如何在 Selenium WebDriver Java 中使用 JavaScript [英] How to use JavaScript with Selenium WebDriver Java

问题描述

我想在使用 Java 的 WebDriver (Selenium 2) 中使用 JavaScript.

I want to use JavaScript with WebDriver (Selenium 2) using Java.

我遵循了一些指南和入门 page:在第一行有一条指令可以作为:

I've followed some a guide and on Getting Started page: there is an instruction at 1st line to run as:

$ ./go webdriverjs

我的问题:上面提到的命令将从哪个文件夹/位置运行/执行?

My question: From which folder/location the command mentioned above will be run/executed?

推荐答案

根据您之前的问题，我想您想从 Java 的 WebDriver 运行 JavaScript 片段.如果我错了，请纠正我.

Based on your previous questions, I suppose you want to run JavaScript snippets from Java's WebDriver. Please correct me if I'm wrong.

WebDriverJs 实际上只是"另一个 WebDriver 语言绑定(你可以用 Java、C#、Ruby、Python、JS 和现在可能更多的语言编写你的测试).这尤其是 JavaScript，因此您可以使用 JavaScript 编写测试.

The WebDriverJs is actually "just" another WebDriver language binding (you can write your tests in Java, C#, Ruby, Python, JS and possibly even more languages as of now). This one, particularly, is JavaScript, and allows you therefore to write tests in JavaScript.

如果您想在 Java WebDriver 中运行 JavaScript 代码，请改为这样做:

If you want to run JavaScript code in Java WebDriver, do this instead:

WebDriver driver = new AnyDriverYouWant();
if (driver instanceof JavascriptExecutor) {
    ((JavascriptExecutor)driver).executeScript("yourScript();");
} else {
    throw new IllegalStateException("This driver does not support JavaScript!");
}

我也喜欢这样做:

WebDriver driver = new AnyDriverYouWant();
JavascriptExecutor js;
if (driver instanceof JavascriptExecutor) {
    js = (JavascriptExecutor)driver;
} // else throw...

// later on...
js.executeScript("return document.getElementById('someId');");

您可以在此处的文档中找到更多文档，或者最好是 inJavascriptExecutor 的 JavaDocs.

You can find more documentation on this here, in the documenation, or, preferably, in the JavaDocs of JavascriptExecutor.

executeScript() 也接受函数调用和原始 JS.你可以从它返回一个值，你可以向它传递许多复杂的参数，一些随机的例子:

The executeScript() takes function calls and raw JS, too. You can return a value from it and you can pass lots of complicated arguments to it, some random examples:

1.

    // returns the right WebElement
    // it's the same as driver.findElement(By.id("someId"))
    js.executeScript("return document.getElementById('someId');");

 // draws a border around WebElement
 WebElement element = driver.findElement(By.anything("tada"));
 js.executeScript("arguments[0].style.border='3px solid red'", element);

 // changes all input elements on the page to radio buttons
 js.executeScript(
         "var inputs = document.getElementsByTagName('input');" +
         "for(var i = 0; i < inputs.length; i++) { " +
         "    inputs[i].type = 'radio';" +
         "}" );

这篇关于如何在 Selenium WebDriver Java 中使用 JavaScript的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！