Accessibility Testing

Accessibility Testing Overview

Accessibility Testing is a building block you will reach for often in design systems. It keeps related logic together and makes your intent obvious to reviewers and future maintainers.

When you learn accessibility testing properly, you avoid the guesswork that leads to bugs and rework. The example below shows the shape you will use in most real design systems projects.

import { LitElement, html, css } from 'lit';

export class DsButton extends LitElement {
  static styles = css`
    button { padding: var(--space-2) var(--space-4); }
  `;
  render() {
    return html`<button part="button"><slot></slot></button>`;
  }
}
customElements.define('ds-button', DsButton);

Web components built with Lit work in any framework and expose CSS parts for controlled styling.

Accessibility Testing Example

/* Tokens flow into components, which flow into products */
:root { --color-brand-500: #2563eb; }
.button { background: var(--color-brand-500); }

• Start from a minimal Accessibility Testing example and grow it only as needed.
• Keep configuration explicit so Accessibility Testing behaves the same in every environment.
• Name things clearly so teammates understand your Accessibility Testing at a glance.
• Add tests around Accessibility Testing early to lock in expected behaviour.

Design System Cheatsheet

Quick reference for accessibility testing within a modern design system.

How Accessibility Testing Fits into a Design System

Accessibility Testing connects the design decisions in your system to the code teams actually ship. When it is defined once and reused, products stay consistent and updates roll out everywhere.

Web components built with Lit work in any framework and expose CSS parts for controlled styling.

• Define it once as a token or shared component.
• Document intended usage with clear examples.
• Make it themeable and accessible by default.
• Version and release changes so consumers can upgrade safely.

Getting Teams to Adopt Accessibility Testing

Adoption is where design systems succeed or stall. Make accessibility testing the easiest option: great docs, sensible defaults, and clear migration paths beat mandates every time.

Common Mistakes

• Skipping error handling and edge cases when wiring up accessibility testing.
• Leaving accessibility testing untested, so regressions slip into production.
• Over-engineering accessibility testing before you actually need the extra flexibility.
• Ignoring documentation, which makes accessibility testing hard for the next developer to change.

Key Takeaways

• Accessibility Testing is a core part of working effectively with design systems.
• Start small and keep accessibility testing focused on a single responsibility.
• Apply consistent patterns so accessibility testing scales across your project.
• Test and document accessibility testing to keep it maintainable over time.