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import { assertEquals } from "https://deno.land/std@0.75.0/testing/asserts.ts";import {  basename,  dirname,  join,} from "https://deno.land/std@0.75.0/path/mod.ts";import { DOMParser, Element } from "../deno-dom-wasm.ts";
const parser = new DOMParser();const cachedScripts: { [script: string]: string } = {};export type Backend = "wasm" | "native";
export async function run(path: string, root: string, backend: Backend) {  const html = await Deno.readTextFile(path);  const doc = parser.parseFromString(html, "text/html")!;  let scripts = Array.from(doc.querySelectorAll("script")).map((scriptNode) => {    const scriptElement = scriptNode as Element;    let script = scriptElement.getAttribute("src")!;    let scriptContents: string;
    if (script) {      if (script[0] === "/") {        script = root + script;      } else {        script = join(dirname(path), script);      }
      if (cachedScripts[script]) {        scriptContents = cachedScripts[script];      } else {        scriptContents = cachedScripts[script] = Deno.readTextFileSync(script);      }    } else {      scriptContents = scriptElement.textContent;    }
    return scriptContents;  });
  const workerOptions = { type: "module" } as const;  if (backend === "native") {    (workerOptions as any).deno = {      namespace: true,    };  }
  const worker = new Worker(    new URL("./wpt-runner-worker.ts", import.meta.url).href,    workerOptions,  );  worker.postMessage({    backend,    html,    scripts,  });
  await new Promise<void>((resolve, reject) => {    worker.addEventListener("error", (event) => {      event.preventDefault();      worker.terminate();      reject(event);    });
    worker.addEventListener("message", (event) => {      worker.terminate();      resolve();    });  });}