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CODITECT Pattern Library: Test-Driven Development Specification

Version: 1.0
Purpose: Automated testing framework for design patterns

Testing Philosophy​

Test-Driven Design: Every pattern has:

  1. Visual Tests - Appearance matches specification
  2. Functional Tests - Interactions work correctly
  3. Accessibility Tests - WCAG 2.1 AA compliance
  4. Integration Tests - Patterns compose properly

Test Suite Structure​

tests/
├── unit/
│   ├── atoms/
│   │   ├── button.test.js
│   │   ├── input.test.js
│   │   └── ...
│   ├── molecules/
│   └── organisms/
├── integration/
│   ├── dashboard.test.js
│   ├── detail-view.test.js
│   └── ...
├── visual/
│   ├── snapshots/
│   └── regression.test.js
└── accessibility/
    └── a11y.test.js

ATOM TESTS​

Button Test Suite​

import { test, expect } from '@playwright/test';
import { checkA11y, injectAxe } from 'axe-playwright';

describe('Button Atom', () => {
  describe('Visual Requirements', () => {
    test('primary button has correct styles', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-primary"]');
      
      // Height
      await expect(btn).toHaveCSS('height', '40px');
      
      // Border radius
      await expect(btn).toHaveCSS('border-radius', '6px');
      
      // Font weight
      await expect(btn).toHaveCSS('font-weight', '500');
      
      // Background color
      await expect(btn).toHaveCSS('background-color', 'rgb(59, 130, 246)');
    });
    
    test('button has minimum touch target size', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-primary"]');
      const box = await btn.boundingBox();
      
      expect(box.height).toBeGreaterThanOrEqual(44);
      expect(box.width).toBeGreaterThanOrEqual(44);
    });
    
    test('visual regression: button states', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-primary"]');
      
      // Default state
      await expect(btn).toHaveScreenshot('button-default.png');
      
      // Hover state
      await btn.hover();
      await expect(btn).toHaveScreenshot('button-hover.png');
      
      // Focus state
      await btn.focus();
      await expect(btn).toHaveScreenshot('button-focus.png');
      
      // Disabled state
      await page.goto('/components/atoms/button?state=disabled');
      const btnDisabled = page.locator('[data-testid="btn-disabled"]');
      await expect(btnDisabled).toHaveScreenshot('button-disabled.png');
    });
  });
  
  describe('Functional Requirements', () => {
    test('button is clickable', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-primary"]');
      
      let clicked = false;
      await page.exposeFunction('handleClick', () => { clicked = true; });
      await page.evaluate(() => {
        document.querySelector('[data-testid="btn-primary"]')
          .addEventListener('click', () => window.handleClick());
      });
      
      await btn.click();
      expect(clicked).toBe(true);
    });
    
    test('disabled button is not clickable', async ({ page }) => {
      await page.goto('/components/atoms/button?state=disabled');
      const btn = page.locator('[data-testid="btn-disabled"]');
      
      let clicked = false;
      await page.exposeFunction('handleClick', () => { clicked = true; });
      await page.evaluate(() => {
        document.querySelector('[data-testid="btn-disabled"]')
          .addEventListener('click', () => window.handleClick());
      });
      
      await btn.click({ force: true });
      expect(clicked).toBe(false);
    });
    
    test('button shows loading state', async ({ page }) => {
      await page.goto('/components/atoms/button?state=loading');
      const btn = page.locator('[data-testid="btn-loading"]');
      
      // Spinner present
      const spinner = btn.locator('.spinner');
      await expect(spinner).toBeVisible();
      
      // Button disabled
      await expect(btn).toBeDisabled();
    });
  });
  
  describe('Accessibility Requirements', () => {
    test('button is keyboard accessible', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-primary"]');
      
      // Focus with Tab
      await page.keyboard.press('Tab');
      await expect(btn).toBeFocused();
      
      // Activate with Enter
      let activated = false;
      await page.exposeFunction('handleActivate', () => { activated = true; });
      await page.evaluate(() => {
        document.querySelector('[data-testid="btn-primary"]')
          .addEventListener('click', () => window.handleActivate());
      });
      
      await page.keyboard.press('Enter');
      expect(activated).toBe(true);
    });
    
    test('button has visible focus indicator', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-primary"]');
      
      await btn.focus();
      
      // Check for outline or box-shadow
      const outline = await btn.evaluate(el => 
        getComputedStyle(el).outline
      );
      const boxShadow = await btn.evaluate(el =>
        getComputedStyle(el).boxShadow
      );
      
      expect(outline !== 'none' || boxShadow !== 'none').toBe(true);
    });
    
    test('icon button has aria-label', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-icon"]');
      
      const ariaLabel = await btn.getAttribute('aria-label');
      expect(ariaLabel).toBeTruthy();
      expect(ariaLabel.length).toBeGreaterThan(0);
    });
    
    test('button passes accessibility audit', async ({ page }) => {
      await page.goto('/components/atoms/button');
      await injectAxe(page);
      
      const results = await checkA11y(page, '[data-testid="btn-primary"]', {
        detailedReport: true
      });
      
      expect(results.violations).toHaveLength(0);
    });
    
    test('button meets color contrast requirements', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-primary"]');
      
      const bgColor = await btn.evaluate(el =>
        getComputedStyle(el).backgroundColor
      );
      const color = await btn.evaluate(el =>
        getComputedStyle(el).color
      );
      
      const contrast = calculateContrast(bgColor, color);
      expect(contrast).toBeGreaterThanOrEqual(4.5);
    });
  });
  
  describe('Responsive Behavior', () => {
    test('button adapts to viewport size', async ({ page }) => {
      await page.goto('/components/atoms/button');
      const btn = page.locator('[data-testid="btn-primary"]');
      
      // Desktop
      await page.setViewportSize({ width: 1440, height: 900 });
      const desktopWidth = await btn.evaluate(el => el.offsetWidth);
      
      // Mobile
      await page.setViewportSize({ width: 375, height: 667 });
      const mobileWidth = await btn.evaluate(el => el.offsetWidth);
      
      // Button doesn't break layout
      expect(mobileWidth).toBeLessThanOrEqual(375);
      expect(mobileWidth).toBeGreaterThan(0);
    });
  });
});

// Helper function
function calculateContrast(rgb1, rgb2) {
  const l1 = relativeLuminance(rgb1);
  const l2 = relativeLuminance(rgb2);
  const lighter = Math.max(l1, l2);
  const darker = Math.min(l1, l2);
  return (lighter + 0.05) / (darker + 0.05);
}

function relativeLuminance(rgb) {
  const [r, g, b] = rgb.match(/\d+/g).map(n => {
    const val = n / 255;
    return val <= 0.03928 ? val / 12.92 : Math.pow((val + 0.055) / 1.055, 2.4);
  });
  return 0.2126 * r + 0.7152 * g + 0.0722 * b;
}

MOLECULE TESTS​

Status Indicator Test Suite​

describe('Status Indicator Molecule', () => {
  describe('Composition Tests', () => {
    test('contains required atoms', async ({ page }) => {
      await page.goto('/components/molecules/status-indicator');
      const indicator = page.locator('[data-testid="status-indicator"]');
      
      // Contains status dot
      const dot = indicator.locator('.status-dot');
      await expect(dot).toBeVisible();
      
      // Contains label
      const label = indicator.locator('.status-label');
      await expect(label).toBeVisible();
    });
    
    test('atoms are properly aligned', async ({ page }) => {
      await page.goto('/components/molecules/status-indicator');
      const indicator = page.locator('[data-testid="status-indicator"]');
      
      const display = await indicator.evaluate(el =>
        getComputedStyle(el).display
      );
      expect(display).toBe('inline-flex');
      
      const alignItems = await indicator.evaluate(el =>
        getComputedStyle(el).alignItems
      );
      expect(alignItems).toBe('center');
    });
    
    test('has correct spacing between atoms', async ({ page }) => {
      await page.goto('/components/molecules/status-indicator');
      const indicator = page.locator('[data-testid="status-indicator"]');
      
      const gap = await indicator.evaluate(el =>
        getComputedStyle(el).gap
      );
      expect(gap).toBe('8px');
    });
  });
  
  describe('Semantic Consistency', () => {
    test('color matches semantic meaning', async ({ page }) => {
      await page.goto('/components/molecules/status-indicator');
      
      // Success = green
      const success = page.locator('[data-testid="status-success"]');
      const successDot = success.locator('.status-dot');
      const successBg = await successDot.evaluate(el =>
        getComputedStyle(el).backgroundColor
      );
      expect(successBg).toBe('rgb(16, 185, 129)'); // --green-500
      
      // Warning = yellow
      const warning = page.locator('[data-testid="status-warning"]');
      const warningDot = warning.locator('.status-dot');
      const warningBg = await warningDot.evaluate(el =>
        getComputedStyle(el).backgroundColor
      );
      expect(warningBg).toBe('rgb(245, 158, 11)'); // --yellow-500
    });
  });
  
  describe('Accessibility', () => {
    test('screenreader reads both dot and text', async ({ page }) => {
      await page.goto('/components/molecules/status-indicator');
      const indicator = page.locator('[data-testid="status-indicator"]');
      
      const text = await indicator.textContent();
      expect(text).toContain('Active');
      
      // Dot has role
      const dot = indicator.locator('.status-dot');
      const role = await dot.getAttribute('role');
      expect(role).toBe('img');
    });
  });
});

ORGANISM TESTS​

Card Test Suite​

describe('Card Organism', () => {
  describe('Structure Tests', () => {
    test('card has semantic HTML', async ({ page }) => {
      await page.goto('/components/organisms/card');
      const card = page.locator('[data-testid="card"]');
      
      // Should be article or section
      const tagName = await card.evaluate(el => el.tagName.toLowerCase());
      expect(['article', 'section']).toContain(tagName);
    });
    
    test('card has proper heading hierarchy', async ({ page }) => {
      await page.goto('/components/organisms/card');
      const card = page.locator('[data-testid="card"]');
      
      // Has h3 (assuming card in h2 section)
      const heading = card.locator('h3');
      await expect(heading).toBeVisible();
    });
  });
  
  describe('Interaction Tests', () => {
    test('clickable card responds to click', async ({ page }) => {
      await page.goto('/components/organisms/card?clickable=true');
      const card = page.locator('[data-testid="card-clickable"]');
      
      let clicked = false;
      await page.exposeFunction('handleCardClick', () => { clicked = true; });
      await page.evaluate(() => {
        document.querySelector('[data-testid="card-clickable"]')
          .addEventListener('click', () => window.handleCardClick());
      });
      
      await card.click();
      expect(clicked).toBe(true);
    });
    
    test('card shows hover state', async ({ page }) => {
      await page.goto('/components/organisms/card');
      const card = page.locator('[data-testid="card"]');
      
      // Get initial shadow
      const initialShadow = await card.evaluate(el =>
        getComputedStyle(el).boxShadow
      );
      
      // Hover
      await card.hover();
      
      // Get hover shadow
      const hoverShadow = await card.evaluate(el =>
        getComputedStyle(el).boxShadow
      );
      
      // Shadow should change
      expect(hoverShadow).not.toBe(initialShadow);
    });
  });
  
  describe('Content Tests', () => {
    test('card renders all sections', async ({ page }) => {
      await page.goto('/components/organisms/card');
      const card = page.locator('[data-testid="card"]');
      
      // Header
      const header = card.locator('.card-header');
      await expect(header).toBeVisible();
      
      // Content
      const content = card.locator('.card-content');
      await expect(content).toBeVisible();
      
      // Footer
      const footer = card.locator('.card-footer');
      await expect(footer).toBeVisible();
    });
    
    test('card molecules are properly composed', async ({ page }) => {
      await page.goto('/components/organisms/card');
      const card = page.locator('[data-testid="card"]');
      
      // Status indicator molecule
      const statusIndicator = card.locator('.status-indicator');
      await expect(statusIndicator).toBeVisible();
      
      // Progress indicator molecule
      const progressIndicator = card.locator('.progress-indicator');
      await expect(progressIndicator).toBeVisible();
    });
  });
});

INTEGRATION TESTS​

Dashboard Page Test Suite​

describe('Dashboard Integration', () => {
  test('page loads with all organisms', async ({ page }) => {
    await page.goto('/dashboard');
    
    // Navbar present
    const navbar = page.locator('[data-testid="navbar"]');
    await expect(navbar).toBeVisible();
    
    // Page header present
    const header = page.locator('.page-header');
    await expect(header).toBeVisible();
    
    // Card grid present
    const grid = page.locator('.card-grid');
    await expect(grid).toBeVisible();
    
    // Cards present
    const cards = page.locator('.card');
    const count = await cards.count();
    expect(count).toBeGreaterThan(0);
  });
  
  test('user can navigate from dashboard to detail', async ({ page }) => {
    await page.goto('/dashboard');
    
    // Click first card
    const firstCard = page.locator('.card').first();
    await firstCard.click();
    
    // Should navigate to detail view
    await page.waitForURL(/.*\/projects\/\d+/);
    
    // Detail view loaded
    const detailView = page.locator('.detail-layout');
    await expect(detailView).toBeVisible();
  });
  
  test('patterns compose correctly', async ({ page }) => {
    await page.goto('/dashboard');
    
    // Card contains proper molecule hierarchy
    const card = page.locator('.card').first();
    
    // Status indicator in card header
    const statusInHeader = card.locator('.card-header .status-indicator');
    await expect(statusInHeader).toBeVisible();
    
    // Progress indicator in card footer
    const progressInFooter = card.locator('.card-footer .progress-indicator');
    await expect(progressInFooter).toBeVisible();
  });
  
  test('page is responsive', async ({ page }) => {
    await page.goto('/dashboard');
    
    // Desktop: 4 column grid
    await page.setViewportSize({ width: 1440, height: 900 });
    const desktopGrid = page.locator('.card-grid');
    const desktopColumns = await desktopGrid.evaluate(el =>
      getComputedStyle(el).gridTemplateColumns.split(' ').length
    );
    expect(desktopColumns).toBeGreaterThanOrEqual(3);
    
    // Mobile: 1 column
    await page.setViewportSize({ width: 375, height: 667 });
    const mobileColumns = await desktopGrid.evaluate(el =>
      getComputedStyle(el).gridTemplateColumns.split(' ').length
    );
    expect(mobileColumns).toBe(1);
  });
  
  test('loading states work', async ({ page }) => {
    // Mock slow API
    await page.route('**/api/projects', route => {
      setTimeout(() => route.fulfill({ body: '[]' }), 2000);
    });
    
    await page.goto('/dashboard');
    
    // Skeleton cards visible
    const skeletons = page.locator('.skeleton-card');
    await expect(skeletons.first()).toBeVisible();
    
    // Wait for loading
    await page.waitForTimeout(2500);
    
    // Real content visible
    const cards = page.locator('.card');
    await expect(cards.first()).toBeVisible();
  });
});

ACCESSIBILITY TEST SUITE​

Comprehensive A11y Tests​

import { injectAxe, checkA11y } from 'axe-playwright';

describe('Accessibility Compliance', () => {
  test('entire dashboard passes WCAG 2.1 AA', async ({ page }) => {
    await page.goto('/dashboard');
    await injectAxe(page);
    
    const results = await checkA11y(page, null, {
      detailedReport: true,
      detailedReportOptions: { html: true }
    });
    
    expect(results.violations).toHaveLength(0);
  });
  
  test('keyboard navigation works throughout page', async ({ page }) => {
    await page.goto('/dashboard');
    
    // Tab through all focusable elements
    const focusable = await page.locator(
      'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
    );
    const count = await focusable.count();
    
    for (let i = 0; i < count; i++) {
      await page.keyboard.press('Tab');
      const focused = await page.evaluate(() => document.activeElement.tagName);
      expect(focused).toBeTruthy();
    }
  });
  
  test('screen reader landmarks present', async ({ page }) => {
    await page.goto('/dashboard');
    
    // Main navigation
    const nav = page.locator('nav[role="navigation"]');
    await expect(nav).toBeVisible();
    
    // Main content
    const main = page.locator('main');
    await expect(main).toBeVisible();
    
    // Landmarks have labels
    const navLabel = await nav.getAttribute('aria-label');
    expect(navLabel).toBeTruthy();
  });
  
  test('heading hierarchy is correct', async ({ page }) => {
    await page.goto('/dashboard');
    
    // Get all headings
    const headings = await page.locator('h1, h2, h3, h4, h5, h6').all();
    const levels = await Promise.all(
      headings.map(h => h.evaluate(el => parseInt(el.tagName[1])))
    );
    
    // Should start with h1
    expect(levels[0]).toBe(1);
    
    // No skipped levels
    for (let i = 1; i < levels.length; i++) {
      const diff = levels[i] - levels[i - 1];
      expect(diff).toBeLessThanOrEqual(1);
    }
  });
  
  test('images have alt text', async ({ page }) => {
    await page.goto('/dashboard');
    
    const images = await page.locator('img').all();
    for (const img of images) {
      const alt = await img.getAttribute('alt');
      expect(alt).not.toBeNull();
    }
  });
  
  test('form fields have labels', async ({ page }) => {
    await page.goto('/form');
    
    const inputs = await page.locator('input, select, textarea').all();
    for (const input of inputs) {
      const id = await input.getAttribute('id');
      const ariaLabel = await input.getAttribute('aria-label');
      const ariaLabelledby = await input.getAttribute('aria-labelledby');
      
      if (id) {
        const label = page.locator(`label[for="${id}"]`);
        const hasLabel = await label.count() > 0;
        expect(hasLabel || ariaLabel || ariaLabelledby).toBe(true);
      } else {
        expect(ariaLabel || ariaLabelledby).toBeTruthy();
      }
    }
  });
  
  test('color is not the only visual means', async ({ page }) => {
    await page.goto('/dashboard');
    
    // Status indicators have both color AND text/icon
    const statusIndicators = await page.locator('.status-indicator').all();
    for (const indicator of statusIndicators) {
      const text = await indicator.textContent();
      expect(text.trim().length).toBeGreaterThan(0);
    }
  });
});

VISUAL REGRESSION TEST SUITE​

Automated Screenshot Comparison​

import { test, expect } from '@playwright/test';

describe('Visual Regression', () => {
  const viewports = [
    { name: 'mobile', width: 375, height: 667 },
    { name: 'tablet', width: 768, height: 1024 },
    { name: 'desktop', width: 1440, height: 900 }
  ];
  
  for (const viewport of viewports) {
    test(`dashboard ${viewport.name}`, async ({ page }) => {
      await page.setViewportSize(viewport);
      await page.goto('/dashboard');
      await page.waitForLoadState('networkidle');
      
      await expect(page).toHaveScreenshot(`dashboard-${viewport.name}.png`, {
        fullPage: true,
        maxDiffPixelRatio: 0.01
      });
    });
  }
  
  test('component states', async ({ page }) => {
    await page.goto('/components');
    
    // Button states
    const btnPrimary = page.locator('[data-testid="btn-primary"]');
    await expect(btnPrimary).toHaveScreenshot('btn-primary-default.png');
    
    await btnPrimary.hover();
    await expect(btnPrimary).toHaveScreenshot('btn-primary-hover.png');
    
    await btnPrimary.focus();
    await expect(btnPrimary).toHaveScreenshot('btn-primary-focus.png');
    
    // Input states
    const input = page.locator('[data-testid="input-text"]');
    await expect(input).toHaveScreenshot('input-default.png');
    
    await input.focus();
    await expect(input).toHaveScreenshot('input-focus.png');
    
    await input.fill('Test value');
    await expect(input).toHaveScreenshot('input-filled.png');
  });
  
  test('dark theme', async ({ page }) => {
    await page.goto('/dashboard');
    await page.evaluate(() => {
      document.documentElement.setAttribute('data-theme', 'dark');
    });
    
    await expect(page).toHaveScreenshot('dashboard-dark.png', {
      fullPage: true
    });
  });
});

PERFORMANCE TEST SUITE​

Loading and Rendering Performance​

describe('Performance', () => {
  test('dashboard loads within 2 seconds', async ({ page }) => {
    const startTime = Date.now();
    await page.goto('/dashboard');
    await page.waitForLoadState('networkidle');
    const loadTime = Date.now() - startTime;
    
    expect(loadTime).toBeLessThan(2000);
  });
  
  test('First Contentful Paint < 1s', async ({ page }) => {
    await page.goto('/dashboard');
    
    const fcp = await page.evaluate(() => {
      const paint = performance.getEntriesByType('paint')
        .find(entry => entry.name === 'first-contentful-paint');
      return paint ? paint.startTime : 0;
    });
    
    expect(fcp).toBeLessThan(1000);
  });
  
  test('Cumulative Layout Shift < 0.1', async ({ page }) => {
    await page.goto('/dashboard');
    await page.waitForLoadState('networkidle');
    
    const cls = await page.evaluate(() => {
      let cls = 0;
      new PerformanceObserver((list) => {
        for (const entry of list.getEntries()) {
          if (!entry.hadRecentInput) {
            cls += entry.value;
          }
        }
      }).observe({ type: 'layout-shift', buffered: true });
      return cls;
    });
    
    expect(cls).toBeLessThan(0.1);
  });
  
  test('card grid renders without jank', async ({ page }) => {
    await page.goto('/dashboard');
    
    const startTime = Date.now();
    await page.waitForSelector('.card-grid .card:nth-child(10)');
    const renderTime = Date.now() - startTime;
    
    expect(renderTime).toBeLessThan(500);
  });
});

TEST AUTOMATION SETUP​

GitHub Actions Workflow​

name: Design Pattern Tests

on:
  push:
    branches: [main, develop]
  pull_request:
    branches: [main]

jobs:
  unit-tests:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
          node-version: '18'
      
      - name: Install dependencies
        run: npm ci
      
      - name: Run unit tests
        run: npm run test:unit
      
      - name: Upload coverage
        uses: codecov/codecov-action@v3
  
  accessibility-tests:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
      
      - name: Install dependencies
        run: npm ci
      
      - name: Install Playwright
        run: npx playwright install --with-deps
      
      - name: Run a11y tests
        run: npm run test:a11y
      
      - name: Upload report
        if: always()
        uses: actions/upload-artifact@v3
        with:
          name: a11y-report
          path: test-results/
  
  visual-regression:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
      
      - name: Install dependencies
        run: npm ci
      
      - name: Install Playwright
        run: npx playwright install --with-deps
      
      - name: Run visual tests
        run: npm run test:visual
      
      - name: Upload screenshots
        if: failure()
        uses: actions/upload-artifact@v3
        with:
          name: screenshot-diffs
          path: test-results/

Package.json Scripts​

{
  "H.P.004-SCRIPTS": {
    "test": "npm run test:unit && npm run test:a11y && npm run test:visual",
    "test:unit": "jest --coverage",
    "test:a11y": "playwright test tests/accessibility/",
    "test:visual": "playwright test tests/visual/",
    "test:integration": "playwright test tests/integration/",
    "test:watch": "jest --watch",
    "test:update-snapshots": "playwright test --update-snapshots"
  }
}

CONTINUOUS QUALITY MONITORING​

Metrics Dashboard​

// Generate test metrics
{
  "coverage": {
    "statements": 95.2,
    "branches": 92.8,
    "functions": 94.1,
    "lines": 95.5
  },
  "accessibility": {
    "violations": 0,
    "warnings": 3,
    "passes": 127
  },
  "visual": {
    "snapshots": 156,
    "updated": 0,
    "failed": 0
  },
  "performance": {
    "avgLoadTime": 1247,
    "fcp": 823,
    "cls": 0.042
  }
}

Quality Gates​

// Enforce minimum standards
const qualityGates = {
  coverage: {
    statements: 90,
    branches: 85,
    functions: 90,
    lines: 90
  },
  accessibility: {
    violations: 0,
    wcagLevel: 'AA'
  },
  performance: {
    loadTime: 2000,
    fcp: 1000,
    cls: 0.1
  },
  visual: {
    maxDiffPixelRatio: 0.01
  }
};

// Check before merge
function passesQualityGates(metrics) {
  return (
    metrics.coverage.statements >= qualityGates.coverage.statements &&
    metrics.accessibility.violations === 0 &&
    metrics.performance.loadTime <= qualityGates.performance.loadTime
  );
}

This testing specification ensures every pattern in the library is production-ready, accessible, and maintainable. Run tests before every commit to maintain quality.