refactor(e2e-test): wrap the test registration

packages/core/scripts/register-e2e-test.js

@@ -0,0 +1,35 @@
+'use strict';
+
+const fs = require('fs');
+const webdriver = require('selenium-webdriver');
+
+function takeScreenshot(driver, name) {
+  return driver.takeScreenshot().then(function(data) {
+    var base64Data = data.replace(/^data:image\/png;base64,/, '');
+    fs.writeFile(`${name}.png`, base64Data, 'base64', function(err) {
+      if (err) console.log(err);
+    });
+  });
+}
+
+function allowForAnnimation() {
+  return new Promise((resolve, reject) => {
+    setTimeout(function() {
+      resolve();
+    }, 300);
+  });
+}
+
+function registerE2ETest(desc, tst) {
+  it(desc, async () => {
+    const driver = new webdriver.Builder().forBrowser('chrome').build();
+    await tst(driver);
+    if (process.env.takeScreenshots) {
+      await allowForAnnimation();
+      takeScreenshot(driver, desc);
+    }
+    return driver.quit();
+  });
+}
+
+module.exports = registerE2ETest;