text: import * as webdriver from 'selenium-webdriver';
  export var browser = global['browser'];
  export var $ = global['$'];
  export function clickAll(buttonSelectors) {
      buttonSelectors.forEach(function (selector) { $(selector).click(); });
  }
  export function verifyNoBrowserErrors() {
      // TODO(tbosch): Bug in ChromeDriver: Need to execute at least one command
      // so that the browser logs can be read out!
      browser.executeScript('1+1');
      browser.manage().logs().get('browser').then(function (browserLog) {
          var filteredLog = browserLog.filter(function (logEntry) {
              if (logEntry.level.value >= webdriver.logging.Level.INFO.value) {
                  console.log('>> ' + logEntry.message);
              }
              return logEntry.level.value > webdriver.logging.Level.WARNING.value;
          });
          expect(filteredLog).toEqual([]);
      });
  }
  