dom-accessibility-api 0.6.3: getRole

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify dom-accessibility-api.getRole in pkg:npm/dom-accessibility-api@0.6.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/dom-accessibility-api@0.6.3
Demonstrate these symbols/APIs:
  - dom-accessibility-api.getRole
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:8b1cdbc3d926eaa3612c7bac566eeeca77b6a48a3659087c6effc9e7438173a2","constraints":{"executionContext":"node"},"contract":["getRole returns implicit ARIA roles for semantic HTML elements including button, navigation, heading, and table","getRole returns link role for anchor elements with href and null when href is absent","getRole resolves specialized roles for input elements based on their type attribute","getRole resolves combobox for standard select and listbox for multiple or sized select","getRole prioritizes explicit role attribute over implicit element role and resolves the first space-separated token","getRole falls back to implicit role when presentation role is overridden by global ARIA attributes"],"goal":"verify dom-accessibility-api.getRole in pkg:npm/dom-accessibility-api@0.6.3","kind":"HOW","packages":["pkg:npm/dom-accessibility-api@0.6.3"],"schemaVersion":1,"symbols":["dom-accessibility-api.getRole"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/dom-accessibility-api@0.6.3"],"schemaVersion":1,"subject":"pkg:npm/dom-accessibility-api@0.6.3","symbols":["dom-accessibility-api.getRole"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-dom-accessibility-api",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-dom-accessibility-api",
      "version": "1.0.0",
      "dependencies": {
        "dom-accessibility-api": "0.6.3"
      }
    },
    "node_modules/dom-accessibility-api": {
      "version": "0.6.3",
      "resolved": "https://registry.npmjs.org/dom-accessibility-api/-/dom-accessibility-api-0.6.3.tgz",
      "integrity": "sha512-7ZgogeTnjuHbo+ct10G9Ffp0mif17idi0IyWNVA/wcwcm7NPOD/WEHVP3n7n3MhXqxoIYm8d6MuZohYWIZ4T3w==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-dom-accessibility-api",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "dom-accessibility-api": "0.6.3"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify dom-accessibility-api.getRole in pkg:npm/dom-accessibility-api@0.6.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/dom-accessibility-api@0.6.3"
  ],
  "symbols": [
    "dom-accessibility-api.getRole"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

import assert from 'node:assert/strict';
import { getRole } from 'dom-accessibility-api';

function createElement(tagName, attrs = {}, props = {}) {
  const attributes = new Map(Object.entries(attrs));
  const el = {
    nodeType: 1,
    ELEMENT_NODE: 1,
    tagName: tagName.toUpperCase(),
    localName: tagName.toLowerCase(),
    getAttribute(name) {
      return attributes.get(name) ?? null;
    },
    hasAttribute(name) {
      return attributes.has(name);
    },
    ...props,
  };
  return el;
}

// 1. getRole returns implicit ARIA roles for semantic HTML elements including button, navigation, heading, and table
{
  const btn = createElement('button');
  assert.equal(getRole(btn), 'button');

  const nav = createElement('nav');
  assert.equal(getRole(nav), 'navigation');

  const h1 = createElement('h1');
  assert.equal(getRole(h1), 'heading');

  const table = createElement('table');
  assert.equal(getRole(table), 'table');
}

// 2. getRole returns link role for anchor elements with href and null when href is absent
{
  const link = createElement('a', { href: 'https://example.com' });
  assert.equal(getRole(link), 'link');

  const anchorNoHref = createElement('a');
  assert.equal(getRole(anchorNoHref), null);
}

// 3. getRole resolves specialized roles for input elements based on their type attribute
{
  const checkbox = createElement('input', { type: 'checkbox' }, { type: 'checkbox' });
  assert.equal(getRole(checkbox), 'checkbox');

  const radio = createElement('input', { type: 'radio' }, { type: 'radio' });
  assert.equal(getRole(radio), 'radio');

  const range = createElement('input', { type: 'range' }, { type: 'range' });
  assert.equal(getRole(range), 'slider');

  const number = createElement('input', { type: 'number' }, { type: 'number' });
  assert.equal(getRole(number), 'spinbutton');

  const text = createElement('input', { type: 'text' }, { type: 'text' });
  assert.equal(getRole(text), 'textbox');

  const textWithList = createElement('input', { type: 'text', list: 'suggestions' }, { type: 'text' });
  assert.equal(getRole(textWithList), 'combobox');
}

// 4. getRole resolves combobox for standard select and listbox for multiple or sized select
{
  const select = createElement('select', {}, { size: 0 });
  assert.equal(getRole(select), 'combobox');

  const selectMulti = createElement('select', { multiple: '' }, { size: 0 });
  assert.equal(getRole(selectMulti), 'listbox');

  const selectSized = createElement('select', {}, { size: 4 });
  assert.equal(getRole(selectSized), 'listbox');
}

// 5. getRole prioritizes explicit role attribute over implicit element role and resolves the first space-separated token
{
  const divTab = createElement('div', { role: 'tab' });
  assert.equal(getRole(divTab), 'tab');

  const btnSwitch = createElement('button', { role: 'switch' });
  assert.equal(getRole(btnSwitch), 'switch');

  const multiRole = createElement('div', { role: 'searchbox textbox' });
  assert.equal(getRole(multiRole), 'searchbox');
}

// 6. getRole falls back to implicit role when presentation role is overridden by global ARIA attributes
{
  const presButton = createElement('button', { role: 'presentation' });
  assert.equal(getRole(presButton), 'presentation');

  const presButtonWithLabel = createElement('button', { role: 'presentation', 'aria-label': 'Action' });
  assert.equal(getRole(presButtonWithLabel), 'button');
}

console.log('All contract assertions passed successfully.');