Run an accessibility test and generate report with Puppeteer and Accessibility Developer Tools - https://github.com/GoogleChrome/accessibility-developer-tools.

accessibility-check.js

const puppeteer = require('puppeteer');
const fs = require('fs');

(async () => {
    const browser = await puppeteer.launch({
        userDataDir: './myUserDataDir',
        dumpio: true,
    });
    const page = await browser.newPage();
    await page.goto('https://google.com');
    // download it from here: https://raw.github.com/GoogleChrome/accessibility-developer-tools/stable/dist/js/axs_testing.js
    await page.evaluate(fs.readFileSync('./axs_testing.js', 'utf8'));

    const audit = await page.evaluate(() => {
        const results = window.axs.Audit.run();
        return window.axs.Audit.createReport(results);
    });

    console.log(audit);

    await browser.close();
})();