Question

我正在尝试遵循Protractors official site上的量角器教程，但我什至无法完成步骤0。

我在版本6.0.0中使用量角器和webdriver-manager。我的SO是Linux（Ubuntu 18.06），而我的Chrome是最新的（73.0.3683.86）。安装量角器后，我不得不降级默认安装的chromedriver，因为它期望我拥有Chrome74。我通过执行webdriver-manager --versions.chrome 73.0.3683.68降级了它。

在那之后，我一直遵循本教程的步骤0。我有configuration.js文件和test-spec.js文件，如下所示：

configuration.js

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

test-spec.js

describe('Protractor Demo App', function() {
    it('should have a title', function() {
        browser.get('http://juliemr.github.io/protractor-demo/');
        expect(browser.getTitle()).toEqual('Super Calculator');
    });
});

运行protactor protractor configuration.js时出现以下错误：

[15:15:13] I/hosted - Using the selenium server at http://localhost:4444/wd/hub
DEPRECATION: Setting randomizeTests directly is deprecated, please use the random option in `configure`
DEPRECATION: Setting specFilter directly on Env is deprecated, please use the specFilter option in `configure`
Started
F

Failures:
1) Protractor Demo App should have a title
  Message:
    Expected [object Promise] to equal 'Super Calculator'.
  Stack:
    Error: Expected [object Promise] to equal 'Super Calculator'.
        at 
        at UserContext. (/home/srubio/Escritorio/Protractor/test-spec.js:5:32)
        at 

1 spec, 1 failure
Finished in 0.009 seconds
/home/srubio/n/lib/node_modules/protractor/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:3190
        throw arguments[0];
        ^

Error: Error while waiting for Protractor to sync with the page: "both angularJS testability and angular testability are undefined.  This could be either because this is a non-angular page or because your test involves client-side navigation, which can interfere with Protractor's bootstrapping.  See http://git.io/v4gXM for details"
    at ProtractorBrowser. (/home/srubio/n/lib/node_modules/protractor/built/browser.js:354:27)
    at Generator.next ()
    at fulfilled (/home/srubio/n/lib/node_modules/protractor/built/browser.js:4:58)
    at processTicksAndRejections (internal/process/next_tick.js:81:5)

Answer 1

更新此答案

Protractor version 6.0使用selenium version 4，这是第一个删除对控制流的支持的硒版本。控制流程使量角器可以执行类似的代码

browser.get('http://google.com');
expect(browser.getTitle()).toEqual('Super Calculator');

以同步方式。

到目前为止，一直使用控制流来以用户友好的方式处理webdriverJS承诺的异步性质。一旦es8 async/await样式的承诺处理得到支持，便决定弃用控制流并建议用户利用异步/等待进行。

原始答案

6.0是量角器的latest version，我相信它是3天前（大约22 / March / 19）发布的，它放弃了对以前默认启用的控制流的支持。显然，教程文档尚未更新以反映此问题，但是我相信这就是为什么您看到此问题。

展望未来，您将需要使用async/await语法（在我看来，它实际上更具可读性和易用性）

尝试以下代码：

configuration.js

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

test-spec.js

describe('Protractor Demo App', function() {
    it('should have a title', async function() {
        await browser.get('http://juliemr.github.io/protractor-demo/');
        expect(await browser.getTitle()).toEqual('Super Calculator');
    });
});

更新：如果您尝试将SELENIUM_PROMISE_MANAGER: true,添加到configuration.js中，这可能使您可以在编写演示时继续进行演示。

量角器“在等待量角器与页面同步时出错”浏览Angular网站

1 个答案: