Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/js/src/tests/test262/built-ins/WeakSet/prototype/add/returns-this-when-ignoring-duplicate.js b/js/src/tests/test262/built-ins/WeakSet/prototype/add/returns-this-when-ignoring-duplicate.js
new file mode 100644
index 0000000000..0757a57d08
--- /dev/null
+++ b/js/src/tests/test262/built-ins/WeakSet/prototype/add/returns-this-when-ignoring-duplicate.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-weakset.prototype.add
+description: Returns `this` when new value is duplicate.
+info: |
+  WeakSet.prototype.add ( value )
+
+  1. Let S be this value.
+  ...
+  6. Repeat for each e that is an element of entries,
+    a. If e is not empty and SameValueZero(e, value) is true, then
+    i. Return S.
+  ...
+---*/
+
+var foo = {};
+var s = new WeakSet([foo]);
+
+assert.sameValue(s.add(foo), s, '`s.add(foo)` returns `s`');
+
+reportCompare(0, 0);