cy.fixture() for loading data in Cypress - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Cypress test snippet?

Consider the following Cypress test code that loads a fixture file named user.json and logs the user's name. What will be printed in the test runner console?

Cypress

cy.fixture('user.json').then((user) => {
  cy.log(`User name is: ${user.name}`)
})

A User name is: Alice

B User name is: undefined

C SyntaxError: Unexpected token in fixture file

D Error: Fixture file not found

💡 Hint

Check the content of the fixture file user.json and how cy.fixture() loads it.

The fixture file user.json contains a JSON object with a name property set to "Alice". The cy.fixture() command loads this file asynchronously and passes the parsed object to the then callback. The cy.log() prints the user's name correctly.

❓ assertion

intermediate

Which assertion correctly verifies fixture data in Cypress?

You have loaded a fixture settings.json with cy.fixture('settings.json'). Which assertion correctly checks that the theme property equals dark?

Cypress

cy.fixture('settings.json').then((settings) => {
  // Insert assertion here
})

A expect(settings.theme).to.equal('dark')

B assert.equal(settings['theme'], 'light')

C expect(settings.theme).to.be.undefined

D assert.isTrue(settings.theme === 'light')

💡 Hint

Use the correct expected value and assertion style.

The fixture settings.json has a theme property set to "dark". Option A uses expect with to.equal to check the correct value. Options B and D check for "light" which is incorrect. Option A checks for undefined which is wrong.

🔧 Debug

advanced

Why does this Cypress test fail to load the fixture data?

Given this test code, why does the test fail with Error: Fixture file not found?

Cypress

cy.fixture('nonexistent.json').then((data) => {
  cy.log(data)
})

A The <code>cy.fixture()</code> command requires an absolute path

B The fixture file <code>nonexistent.json</code> does not exist in the fixtures folder

C The <code>then</code> callback is missing a return statement

D The fixture file must be imported with <code>import</code> before use

💡 Hint

Check the file name and location in the Cypress project structure.

The error occurs because the file nonexistent.json is not found in the cypress/fixtures folder. cy.fixture() expects the file to be present there. Options B, C, and D are incorrect because cy.fixture() uses relative paths from the fixtures folder, the callback does not require a return, and no import is needed.

❓ framework

advanced

How to use cy.fixture() with beforeEach to load data once per test?

Which code snippet correctly loads data.json fixture once before each test and makes it available as this.data inside tests?

A

beforeEach(() => {
  cy.fixture('data.json').then((data) => {
    this.data = data
  })
})

B

beforeEach(function() {
  cy.fixture('data.json').then((data) => {
    this.data = data
  })
})

C

beforeEach(function() {
  cy.fixture('data.json').then(function(data) {
    this.data = data
  })
})

D

beforeEach(() => {
  cy.fixture('data.json').then(function(data) {
    this.data = data
  })
})

💡 Hint

Remember how this behaves in arrow functions vs regular functions in JavaScript.

Option C uses regular functions for both beforeEach and the then callback, so this correctly refers to the Mocha context, allowing this.data to be set and accessed in tests. Arrow functions do not bind their own this, so options A, B, and C fail to set this.data properly.

🧠 Conceptual

expert

What is the main advantage of using cy.fixture() in Cypress tests?

Choose the best explanation for why cy.fixture() is used in Cypress testing.

A It speeds up test execution by caching all network requests

B It automatically generates random test data for each test run to increase coverage

C It replaces the need for assertions by validating data automatically

D It allows loading external static data files to use consistent test data across multiple tests

💡 Hint

Think about how test data management helps testing.

cy.fixture() loads static data files (like JSON) so tests can use consistent, reusable data. This helps keep tests clean and maintainable. It does not generate random data (B), replace assertions (C), or cache network requests (D).