量角器尝试在IE浏览器中运行时出现错误

Question

在尝试设置量角器以在Internet Explorer中运行测试时，出现以下错误。什么都没运行，尝试开始使用命令protractor conf.js时出现以下错误。

  [14:19:47] I/launcher - Running 1 instances of WebDriver
    [14:19:47] I/hosted - Using the selenium server at http://localhost:4444/wd/hub
    [14:19:47] E/launcher - Unable to create new service: InternetExplorerDriverServ
    ice
    Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:25
    :53'
    System info: host: 'PCN0456609', ip: '172.29.54.56', os.name: 'Windows 7', os.ar
    ch: 'amd64', os.version: '6.1', java.version: '1.8.0_151'
    Driver info: driver.version: unknown
    [14:19:47] E/launcher - SessionNotCreatedError: Unable to create new service: In
    ternetExplorerDriverService
    Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:25
    :53'

以下是我的conf.js文件-

exports.config = {
    seleniumAddress: 'http://localhost:4444/wd/hub',
    specs: ['todo-spec.js'],
    multiCapabilities : [
        {
          'browserName' : 'internet explorer'
        }
      ]
  };

以下是我的测试规格-

describe('angularjs homepage todo list', function() {
    it('should add a todo', function() {
      browser.get('https://angularjs.org');

      element(by.model('todoList.todoText')).sendKeys('write first protractor test');
      element(by.css('[value="add"]')).click();

      var todoList = element.all(by.repeater('todo in todoList.todos'));
      expect(todoList.count()).toEqual(3);
      expect(todoList.get(2).getText()).toEqual('write first protractor test');

      // You wrote your first test, cross it off the list
      todoList.get(2).element(by.css('input')).click();
      var completedAmount = element.all(by.css('.done-true'));
      expect(completedAmount.count()).toEqual(2);
    });
  });