How do I load a javascript file into the DOM using selenium?

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I’m using Selenium WebDriver to try to insert an external javascript file into the DOM, rather than type out the entire thing into executeScript.

It looks like it properly places the node into the DOM, but then it just disregards the source, i.e. the function on said source js file doesn’t run.

Here is my code:

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
public class Example {
public static void main(String[] args) {
WebDriver driver = new FirefoxDriver();
driver
.get("http://google.com");
JavascriptExecutor js = (JavascriptExecutor) driver;
js
.executeScript("document.getElementsByTagName('head')[0].innerHTML += '<script src=\"<PATH_TO_FILE>\" type=\"text/javascript\"></script>';");
}
}

The code of the javascript file I am linking to is

alert("hi Nate");

I’ve placed the js file on my localhost, I called it using file:///, and I tried it on an external server. No dice.

Also, in the Java portion, I tried appending ‘scr’+’ipt’ using that trick, but it still didn’t work. When I inspect the DOM using Firefox’s inspect element, I can see it loads the script node properly, so I’m quite confused.

I also tried this solution, which apparently was made for another version of Selenium (not webdriver) and thus didn’t work in the least bit: Load an external js file containing useful test functions in selenium

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According to this: http://docs.seleniumhq.org/docs/appendix_migrating_from_rc_to_webdriver.jsp

You might be using the browserbot to obtain a handle to the current
window or document of the test. Fortunately, WebDriver always
evaluates JS in the context of the current window, so you can use
“window” or “document” directly.

Alternatively, you might be using the browserbot to locate elements.
In WebDriver, the idiom for doing this is to first locate the element,
and then pass that as an argument to the Javascript. Thus:

So does the following work in webdriver?

WebDriver driver = new FirefoxDriver();
((JavascriptExecutor) driver)
.executeScript("var s=window.document.createElement('script');\
s
.src='somescript.js';\
window
.document.head.appendChild(s);");
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