如何用量角器或硒测试@media print?

How to test @media print with protractor or selenium?(如何用量角器或硒测试@media print?)

问题描述

我已经在我的网站上实现了打印功能，我想通过量角器/硒对其进行测试.

I've implemented an print functionallity at my site, and I would like to test it via protractor / selenium.

在测试期间有什么方法可以应用" @media print 下的样式?

There is any method to "apply" the styles that are under @media print during the test?

我只看到了一个相关的问题，但它没有任何好的答案.

I saw only one relevant question, but it without any good answer.

例如在那个示例中，我希望 #hidden div 将在测试期间显示.

For example at that sample I would like to the #hidden div will be shown during the test.

.print-only {
  display: none;
}

@media print {
  .print-only {
    display: block;
  }
}

<div id="hidden" class="print-only">Will be shown when printing</div>

推荐答案

我发现的一个选项是将所有打印" css 拆分为一个单独的文件，并通过 link 加载它带有 media="print" 的标签.

One option that I've found is to split all the "print" css into a separate file, and load it via link tag with media="print".

<link rel="stylesheet" type="text/css" href="print.css" media="print">

意思是根本不在大型css文件中使用媒体查询.

Meaning not to use media query inside large css file at all.

这样我可以在测试期间通过 executeScript 将 media="print" 属性更改为 all.

That way will allow me to change the media="print" attribute during test to all via executeScript.

希望对某人有所帮助.

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