angular-docs-cn/modules/angular2/src/test_lib/e2e_util.es6

var webdriver = require('selenium-webdriver');

module.exports = {
  verifyNoBrowserErrors: verifyNoBrowserErrors,
  clickAll: clickAll
};

function clickAll(buttonSelectors) {
  buttonSelectors.forEach(function(selector) {
    $(selector).click();
  });
}

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) {
      console.log('>> ' + require('util').inspect(logEntry));
      return logEntry.level.value > webdriver.logging.Level.WARNING.value;
    });
    expect(filteredLog.length).toEqual(0);
  });
}