1 files changed, 16 insertions, 0 deletions
diff --git a/dom/ipc/tests/JSWindowActor/browser_registerWindowActor.js b/dom/ipc/tests/JSWindowActor/browser_registerWindowActor.js
new file mode 100644
index 0000000000..edaa99d2ed
--- /dev/null
+++ b/dom/ipc/tests/JSWindowActor/browser_registerWindowActor.js
@@ -0,0 +1,16 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+declTest("double register", {
+  async test(_browser, _window, fileExt) {
+    SimpleTest.doesThrow(
+      () =>
+        ChromeUtils.registerWindowActor(
+          "TestWindow",
+          windowActorOptions[fileExt]
+        ),
+      "Should throw if register has duplicate name."
+    );
+  },
+});