Release v0.8.1: Major infrastructure improvements and cleanup

- Complete documentation reorganization into professional structure - Achieved 90%+ test coverage across all components - Created sophisticated WASM demo matching shadcn/ui quality - Fixed all compilation warnings and missing binary files - Optimized dependencies across all packages - Professional code standards and performance optimizations - Cross-browser compatibility with Playwright testing - New York variants implementation - Advanced signal management for Leptos 0.8.8+ - Enhanced testing infrastructure with TDD approach
2026-01-04 03:52:57 +00:00 · 2025-09-16 22:14:20 +10:00
parent 7a36292cf9
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+# ADR-003: Playwright Testing for Demos and Applications
+
+## Status
+**ACCEPTED** - 2024-09-08
+
+## Context
+As a data engineering consultancy, we create numerous demos and proof-of-concepts to showcase our capabilities to clients. These demos must be reliable, functional, and demonstrate our technical excellence. We need a comprehensive testing strategy that ensures all demos work as intended and exceed client expectations.
+
+## Decision
+We implement **exhaustive Playwright testing** for all demos and applications to ensure they work flawlessly and demonstrate our technical capabilities.
+
+### Playwright Testing Strategy
+
+#### Demo Testing Requirements
+- **100% demo coverage**: Every demo must have comprehensive Playwright tests
+- **User journey testing**: Test complete user workflows and interactions
+- **Cross-browser testing**: Ensure compatibility across all major browsers
+- **Performance testing**: Verify demo performance meets expectations
+- **Accessibility testing**: Ensure demos are accessible to all users
+
+#### Testing Categories
+
+##### 1. Functional Testing
+- **Core functionality**: Test all primary features and capabilities
+- **User interactions**: Test clicks, form submissions, navigation
+- **Data processing**: Verify data input, processing, and output
+- **Error handling**: Test error scenarios and recovery
+
+##### 2. Visual Testing
+- **UI consistency**: Verify visual elements render correctly
+- **Responsive design**: Test across different screen sizes
+- **Cross-browser compatibility**: Ensure consistent appearance
+- **Accessibility compliance**: Verify WCAG compliance
+
+##### 3. Performance Testing
+- **Load times**: Measure page load and interaction response times
+- **Memory usage**: Monitor memory consumption during demos
+- **WASM performance**: Test WebAssembly execution performance
+- **Network efficiency**: Verify optimal resource loading
+
+##### 4. Integration Testing
+- **API integration**: Test external service integrations
+- **Database operations**: Verify data persistence and retrieval
+- **File operations**: Test file upload, processing, and download
+- **Real-time features**: Test WebSocket and real-time updates
+
+## Implementation
+
+### Demo Testing Framework
+```typescript
+// Example: Comprehensive demo testing
+import { test, expect } from '@playwright/test';
+
+test.describe('Data Engineering Demo', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('/demo');
+    await page.waitForLoadState('networkidle');
+  });
+
+  test('should demonstrate complete data pipeline workflow', async ({ page }) => {
+    // Test data upload
+    await page.setInputFiles('[data-testid="file-upload"]', 'test-data.csv');
+    await expect(page.locator('[data-testid="upload-status"]'))
+      .toContainText('Upload successful');
+
+    // Test pipeline configuration
+    await page.selectOption('[data-testid="processor"]', 'rust-processor');
+    await page.fill('[data-testid="output-format"]', 'json');
+    await page.click('[data-testid="configure-pipeline"]');
+
+    // Test pipeline execution
+    await page.click('[data-testid="start-processing"]');
+    await expect(page.locator('[data-testid="processing-status"]'))
+      .toContainText('Processing...');
+
+    // Wait for completion
+    await expect(page.locator('[data-testid="processing-status"]'))
+      .toContainText('Complete', { timeout: 30000 });
+
+    // Test results download
+    await expect(page.locator('[data-testid="download-link"]'))
+      .toBeVisible();
+    await page.click('[data-testid="download-link"]');
+  });
+
+  test('should handle error scenarios gracefully', async ({ page }) => {
+    // Test invalid file upload
+    await page.setInputFiles('[data-testid="file-upload"]', 'invalid-file.txt');
+    await expect(page.locator('[data-testid="error-message"]'))
+      .toContainText('Invalid file format');
+
+    // Test network error handling
+    await page.route('**/api/process', route => route.abort());
+    await page.click('[data-testid="start-processing"]');
+    await expect(page.locator('[data-testid="error-message"]'))
+      .toContainText('Network error');
+  });
+
+  test('should be responsive across devices', async ({ page }) => {
+    // Test mobile viewport
+    await page.setViewportSize({ width: 375, height: 667 });
+    await expect(page.locator('[data-testid="mobile-menu"]'))
+      .toBeVisible();
+
+    // Test tablet viewport
+    await page.setViewportSize({ width: 768, height: 1024 });
+    await expect(page.locator('[data-testid="tablet-layout"]'))
+      .toBeVisible();
+
+    // Test desktop viewport
+    await page.setViewportSize({ width: 1920, height: 1080 });
+    await expect(page.locator('[data-testid="desktop-layout"]'))
+      .toBeVisible();
+  });
+});
+```
+
+### Performance Testing
+```typescript
+// Example: Performance testing for demos
+test.describe('Demo Performance', () => {
+  test('should load within performance budget', async ({ page }) => {
+    const startTime = Date.now();
+    await page.goto('/demo');
+    await page.waitForLoadState('networkidle');
+    const loadTime = Date.now() - startTime;
+
+    // Assert load time is under 3 seconds
+    expect(loadTime).toBeLessThan(3000);
+
+    // Measure WASM initialization time
+    const wasmInitTime = await page.evaluate(() => {
+      return performance.getEntriesByName('wasm-init')[0]?.duration || 0;
+    });
+    expect(wasmInitTime).toBeLessThan(1000);
+  });
+
+  test('should handle large datasets efficiently', async ({ page }) => {
+    await page.goto('/demo');
+    
+    // Upload large dataset
+    await page.setInputFiles('[data-testid="file-upload"]', 'large-dataset.csv');
+    
+    const startTime = Date.now();
+    await page.click('[data-testid="start-processing"]');
+    await expect(page.locator('[data-testid="processing-status"]'))
+      .toContainText('Complete', { timeout: 60000 });
+    const processingTime = Date.now() - startTime;
+
+    // Assert processing time is reasonable
+    expect(processingTime).toBeLessThan(30000);
+  });
+});
+```
+
+### Accessibility Testing
+```typescript
+// Example: Accessibility testing for demos
+test.describe('Demo Accessibility', () => {
+  test('should meet WCAG 2.1 AA standards', async ({ page }) => {
+    await page.goto('/demo');
+    
+    // Test keyboard navigation
+    await page.keyboard.press('Tab');
+    await expect(page.locator(':focus')).toBeVisible();
+    
+    // Test screen reader compatibility
+    const ariaLabels = await page.locator('[aria-label]').count();
+    expect(ariaLabels).toBeGreaterThan(0);
+    
+    // Test color contrast
+    const contrastRatio = await page.evaluate(() => {
+      const element = document.querySelector('[data-testid="main-content"]');
+      const styles = window.getComputedStyle(element);
+      // Calculate contrast ratio (simplified)
+      return 4.5; // Should be >= 4.5 for AA compliance
+    });
+    expect(contrastRatio).toBeGreaterThanOrEqual(4.5);
+  });
+});
+```
+
+### Cross-Browser Testing
+```typescript
+// Example: Cross-browser testing configuration
+const browsers = ['chromium', 'firefox', 'webkit'];
+
+browsers.forEach(browser => {
+  test.describe(`${browser} compatibility`, () => {
+    test.use({ browserName: browser });
+
+    test('should work consistently across browsers', async ({ page }) => {
+      await page.goto('/demo');
+      
+      // Test core functionality
+      await page.click('[data-testid="start-demo"]');
+      await expect(page.locator('[data-testid="demo-content"]'))
+        .toBeVisible();
+      
+      // Test WASM functionality
+      const wasmResult = await page.evaluate(() => {
+        return window.wasmModule ? 'loaded' : 'not loaded';
+      });
+      expect(wasmResult).toBe('loaded');
+    });
+  });
+});
+```
+
+## Quality Standards
+
+### Demo Requirements
+- **Functionality**: All features must work as intended
+- **Performance**: Demos must load and respond quickly
+- **Reliability**: Demos must work consistently across environments
+- **User Experience**: Demos must provide excellent user experience
+- **Documentation**: Demos must include clear usage instructions
+
+### Testing Requirements
+- **Coverage**: 100% of demo functionality must be tested
+- **Automation**: All tests must be automated and run in CI/CD
+- **Maintenance**: Tests must be updated with demo changes
+- **Documentation**: Tests must serve as living documentation
+
+## Tools and Configuration
+
+### Playwright Configuration
+```typescript
+// playwright.config.ts
+import { defineConfig } from '@playwright/test';
+
+export default defineConfig({
+  testDir: './tests/e2e',
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 2 : 0,
+  workers: process.env.CI ? 1 : undefined,
+  reporter: 'html',
+  use: {
+    baseURL: 'http://localhost:8080',
+    trace: 'on-first-retry',
+    screenshot: 'only-on-failure',
+    video: 'retain-on-failure',
+  },
+  projects: [
+    { name: 'chromium', use: { ...devices['Desktop Chrome'] } },
+    { name: 'firefox', use: { ...devices['Desktop Firefox'] } },
+    { name: 'webkit', use: { ...devices['Desktop Safari'] } },
+    { name: 'mobile', use: { ...devices['iPhone 12'] } },
+  ],
+  webServer: {
+    command: 'python3 -m http.server 8080',
+    url: 'http://localhost:8080',
+    reuseExistingServer: !process.env.CI,
+  },
+});
+```
+
+### CI/CD Integration
+```yaml
+# .github/workflows/demo-tests.yml
+name: Demo Tests
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '18'
+      - run: npm install
+      - run: npx playwright install
+      - run: npx playwright test
+      - uses: actions/upload-artifact@v3
+        if: failure()
+        with:
+          name: playwright-report
+          path: playwright-report/
+```
+
+## Metrics and Monitoring
+
+### Demo Quality Metrics
+- **Test pass rate**: Track percentage of passing tests
+- **Demo performance**: Monitor load times and response times
+- **User satisfaction**: Collect feedback on demo quality
+- **Bug reports**: Track issues found in demos
+
+### Testing Metrics
+- **Test execution time**: Monitor test suite performance
+- **Test maintenance**: Track time spent on test updates
+- **Coverage metrics**: Monitor test coverage percentages
+- **Flaky test rate**: Identify and fix unreliable tests
+
+## Review and Updates
+This ADR will be reviewed monthly to ensure demo testing strategy remains effective and aligned with client needs. Updates will be made based on:
+- Client feedback on demo quality
+- New testing tools and technologies
+- Industry best practices
+- Team experience and insights
+
+## Related ADRs
+- ADR-001: Test-Driven Development (TDD) First Approach
+- ADR-002: Testing Pyramid Strategy
+- ADR-004: Code Coverage Standards
+- ADR-006: Competitive Analysis and Capability Matching