从量角器访问窗口对象/浏览器范围 [英] Access window object / browser scope from protractor

问题描述

我正在使用量角器运行测试，但似乎无法访问JS'window'对象。我甚至尝试在我的html文件中添加一个标签，其中包含类似

I'm running tests with protractor, but it seems impossible to access the JS 'window' object. I even tried adding a tag in my html file that would contain something like

var a = window.location;

然后尝试期待（a）但我无法使其工作，我总是得到未定义的引用...

and then try expect(a) but I couldn't make it work, I always get undefined references...

如何处理以访问浏览器范围内的变量？

How should I process to access variables that are in the browser scope ?

推荐答案

假设您使用的是最新版本的Protractor，假设> = 1.1.0，希望> = 1.3.1

Assuming you are using a recent version of Protractor, let's say >= 1.1.0, hopefully >= 1.3.1

尝试访问浏览器直接来自Protractor的JS代码不起作用，因为Protractor在NodeJS中运行，每个浏览器端代码都是通过Selenium执行的 JsonWireProtocol 。

Attempting to access Browser side JS code directly from Protractor won't work because Protractor runs in NodeJS and every Browser side code is executed through Selenium JsonWireProtocol.

没有进一步的细节，一个工作的例子：

Without further detail, a working example:

browser.get('https://angularjs.org/');

一线承诺，截至今日，解析为'1.3。 0-rc.3'

One-liner promise that, as of today, resolves to '1.3.0-rc.3'

browser.executeScript('return window.angular.version.full;');

您可以直接在预期声明中使用它，因为Protractor期望为您解决承诺：

You can use it directly in an expect statement given Protractor's expect resolves promises for you:

expect(browser.executeScript('return window.angular.version.full;')).
  toEqual('1.3.0-rc.3');

更长的示例传递函数而不是字符串加上没有期望为您解决承诺。即为了更多的控制和对结果做一些奇特的事情。

Longer example passing a function instead of a string plus without expect resolving the promise for you. i.e. for more control and for doing some fancy thing with the result.

browser.driver.executeScript(function() {
    return window.angular.version.full;
}).then(function(result) {
    console.log('NodeJS-side console log result: ' + result);
    //=> NodeJS-side console log result: 1.3.0-rc.3
});

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