Scott Babcock sbabcoc

Q: What's driving this — contributing full Shadow DOM support upstream to HtmlUnit itself, or just getting HtmlUnit(Driver) far enough to test your own shadow-DOM-based pages?
A: Upstream contribution to HtmlUnit/htmlunit

Q: How much of the spec actually matters for your use case?
A: Full spec: closed mode, CSS encapsulation, event retargeting, declarative shadow DOM

Good — that confirms the scope. A few more things worth knowing before any code gets written:

• DomNode.querySelector() (the core query engine, ~2200 lines) has no shadow-boundary awareness — it would need to become shadow-tree-scoped by default, with an explicit "deep" path for things like getElementById semantics across the tree.
• The CSS engine isn't part of HtmlUnit itself — it's htmlunit-cssparser, a separate library, also maintained by Ronald Brill (rbri), same for the HTML parser (neko-htmlunit). Full CSS encapsulation (:host, :host(), ::slotted, and correctly not leaking outer-page styles into the sha

I want to see if we can add Shadow DOM support to the HtmlUnit headless browser.

I dug into the actual HtmlUnit/htmlunit source (cloned master) rather than go on general knowledge, since this is exactly the kind of thing that goes stale. Here's where it actually stands:

Current state (much thinner than it looks):

• org.htmlunit.javascript.host.dom.ShadowRoot exists — but it's a bare stub: extends DocumentFragment, has a constructor and nothing else. No host, no mode, no innerHTML override.
• Element.attachShadow() does not exist at all. There's a comment in Element.getInnerHTML()/getOuterHTML() that literally says // ignore the params because we have no shadow dom support so far.
• <slot> (HtmlSlot / HTMLSlotElement) is registered as a tag with display: contents, but there's no slot-distribution algorithm — no assignedNodes(), no assignedSlot, no slotchange event.
• CustomElementRegistry exists as a JS class but has no define() method — Custom Elements ar

Here is a comprehensive T-SQL (Transact-SQL) cheat sheet designed for quick reference. It covers everything from basic querying to SQL Server-specific features like CTEs, Window Functions, and error handling.

Understanding the order in which SQL Server processes a query is crucial for debugging performance and logic errors.

1. FROM / JOIN (Gathering data)
2. WHERE (Filtering rows)

Coming from Java, you’ll find that TypeScript feels incredibly familiar but with a few "dynamic" twists. TypeScript brings the static typing and object-oriented principles you know from Java, but compiles down to JavaScript.

The biggest mental shift is that Java uses nominal typing (types are matched by name/inheritance), while TypeScript uses structural typing (types are matched by their shape/structure, often called "duck typing").

Here is how core software patterns and implementations translate from Java to TypeScript.

Yes, you can replicate this kind of Intent verification in an integration test, where you validate that your application actually sends an intent to the system as part of its behavior when interacting with the UI. For integration testing with intents, Espresso-Intents is often the go-to library in Android. Here’s how you can use Espresso-Intents for integration testing of intent actions.

Espresso-Intents lets you intercept and verify outgoing intents without actually launching the external application (like the browser). This approach is more robust in integration tests because it ensures your app is interacting correctly with the Android system.

1. Add Espresso-Intents Dependency Ensure you have Espresso-Intents in your build.gradle file for your androidTest scope:

Certainly! When you use Mockito for testing intent actions, you're primarily concerned with verifying that your application correctly creates and sends the Intent for specific actions (like opening a URL in a browser). Here’s a breakdown of how to set up and use Mockito to test Intent actions in Android:

1. Add Mockito Dependencies Ensure you have the necessary dependencies for Mockito in your build.gradle file:

   testImplementation 'org.mockito:mockito-core:4.x.x'
   testImplementation 'org.mockito:mockito-inline:4.x.x' // For mocking final classes/methods

In Selenium 4, you can add arbitrary headers to HTTP requests using the DevTools protocol, which is now integrated into Selenium. Here's how you can do it with Chrome or Edge:

1. Set up the ChromeDriver or EdgeDriver:

import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.devtools.DevTools;