1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/WeakSet/prototype/delete/delete-symbol-entry.js b/js/src/tests/test262/built-ins/WeakSet/prototype/delete/delete-symbol-entry.js
new file mode 100644
index 0000000000..f4f81bb4f2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/WeakSet/prototype/delete/delete-symbol-entry.js
@@ -0,0 +1,34 @@
+// |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.delete
+description: >
+  Delete an entry that is a Symbol
+info: |
+  WeakSet.prototype.delete ( _value_ )
+  4. Let _entries_ be the List that is _S_.[[WeakSetData]].
+  5. For each element _e_ of _entries_, do
+    a. If _e_ is not ~empty~ and SameValue(_e_, _value_) is *true*, then
+      i. Replace the element of _entries_ whose value is _e_ with an element
+        whose value is ~empty~.
+      ii. Return *true*.
+features: [Symbol, WeakSet, symbols-as-weakmap-keys]
+---*/
+
+var foo = Symbol('a description');
+var bar = Symbol('a description');
+var s = new WeakSet();
+
+s.add(foo);
+s.add(bar);
+s.add(Symbol.hasInstance);
+
+assert.sameValue(s.delete(foo), true, 'Returns true for regular symbol');
+assert(!s.has(foo), 'Regular symbol is removed from set');
+assert(s.has(bar), 'Symbols with the same description are not aliased to each other');
+
+assert.sameValue(s.delete(Symbol.hasInstance), true, 'Returns true for well-known symbol');
+assert(!s.has(Symbol.hasInstance), 'Well-known symbol is removed from set');
+
+reportCompare(0, 0);