Using fixtures in tests in Cypress - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Cypress test using fixture data?

Consider this Cypress test code that loads a fixture and asserts a value.

What will be the test result?

Cypress

describe('User data test', () => {
  it('checks user name from fixture', () => {
    cy.fixture('user').then((user) => {
      expect(user.name).to.equal('Alice');
    });
  });
});

A Test fails because fixture file 'user' is missing

B Test fails because fixture user.name is undefined

C Test passes because fixture user.name equals 'Alice'

D Test fails with a syntax error in the test code

💡 Hint

Check the fixture file content and how cy.fixture loads it asynchronously.

The fixture 'user' contains a JSON object with a 'name' property set to 'Alice'. The test loads it correctly and asserts the name, so it passes.

❓ assertion

intermediate

Which assertion correctly verifies fixture data in Cypress?

You have loaded a fixture 'product' with a price property. Which assertion correctly checks the price is 100?

Cypress

cy.fixture('product').then((product) => {
  // Which assertion is correct here?
});

A expect(product.price).to.equal(100);

B expect(product.price).toBe(100);

C expect(product.price).to.eql('100');

D assert.equal(product.price, '100');

💡 Hint

Cypress uses Chai assertions with expect syntax.

Option A uses Chai's expect syntax correctly with to.equal and a number 100. Option A uses Jest syntax, A uses Node assert with wrong type, D compares number to string.

🔧 Debug

advanced

Why does this Cypress test fail to load fixture data?

Examine this test code snippet:

```js describe('Test', () => { before(() => { cy.fixture('data.json').as('data'); }); it('uses fixture', () => { cy.get('@data').then((data) => { expect(data.id).to.equal(1); }); }); }); ```

Why does this test fail?

Cypress

describe('Test', () => {
  before(() => {
    cy.fixture('data.json').as('data');
  });

  it('uses fixture', () => {
    cy.get('@data').then((data) => {
      expect(data.id).to.equal(1);
    });
  });
});

A cy.get('@data') is incorrect; fixtures should be accessed via 'this.data' in function() style tests.

B Fixture file 'data.json' is missing, causing failure.

C cy.fixture() cannot be used inside before hook.

D The assertion syntax is invalid and causes failure.

💡 Hint

Check how fixture aliases are accessed in Cypress tests.

Fixtures aliased with .as() are accessed via 'this' context in function() style tests, not cy.get('@alias'). Using arrow functions breaks 'this' binding.

🧠 Conceptual

advanced

What is the main benefit of using fixtures in Cypress tests?

Why do testers use fixtures in Cypress testing?

A To replace the need for assertions in tests

B To speed up test execution by caching network requests

C To automatically generate random test data for each run

D To store and reuse static test data separately from test code

💡 Hint

Think about how test data is managed and maintained.

Fixtures allow storing static data in files, making tests cleaner and easier to maintain by separating data from test logic.

❓ framework

expert

How to correctly load multiple fixtures before tests in Cypress?

You want to load two fixtures, 'user.json' and 'settings.json', before all tests and use their data inside tests. Which code snippet correctly does this?

A

before(() => {
  cy.fixture('user').then(user => {
    cy.fixture('settings').then(settings => {
      this.user = user;
      this.settings = settings;
    });
  });
});

it('uses fixtures', () => {
  expect(this.user.name).to.exist;
  expect(this.settings.theme).to.exist;
});

B

before(function() {
  cy.fixture('user').as('user');
  cy.fixture('settings').as('settings');
});

it('uses fixtures', function() {
  expect(this.user.name).to.exist;
  expect(this.settings.theme).to.exist;
});

C

before(() => {
  this.user = cy.fixture('user');
  this.settings = cy.fixture('settings');
});

it('uses fixtures', function() {
  expect(this.user.name).to.exist;
  expect(this.settings.theme).to.exist;
});

D

before(() => {
  cy.readFile('cypress/fixtures/user.json').as('user');
  cy.readFile('cypress/fixtures/settings.json').as('settings');
});

it('uses fixtures', function() {
  expect(this.user.name).to.exist;
  expect(this.settings.theme).to.exist;
});

💡 Hint

Remember how to alias fixtures and access them with function() syntax.

Option B correctly aliases both fixtures in before hook and accesses them via 'this' in function() style test. Option B misuses 'this' inside arrow function. Option B assigns promises to 'this' incorrectly. Option B uses cy.readFile which returns a promise but aliases are not set properly.