test: add GC test for disabled AsyncLocalStorage

PR-URL: https://github.com/nodejs/node/pull/31995
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
Reviewed-By: Vladimir de Turckheim <vlad2t@hotmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

test/async-hooks/test-async-local-storage-gcable.js

@@ -0,0 +1,20 @@
+'use strict';
+// Flags: --expose_gc
+
+// This test ensures that AsyncLocalStorage gets gced once it was disabled
+// and no strong references remain in userland.
+
+const common = require('../common');
+const { AsyncLocalStorage } = require('async_hooks');
+const onGC = require('../common/ongc');
+
+let asyncLocalStorage = new AsyncLocalStorage();
+
+asyncLocalStorage.runSyncAndReturn({}, () => {
+  asyncLocalStorage.disable();
+
+  onGC(asyncLocalStorage, { ongc: common.mustCall() });
+});
+
+asyncLocalStorage = null;
+global.gc();