1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/WeakSet/prototype/add/adds-symbol-element.js b/js/src/tests/test262/built-ins/WeakSet/prototype/add/adds-symbol-element.js
new file mode 100644
index 0000000000..b56ba8ae80
--- /dev/null
+++ b/js/src/tests/test262/built-ins/WeakSet/prototype/add/adds-symbol-element.js
@@ -0,0 +1,27 @@
+// |reftest| shell-option(--enable-symbols-as-weakmap-keys) skip-if(release_or_beta||!xulRuntime.shell) -- symbols-as-weakmap-keys is not released yet, requires shell-options
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-weakset.prototype.add
+description: Adds a Symbol value.
+info: |
+  WeakSet.prototype.add ( _value_ )
+  6. Append _value_ as the last element of _entries_.
+features: [Symbol, WeakSet, symbols-as-weakmap-keys]
+---*/
+
+var s = new WeakSet();
+var foo = Symbol('a description');
+var bar = Symbol('a description');
+var baz = Symbol('a different description');
+
+s.add(foo);
+s.add(baz);
+s.add(Symbol.hasInstance);
+
+assert(s.has(foo), 'Regular symbol');
+assert(!s.has(bar), "Symbols with the same description don't alias each other");
+assert(s.has(baz), 'Regular symbol with different description');
+assert(s.has(Symbol.hasInstance), 'Well-known symbol');
+
+reportCompare(0, 0);