Test file:

// spec.js
describe('angularjs homepage', function() {
  it('should have a title', function() {
    browser.get('http://www.angularjs.org');    
    expect(browser.getTitle()).toEqual('AngularJS — Superheroic JavaScript MVW Framework');
  });
});

Configuration file conf.js:

// conf.js
exports.config = {
  seleniumAddress: 'http://localhost:4444/wd/hub',
  specs: ['spec.js']
}

Run command: protractor conf.js
Console error: Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL?

I ran it directly using the example in this tutorial (http://blog.csdn.net/huwei2003/article/details/48493977），新手不知道怎么解决，求指点