1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Set/prototype/add/will-not-add-duplicate-entry-normalizes-zero.js b/js/src/tests/test262/built-ins/Set/prototype/add/will-not-add-duplicate-entry-normalizes-zero.js
new file mode 100644
index 0000000000..9cc7167351
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Set/prototype/add/will-not-add-duplicate-entry-normalizes-zero.js
@@ -0,0 +1,31 @@
+// 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-set.prototype.add
+description: >
+    Set.prototype.add ( value )
+
+    ...
+    4. Let entries be the List that is the value of S’s [[SetData]] internal slot.
+    5. 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.
+    6. If value is −0, let value be +0.
+    7. Append value as the last element of entries.
+    ...
+
+---*/
+
+var s = new Set([-0]);
+
+assert.sameValue(s.size, 1, "The value of `s.size` is `1`");
+
+s.add(-0);
+
+assert.sameValue(s.size, 1, "The value of `s.size` is `1`, after executing `s.add(-0)`");
+
+s.add(0);
+
+assert.sameValue(s.size, 1, "The value of `s.size` is `1`, after executing `s.add(0)`");
+
+reportCompare(0, 0);