tests: run wpt scripts with Deno.core.evalContext (#10852)

This means wpts are now run in script context, and there are better
stack traces.

1 files changed, 21 insertions, 9 deletions

diff --git a/tools/wpt/runner.ts b/tools/wpt/runner.ts
index dcc88a123..52768f079 100644
--- a/tools/wpt/runner.ts
+++ b/tools/wpt/runner.ts
@@ -1,5 +1,5 @@
 // Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
-import { delay, join, readLines, ROOT_PATH } from "../util.js";
+import { delay, join, readLines, ROOT_PATH, toFileUrl } from "../util.js";
 import { assert, ManifestTestOptions, release, runPy } from "./utils.ts";
 import { DOMParser } from "https://deno.land/x/deno_dom@v0.1.3-alpha2/deno-dom-wasm.ts";
 
@@ -140,20 +140,32 @@ async function generateBundle(location: URL): Promise<string> {
   assert(doc, "document should have been parsed");
   const scripts = doc.getElementsByTagName("script");
   const scriptContents = [];
+  let inlineScriptCount = 0;
   for (const script of scripts) {
     const src = script.getAttribute("src");
     if (src === "/resources/testharnessreport.js") {
-      scriptContents.push(
-        await Deno.readTextFile(
-          join(ROOT_PATH, "./tools/wpt/testharnessreport.js"),
-        ),
+      const url = toFileUrl(
+        join(ROOT_PATH, "./tools/wpt/testharnessreport.js"),
       );
+      const contents = await Deno.readTextFile(url);
+      scriptContents.push([url.href, contents]);
     } else if (src) {
-      const res = await fetch(new URL(src, location));
-      scriptContents.push(await res.text());
+      const url = new URL(src, location);
+      const res = await fetch(url);
+      if (res.ok) {
+        const contents = await res.text();
+        scriptContents.push([url.href, contents]);
+      }
     } else {
-      scriptContents.push(script.textContent);
+      const url = new URL(`#${inlineScriptCount}`, location);
+      inlineScriptCount++;
+      scriptContents.push([url.href, script.textContent]);
     }
   }
-  return scriptContents.join("\n");
+
+  return scriptContents.map(([url, contents]) =>
+    `Deno.core.evalContext(${JSON.stringify(contents)}, ${
+      JSON.stringify(url)
+    });`
+  ).join("\n");
 }