export default function escapeHtml(text) {
  throw new Error('Not implemented');
}

import escapeHtml from './escapeHtml';

describe('escapeHtml', () => {
  test('escapes HTML special characters', () => {
    const input = '<div class="x">Tom & Jerry\'s</div>';
    const out = '&lt;div class=&quot;x&quot;&gt;Tom &amp; Jerry&#39;s&lt;/div&gt;';
    expect(escapeHtml(input)).toBe(out);
  });

  test('leaves safe text unchanged', () => {
    expect(escapeHtml('hello world')).toBe('hello world');
  });

  test('escapes ampersands in existing entities', () => {
    expect(escapeHtml('&lt;script&gt;')).toBe('&amp;lt;script&amp;gt;');
  });
});