Add tests for importing revoked blob URLs across agents (#30986)

Ref: denoland/deno#12248

html/semantics/scripting-1/the-script-element/module/dynamic-import/blob-url-workers.window.js

@@ -0,0 +1,60 @@
+function objectUrlFromModule(module) {
+  const blob = new Blob([module], { type: "text/javascript" });
+  return URL.createObjectURL(blob);
+}
+
+const moduleText = `export const foo = "bar";`;
+
+async_test((t) => {
+  const moduleBlobUrl = objectUrlFromModule(moduleText);
+  t.add_cleanup(() => URL.revokeObjectURL(moduleBlobUrl));
+
+  const worker = new Worker("./resources/blob-url-worker.js");
+  worker.postMessage(moduleBlobUrl);
+
+  worker.addEventListener(
+    "message",
+    t.step_func_done((evt) => {
+      assert_true(evt.data.importSucceeded);
+      assert_equals(evt.data.module.foo, "bar");
+    })
+  );
+}, "A blob URL created in a window agent can be imported from a worker");
+
+async_test((t) => {
+  const moduleBlobUrl = objectUrlFromModule(moduleText);
+  URL.revokeObjectURL(moduleBlobUrl);
+
+  const worker = new Worker("./resources/blob-url-worker.js");
+  worker.postMessage(moduleBlobUrl);
+
+  worker.addEventListener(
+    "message",
+    t.step_func_done((evt) => {
+      assert_false(evt.data.importSucceeded);
+      assert_equals(evt.data.errorName, "TypeError");
+    })
+  );
+}, "A blob URL revoked in a window agent will not resolve in a worker");
+
+promise_test(async (t) => {
+  const moduleBlobUrl = objectUrlFromModule(moduleText);
+
+  await import(moduleBlobUrl);
+
+  URL.revokeObjectURL(moduleBlobUrl);
+
+  const worker = new Worker("./resources/blob-url-worker.js");
+  worker.postMessage(moduleBlobUrl);
+
+  await new Promise((resolve) => {
+    worker.addEventListener(
+      "message",
+      t.step_func((evt) => {
+        assert_false(evt.data.importSucceeded);
+        assert_equals(evt.data.errorName, "TypeError");
+        resolve();
+      })
+    );
+  });
+}, "A revoked blob URL will not resolve in a worker even if it's in the window's module graph");

html/semantics/scripting-1/the-script-element/module/dynamic-import/resources/blob-url-worker.js

@@ -0,0 +1,11 @@
+self.addEventListener("message", (evt) => {
+  const importModule = import(evt.data);
+  importModule.then(
+    (module) => {
+      self.postMessage({ importSucceeded: true, module: { ...module } });
+    },
+    (error) => {
+      self.postMessage({ importSucceeded: false, errorName: error.name });
+    }
+  );
+});