1 files changed, 32 insertions, 0 deletions
diff --git a/devtools/shared/tests/xpcshell/test_eventemitter_destroy.js b/devtools/shared/tests/xpcshell/test_eventemitter_destroy.js
new file mode 100644
index 0000000000..715dd1c466
--- /dev/null
+++ b/devtools/shared/tests/xpcshell/test_eventemitter_destroy.js
@@ -0,0 +1,32 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+add_task(function () {
+  const { DevToolsLoader, require } = ChromeUtils.importESModule(
+    "resource://devtools/shared/loader/Loader.sys.mjs"
+  );
+
+  // Force-load the module once in the global loader to avoid Bug 1622718.
+  require("resource://devtools/shared/event-emitter.js");
+
+  const emitterRef = (function () {
+    const loader = new DevToolsLoader();
+
+    const ref = Cu.getWeakReference(
+      loader.require("resource://devtools/shared/event-emitter.js")
+    );
+
+    loader.destroy();
+    return ref;
+  })();
+
+  Cu.forceGC();
+  Cu.forceCC();
+  Cu.forceGC();
+  Cu.forceCC();
+
+  Assert.ok(!emitterRef.get(), "weakref has been cleared by gc");
+});