })

D cy.data('file').then((data) => { use data })

Use cy.fixture('file').then((data) => { ... }) to access fixture data.

Explain how to use fixture-based response mocking in Cypress to test an API call.

Think about intercepting requests and using saved data files.

Describe the benefits of using fixture-based mocking in your tests.

Consider what problems mocking solves.