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

const expect = require('chai').expect;
const path = require('path');
const setUpPuppeteerAndDemoPageServer = require('../../../puppeteer-tests/util').setUpPuppeteerAndDemoPageServer;
const takeScreenshot = require('../../../puppeteer-tests/util').takeScreenshot;

describe('image-compare-sk', () => {
  // Contains page and baseUrl.
  const testBed = setUpPuppeteerAndDemoPageServer(path.join(__dirname, '..', '..', 'webpack.config.js'));

  beforeEach(async () => {
    await testBed.page.goto(`${testBed.baseUrl}/dist/image-compare-sk.html`, { waitUntil: 'networkidle0' });
  });

  it('should render the demo page', async () => {
    // Smoke test.
    expect(await testBed.page.$$('image-compare-sk')).to.have.length(2);
  });

  describe('screenshots', () => {
    it('has the left and right image', async () => {
      const imageCompareSk = await testBed.page.$('#normal');
      await takeScreenshot(imageCompareSk, 'gold', 'image-compare-sk');
    });

    it('shows the multi-zoom-sk dialog when zoom button clicked', async () => {
      await testBed.page.setViewport({ width: 1000, height: 800 });
      await testBed.page.click('#normal button.zoom_btn');
      await takeScreenshot(testBed.page, 'gold', 'image-compare-sk_zoom-dialog');
    });

    it('has just the left image', async () => {
      const imageCompareSk = await testBed.page.$('#no_right');
      await takeScreenshot(
        imageCompareSk, 'gold', 'image-compare-sk_no-right',
      );
    });
  });
});