Accessibility Testing Expert

Accessibility Testing Expert (2026 Edition)

English | Bahasa Indonesia

English

Orchestration & Integration

• global-a11y-i18n-expert: Core WCAG rules, ARIA patterns, and internationalization standards.
• e2e-testing-expert: Integrating automated accessibility assertions into Playwright/Vitest CI suites.
• ui-components-expert: Accessible component primitives (Radix UI, Base UI, ARIA patterns).
• visual-qa-vision-agent: Visual audits for focus rings, contrast ratios, and layout flow.

Description

Production guide for automated, semi-automated, and manual web accessibility (a11y) testing. Covers WCAG 2.2 Level AA/AAA compliance validation using @axe-core/playwright, Pa11y, Google Lighthouse CI, screen reader verification (NVDA, VoiceOver), keyboard navigation audits, focus management, and color contrast compliance.

Trigger Conditions

• Running automated accessibility test suites in CI/CD pipelines.
• Auditing web apps for WCAG 2.1 / 2.2 Level AA compliance and legal accessibility requirements (ADA, EAA).
• Debugging keyboard traps, missing ARIA labels, or broken screen reader navigation.
• Writing test cases for focus trapping in modals and custom dialogs.

Core Testing Workflows

1. Automated A11y Testing with Playwright & Axe-Core

import { test, expect } from '@playwright/test';
import AxeBuilder from '@axe-core/playwright';

test.describe('Accessibility Automated Audits', () => {
  test('homepage should have zero critical or serious a11y violations', async ({ page }) => {
    await page.goto('/');

    const accessibilityScanResults = await new AxeBuilder({ page })
      .withTags(['wcag2a', 'wcag2aa', 'wcag22aa'])
      .disableRules(['color-contrast']) // If tested separately
      .analyze();

    expect(accessibilityScanResults.violations).toEqual([]);
  });

  test('modal dialog should trap focus and pass a11y audit', async ({ page }) => {
    await page.goto('/dashboard');
    await page.click('button#open-modal');

    // Verify modal is open and focused
    const modal = page.locator('[role="dialog"]');
    await expect(modal).toBeVisible();

    const modalAudit = await new AxeBuilder({ page })
      .include('[role="dialog"]')
      .analyze();

    expect(modalAudit.violations).toEqual([]);

    // Verify keyboard escape closes modal
    await page.keyboard.press('Escape');
    await expect(modal).toBeHidden();
  });
});

2. Automated Pa11y CI Configuration (.pa11yci.json)

{
  "defaults": {
    "standard": "WCAG2AA",
    "timeout": 15000,
    "runners": ["axe", "htmlcs"],
    "ignore": [
      "WCAG2AA.Principle1.Guideline1_4.1_4_3.G18.Abs"
    ]
  },
  "urls": [
    "http://localhost:3000/",
    "http://localhost:3000/login",
    "http://localhost:3000/pricing",
    "http://localhost:3000/docs"
  ]
}

3. Keyboard & Screen Reader Verification Checklist

• Tab Navigation: All interactive elements (<button>, <a>, <input>) can receive focus in logical reading order.
• Focus Indicators: Visible, high-contrast focus rings (outline: 2px solid var(--focus-color) with outline-offset).
• No Keyboard Traps: Focus can enter and leave components using only Tab, Shift+Tab, and Esc.
• Landmarks: Proper semantic tags (<header>, <nav>, <main>, <footer>, <aside>).
• ARIA Attributes: aria-expanded, aria-controls, aria-haspopup, and aria-live updated dynamically.

Bahasa Indonesia

Integrasi Orkestrasi

• global-a11y-i18n-expert: Pedoman standar WCAG, pola ARIA, dan aksesibilitas internasional.
• e2e-testing-expert: Integrasi pengujian aksesibilitas otomatis ke pipeline Playwright CI.
• ui-components-expert: Validasi aksesibilitas komponen headless dan desain UI.

Deskripsi

Panduan produksi untuk pengujian aksesibilitas web (a11y) otomatis dan manual. Memastikan kepatuhan terhadap standar WCAG 2.2 Level AA/AAA menggunakan @axe-core/playwright, Pa11y, Lighthouse CI, pengujian screen reader, navigasi keyboard, dan kontras warna.

Kondisi Pemicu

• Menjalankan audit aksesibilitas otomatis di pipeline CI/CD.
• Memverifikasi kepatuhan hukum aksesibilitas (WCAG 2.2, ADA, EAA).
• Menguji alur keyboard dan pembaca layar (screen reader) pada komponen kompleks seperti modal dan dropdown.