noredink-ui/script/percy-tests.js

const PercyScript = require('@percy/script')

PercyScript.run(async (page, percySnapshot) => {
  const defaultProcessing = async (name, location) => {
    await page.goto(location)
    await page.waitFor(`#${name}`)
    await percySnapshot(name)
    console.log(`Snapshot complete for ${name}`)
  }
  const specialProcessing = {
    'Modal': async (name, location) => {
      await defaultProcessing(name, location)
      await page.click('#launch-modal')
      await page.waitFor('[role="dialog"]')
      await percySnapshot('Full Info Modal')
      await page.click('[aria-label="Close modal"]')
      await page.select('select', 'warning')
      await page.click('#launch-modal')
      await page.waitFor('[role="dialog"]')
      await percySnapshot('Full Warning Modal')
      await page.click('[aria-label="Close modal"]')
    }
  }
  await page.goto('http://localhost:8000')
  await page.waitFor('.module-example__doodad-link')
  let links = await page.evaluate(() => {
      let nodes = Array.from(document.querySelectorAll('.module-example__doodad-link'));
      return nodes.map(node => [node["dataset"]["percyName"], node.href])
  });

  await links.reduce((acc, [name, location]) => {
    return acc.then(() => {
        let handler = specialProcessing[name] || defaultProcessing
        return handler(name, location)
      }
    )
  }, Promise.resolve())
})