test.js

import assert from 'node:assert/strict'
import test from 'node:test'
import {htmlTags, htmlVoidTags} from './index.js'

test('Main', () => {
  for (const {name, tags} of [
    {name: 'HTML Tags', tags: htmlTags},
    {name: 'HTML Void Tags', tags: htmlVoidTags},
  ]) {
    assert.ok(Array.isArray(tags), `${name} should be an array.`)
    assert.equal(
      new Set(tags).size,
      tags.length,
      `${name} should be an unique list.`,
    )

    for (const tag of tags) {
      assert.ok(
        /^(?:[a-z]+|h[123456])$/.test(tag),
        `Unexpected tag name: '${tag}'.`,
      )
    }
  }
})

test('HTML Tags', () => {
  // W3C https://raw.githubusercontent.com/w3c/elements-of-html/HEAD/elements.json
  assert.ok(htmlTags.includes('frame'))
  // https://html.spec.whatwg.org/multipage/obsolete.html
  assert.ok(htmlTags.includes('center'))
  // http://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements
  assert.ok(htmlTags.includes('content'))
})

test('HTML Void Tags', () => {
  assert.ok(Array.isArray(htmlVoidTags))
  assert.equal(new Set(htmlVoidTags).size, htmlVoidTags.length)
  // https://html.spec.whatwg.org/multipage/parsing.html#serialising-html-fragments
  assert.ok(htmlTags.includes('basefont'))
  assert.ok(htmlVoidTags.includes('img'))

  for (const tag of htmlVoidTags) {
    assert.ok(htmlTags.includes(tag))
    assert.ok(/^[a-z]+$/.test(tag), tag)
  }
})