1 files changed, 49 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/scripting/events/event-handler-processing-algorithm-error/workerglobalscope-synthetic-errorevent.worker.js b/testing/web-platform/tests/html/webappapis/scripting/events/event-handler-processing-algorithm-error/workerglobalscope-synthetic-errorevent.worker.js
new file mode 100644
index 0000000000..a14f6e01a9
--- /dev/null
+++ b/testing/web-platform/tests/html/webappapis/scripting/events/event-handler-processing-algorithm-error/workerglobalscope-synthetic-errorevent.worker.js
@@ -0,0 +1,49 @@
+"use strict";
+importScripts("/resources/testharness.js");
+
+setup({ allow_uncaught_exception: true });
+
+promise_test(t => {
+  self.onerror = t.step_func((...args) => {
+    assert_greater_than(args.length, 1);
+    return true;
+  });
+
+  const eventWatcher = new EventWatcher(t, self, "error");
+  const promise = eventWatcher.wait_for("error").then(e => {
+    assert_equals(e.defaultPrevented, true);
+  });
+
+  self.dispatchEvent(new ErrorEvent("error", { cancelable: true }));
+
+  return promise;
+}, "error event is weird (return true cancels; many args) on WorkerGlobalScope, with a synthetic ErrorEvent");
+
+promise_test(t => {
+  const theError = { the: "error object" };
+
+  self.onerror = t.step_func(function (message, filename, lineno, colno, error) {
+    assert_equals(arguments.length, 5, "There must be exactly 5 arguments");
+    assert_equals(message, "message");
+    assert_equals(filename, "filename");
+    assert_equals(lineno, 1);
+    assert_equals(colno, 2);
+    assert_equals(error, theError);
+    return true;
+  });
+
+  const eventWatcher = new EventWatcher(t, self, "error");
+  const promise = eventWatcher.wait_for("error");
+
+  self.dispatchEvent(new ErrorEvent("error", {
+    message: "message",
+    filename: "filename",
+    lineno: 1,
+    colno: 2,
+    error: theError
+  }));
+
+  return promise;
+}, "error event has the right 5 args on WorkerGlobalScope, with a synthetic ErrorEvent");
+
+done();