Node.js prerequisite in Cypress - Framework Patterns

Framework Mode - Node.js prerequisite

Folder Structure of a Cypress Test Project

  cypress/
  ├── e2e/                 # Test specs (test cases)
  │   ├── login.cy.js      # Example test file
  │   └── dashboard.cy.js  # Another test file
  ├── fixtures/            # Test data files (JSON, etc.)
  │   └── user.json
  ├── support/             # Custom commands and reusable code
  │   ├── commands.js      # Custom Cypress commands
  │   └── e2e.js           # Support file loaded before tests
  ├── videos/              # Videos of test runs (auto-generated)
  ├── screenshots/         # Screenshots on test failures
cypress.config.js          # Main Cypress configuration file
package.json               # Node.js project config and dependencies
  

Test Framework Layers

• Test Specs (cypress/e2e/): Actual test scripts that describe user actions and assertions.
• Fixtures (cypress/fixtures/): Static test data like JSON files to keep tests clean and reusable.
• Support (cypress/support/): Custom commands and reusable helper functions to avoid repeating code.
• Configuration (cypress.config.js): Settings for browsers, base URLs, timeouts, and environment variables.
• Node.js Environment: Cypress runs on Node.js, so Node.js must be installed to run tests and manage dependencies.

Configuration Patterns

Use cypress.config.js to manage settings like:

• Base URL: The website address under test, so tests can use relative paths.
• Environment Variables: Store sensitive info like usernames or API keys securely.
• Test Timeouts: Control how long Cypress waits for elements or commands.

Example snippet from cypress.config.js:

  import { defineConfig } from 'cypress'

  export default defineConfig({
    e2e: {
      baseUrl: 'https://example.com',
      env: {
        username: 'testuser',
        password: 'secret'
      },
      defaultCommandTimeout: 8000
    }
  })
  

Node.js manages these configs and runs Cypress commands via npm or npx.

Test Reporting and CI/CD Integration

• Built-in Reports: Cypress shows test results in the Test Runner UI with clear pass/fail status.
• Video and Screenshots: Automatically records videos and screenshots on failures for easy debugging.
• CI/CD Integration: Use GitHub Actions, Jenkins, or GitLab to run Cypress tests automatically on code changes.
• Custom Reporters: Integrate with tools like Mochawesome for detailed HTML reports.

Example GitHub Actions snippet to run Cypress tests:

  jobs:
    test:
      runs-on: ubuntu-latest
      steps:
        - uses: actions/checkout@v3
        - uses: actions/setup-node@v3
          with:
            node-version: '20'
        - run: npm ci
        - run: npx cypress run
  

Best Practices for Cypress Framework with Node.js

1. Keep Tests Independent: Each test should run alone without relying on others.
2. Use Fixtures for Test Data: Store data separately to keep tests clean and easy to update.
3. Leverage Custom Commands: Put repeated actions in cypress/support/commands.js to avoid duplication.
4. Manage Configurations via cypress.config.js: Centralize environment and browser settings for easy changes.
5. Run Tests in CI/CD: Automate test runs on every code change to catch bugs early.

Self Check Question

Where in this folder structure would you add a new custom command to log in users?

Key Result

A Cypress test framework uses a clear folder structure with Node.js managing dependencies and configurations for reliable automated testing.