1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/charAt/pos-coerce-err.js b/js/src/tests/test262/built-ins/String/prototype/charAt/pos-coerce-err.js
new file mode 100644
index 0000000000..a2ea4dac46
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/charAt/pos-coerce-err.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-string.prototype.charat
+description: Error when attempting to coerce providec "pos" to a Number
+info: |
+  [...]
+  3. Let position be ? ToInteger(pos).
+  [...]
+
+  7.1.4 ToInteger
+
+  1. Let number be ? ToNumber(argument).
+---*/
+
+var noCoerce = Object.create(null);
+
+assert.throws(TypeError, function() {
+  ''.charAt(noCoerce);
+});
+
+reportCompare(0, 0);