Top 10 Essential Cypress Questions and Answers for Web Testing

1. What is Cypress?

Answer:
Cypress is an open-source end-to-end testing framework designed for modern web applications. It enables developers to write and run tests directly in the browser, providing fast, reliable, and easy-to-write tests for web applications.

2. How do you install Cypress?

Answer:
To install Cypress, use npm or yarn:

npm install cypress --save-dev
# or
yarn add cypress --dev

3. How do you write a basic test in Cypress?

Answer:

describe('My First Test', () => {
  it('Visits the Kitchen Sink', () => {
    cy.visit('https://example.cypress.io');
    cy.contains('type').click();
    cy.url().should('include', '/commands/actions');
    cy.get('.action-email').type('test@example.com')
      .should('have.value', 'test@example.com');
  });
});

4. How do you run Cypress tests from the command line?

Answer:

npx cypress run

This command runs all Cypress tests headlessly in the Electron browser.

5. How do you handle elements with dynamic IDs in Cypress?

Answer:
Answer:

cy.get('[data-cy=submit-button]').click();

Using custom data attributes like data-cy is a recommended approach to handle dynamic elements.

6. How do you handle network requests in Cypress?

Answer:

cy.intercept('GET', '/api/resource', { fixture: 'resource.json' }).as('getResource');
cy.visit('/');
cy.wait('@getResource').its('response.statusCode').should('eq', 200);

7. How do you set up Cypress to use environment variables?

Answer:
Answer:
In cypress.json:

{
  "env": {
    "apiUrl": "https://api.example.com"
  }
}

In your test:

cy.visit(Cypress.env('apiUrl'));

8. How do you retry assertions in Cypress?

Answer:
Cypress automatically retries assertions until they pass or a timeout is reached. No special configuration is needed:

cy.get('.loading').should('not.exist');
cy.get('.success-message').should('be.visible');

9. How do you handle file uploads in Cypress?

Answer:
Answer:

cy.get('input[type="file"]').attachFile('path/to/file.txt');

You need to install the cypress-file-upload plugin for this:

npm install --save-dev cypress-file-upload

In cypress/support/commands.js:

import 'cypress-file-upload';

10. How do you run Cypress tests in different browsers?

Answer:
Answer:
By default, Cypress supports Chrome, Edge, and Firefox. Use the --browser flag to specify a browser:

npx cypress run --browser firefox