1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/codePointAt/returns-undefined-on-position-less-than-zero.js b/js/src/tests/test262/built-ins/String/prototype/codePointAt/returns-undefined-on-position-less-than-zero.js
new file mode 100644
index 0000000000..087909a08e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/codePointAt/returns-undefined-on-position-less-than-zero.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.
+/*---
+es6id: 21.1.3.3
+description: >
+  If pos < size, return undefined
+info: |
+  21.1.3.3 String.prototype.codePointAt ( pos )
+
+  1. Let O be RequireObjectCoercible(this value).
+  2. Let S be ToString(O).
+  3. ReturnIfAbrupt(S).
+  4. Let position be ToInteger(pos).
+  5. ReturnIfAbrupt(position).
+  6. Let size be the number of elements in S.
+  7. If position < 0 or position ≥ size, return undefined.
+---*/
+
+assert.sameValue('abc'.codePointAt(-1), undefined);
+assert.sameValue('abc'.codePointAt(-Infinity), undefined);
+
+reportCompare(0, 0);