Shadow DOM feature of HtmlUnit doesn't appear to work

HtmlUnitDriver version 2.40.0

I see evidence in the code that the shadow DOM feature is supported by HtmlUnit with version set to “chrome”. When I try using this, however, it doesn’t appear to actually work.

package com.nordstrom.automation.selenium.model;

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.MutableCapabilities;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;
import org.testng.annotations.Test;

public class FooBar {
	
	@Test
	public void foo() {
		MutableCapabilities caps = new MutableCapabilities();
		caps.setCapability("browserName", "htmlunit");
		caps.setCapability("browserVersion", "chrome");
		caps.setCapability("javascriptEnabled", true);
		HtmlUnitDriver driver = new HtmlUnitDriver(caps);
		driver.get("file:/C:/github/Selenium-Foundation/target-s3/test-classes/ExamplePage.html");
		WebElement elem = driver.findElement(By.cssSelector("div#shadow-root-a"));
		Object bar = ((JavascriptExecutor) driver).executeScript("return arguments[0].shadowRoot;", elem);
	}

}

The value of [bar] comes up null

[rbri]

Have written some words - more will follow (see my last commit).

I haven’t found any W3C Java interfaces that declare the shadow hierarchy. Do these even exist?

No idea - i expect we can use the same classes as base classes as we have for the real dom.

Maybe you can start with ShadowRoot as subclass of DocumentFragment and DomShadowRoot as subclass of DomDocumentFragment.

[sbabcoc]

@rbri I’ve started a pull request in my fork of the HtmlUnit project: https://github.com/sbabcoc/htmlunit/pull/1