Create E2E Testing Infrastructure

[adriandarian]

Create end-to-end testing infrastructure for VS Code extensions and web applications.

Details

Comprehensive E2E testing with real browser/VS Code automation and visual regression testing.

Testing Tools

VS Code Extension Testing

• VS Code test runner
• Extension host automation
• Command palette testing
• Settings manipulation
• Workspace simulation
• Multi-version testing

Web Application Testing

• Playwright (primary)
• Cypress (alternative)
• Selenium (legacy support)
• Mobile device testing
• Cross-browser testing

Visual Regression

• Percy
• Chromatic
• BackstopJS
• Pixel-perfect comparisons

Test Environment

VS Code Test Environment

• Isolated VS Code instance
• Clean user settings
• Test workspace setup
• Extension installation
• Fixture loading
• Snapshot management

Web Test Environment

• Local dev server
• Mock backend services
• Test databases
• Authentication mocking
• Network simulation
• State management

Test Scenarios

VS Code Extension Tests

• Extension activation
• Command execution
• UI interaction
• Configuration changes
• Language feature testing
• Debugging scenarios
• WebView testing

Web Application Tests

• User authentication flow
• Navigation and routing
• Form submissions
• Data persistence
• Error handling
• Responsive design
• Performance

Workflow Integration

• Run E2E tests on PRs (critical path)
• Full E2E suite nightly
• Visual regression on UI changes
• Multi-platform testing
• Record test runs for debugging
• Retry flaky tests
• Parallel test execution

Test Organization

e2e-tests/
  vscode/
    activation.test.ts
    commands.test.ts
    ui.test.ts
  web/
    auth.test.ts
    navigation.test.ts
    forms.test.ts
  visual/
    homepage.test.ts
    dashboard.test.ts
  fixtures/
    workspaces/
    data/
  helpers/
    setup.ts
    teardown.ts

Configuration

e2e:
  vscode:
    versions: ['stable', 'insiders']
    extensions: ['dependency-ext']
    workspace: 'fixtures/test-workspace'
  
  web:
    browsers: ['chromium', 'firefox', 'webkit']
    devices: ['Desktop', 'iPhone 13', 'iPad']
    base_url: 'http://localhost:3000'
  
  visual:
    threshold: 0.1
    enabled_for: ['main', 'production']

Test Data Management

• Seed test databases
• Generate realistic data
• Anonymize production data
• Clean up after tests
• Maintain test fixtures
• Version test data

Debugging Features

• Screenshot on failure
• Video recording
• Console logs capture
• Network request logging
• Trace files
• Debugging mode

Acceptance Criteria

• VS Code extension testing working
• Web application testing working
• Visual regression functional
• Multi-platform tests passing
• Test data management solid
• Debugging features helpful
• CI integration complete
• Documentation comprehensive
• Test reliability >95%
• Adopted by 5+ projects