golden/modules/image-compare-sk/image-compare-sk_test.js

import './index';
import { $, $$ } from 'common-sk/modules/dom';
import { eventPromise, setUpElementUnderTest } from '../../../infra-sk/modules/test_util';

const aDigest = '6246b773851984c726cb2e1cb13510c2';
const bDigest = '99c58c7002073346ff55f446d47d6311';

describe('image-compare-sk', () => {
  const newInstance = setUpElementUnderTest('image-compare-sk');

  let imageCompareSk;
  beforeEach(() => imageCompareSk = newInstance());

  describe('layout with right and left', () => {
    beforeEach(() => {
      imageCompareSk.left = {
        digest: aDigest,
        title: 'a digest title',
        detail: 'example.com#aDigest',
      };
      imageCompareSk.right = {
        digest: bDigest,
        title: 'the other image',
        detail: 'example.com#bDigest',
      };
    });

    it('has three images (left, diff, right) with a zoom button', () => {
      const images = $('img', imageCompareSk);
      expect(images.length).to.equal(3);
      const zBtn = $$('button.zoom_btn');
      expect(zBtn.hidden).to.be.false;
    });

    it('captions the images with the respective links', () => {
      const captions = $('figcaption a', imageCompareSk);
      expect(captions.length).to.equal(2);
      const captionsText = captions.map((c) => c.textContent);
      const captionsHref = captions.map((c) => c.href.substring(c.href.lastIndexOf('/')));

      expect(captionsText).to.contain('a digest title');
      expect(captionsText).to.contain('the other image');

      expect(captionsHref).to.contain('/example.com#aDigest');
      expect(captionsHref).to.contain('/example.com#bDigest');
    });

    it('fires events when the zoom dialog is opened and closed', async () => {
      expect($$('multi-zoom-sk', imageCompareSk)).to.be.null; // not rendered at first
      const openPromise = eventPromise('zoom-dialog-opened');
      $$('button.zoom_btn', imageCompareSk).click();
      await openPromise;
      expect($$('multi-zoom-sk', imageCompareSk)).to.not.be.null; // element should be there now.

      const closePromise = eventPromise('zoom-dialog-closed');
      $$('button.close_btn', imageCompareSk).click();
      await closePromise;
      expect($$('multi-zoom-sk', imageCompareSk)).to.be.null; // it should be removed from the DOM.
    });
  });

  describe('layout with just left', () => {
    beforeEach(() => {
      imageCompareSk.left = {
        src: aDigest,
        title: 'a digest title',
        detail: 'example.com#aDigest',
      };
    });

    it('has one image and no zoom button', () => {
      const images = $('img', imageCompareSk);
      expect(images.length).to.equal(1);
      const zBtn = $$('button.zoom_btn', imageCompareSk);
      expect(zBtn.hidden).to.be.true;
    });
  });
});