1 files changed, 88 insertions, 0 deletions
diff --git a/dom/workers/test/importScripts_3rdParty_worker.js b/dom/workers/test/importScripts_3rdParty_worker.js
new file mode 100644
index 0000000000..326d48f77a
--- /dev/null
+++ b/dom/workers/test/importScripts_3rdParty_worker.js
@@ -0,0 +1,88 @@
+const workerURL =
+  "http://mochi.test:8888/tests/dom/workers/test/importScripts_3rdParty_worker.js";
+
+onmessage = function (a) {
+  if (a.data.nested) {
+    var worker = new Worker(workerURL);
+    worker.onmessage = function (event) {
+      postMessage(event.data);
+    };
+
+    worker.onerror = function (event) {
+      event.preventDefault();
+      postMessage({
+        error: event instanceof ErrorEvent && event.filename == workerURL,
+      });
+    };
+
+    a.data.nested = false;
+    worker.postMessage(a.data);
+    return;
+  }
+
+  // This first URL will use the same origin of this script.
+  var sameOriginURL = new URL(a.data.url);
+  var fileName1 = 42;
+
+  // This is cross-origin URL.
+  var crossOriginURL = new URL(a.data.url);
+  crossOriginURL.host = "example.com";
+  crossOriginURL.port = 80;
+  var fileName2 = 42;
+
+  if (a.data.test == "none") {
+    importScripts(crossOriginURL.href);
+    return;
+  }
+
+  try {
+    importScripts(sameOriginURL.href);
+  } catch (e) {
+    if (!(e instanceof SyntaxError)) {
+      postMessage({ result: false });
+      return;
+    }
+
+    fileName1 = e.fileName;
+  }
+
+  if (fileName1 != sameOriginURL.href || !fileName1) {
+    postMessage({ result: false });
+    return;
+  }
+
+  if (a.data.test == "try") {
+    var exception;
+    try {
+      importScripts(crossOriginURL.href);
+    } catch (e) {
+      fileName2 = e.filename;
+      exception = e;
+    }
+
+    postMessage({
+      result:
+        fileName2 == workerURL &&
+        exception.name == "NetworkError" &&
+        exception.code == DOMException.NETWORK_ERR,
+    });
+    return;
+  }
+
+  if (a.data.test == "eventListener") {
+    addEventListener("error", function (event) {
+      event.preventDefault();
+      postMessage({
+        result: event instanceof ErrorEvent && event.filename == workerURL,
+      });
+    });
+  }
+
+  if (a.data.test == "onerror") {
+    onerror = function (...args) {
+      postMessage({ result: args[1] == workerURL });
+    };
+  }
+
+  importScripts(crossOriginURL.href);
+};