import { htmlToText, PARAGRAPH, wordDiff } from '../diff';

describe('wordDiff', () => {
  it('marks what a rewrite kept, added and dropped', () => {
    expect(
      wordDiff('A blue hoodie with a pocket', 'A blue cotton hoodie')
    ).toEqual([
      { type: 'same', text: 'A blue' },
      { type: 'add', text: 'cotton' },
      { type: 'same', text: 'hoodie' },
      { type: 'del', text: 'with a pocket' },
    ]);
  });

  it('reads a reflowed paragraph as unchanged', () => {
    expect(wordDiff('one  two\nthree', 'one two three')).toEqual([
      { type: 'same', text: 'one two three' },
    ]);
  });

  it('keeps paragraph breaks as words', () => {
    expect(wordDiff('one\n\ntwo', 'one\n\ntwo')).toEqual([
      { type: 'same', text: `one ${PARAGRAPH} two` },
    ]);
  });

  it('shows an empty side whole', () => {
    expect(wordDiff('', 'new text')).toEqual([
      { type: 'add', text: 'new text' },
    ]);
    expect(wordDiff('old', '')).toEqual([{ type: 'del', text: 'old' }]);
  });
});

describe('htmlToText', () => {
  it('keeps blocks apart and drops the tags', () => {
    expect(
      htmlToText(
        '<div class="intro"><p>One <strong>two</strong></p></div><h2>Three</h2><ul><li>four</li><li>five</li></ul>'
      )
    ).toBe('One two\n\nThree\n\nfour\n\nfive');
  });
});