1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/isNaN/toprimitive-result-is-object-throws.js b/js/src/tests/test262/built-ins/isNaN/toprimitive-result-is-object-throws.js
new file mode 100644
index 0000000000..041a64e11f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/isNaN/toprimitive-result-is-object-throws.js
@@ -0,0 +1,33 @@
+// 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-isnan-number
+description: >
+  Throws a TypeError if the result of calling number.@@toPrimitive is an Object
+info: |
+  isNaN (number)
+
+  1. Let num be ? ToNumber(number).
+
+  ToPrimitive ( input [ , PreferredType ] )
+
+  [...]
+  4. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
+  5. If exoticToPrim is not undefined, then
+    a. Let result be ? Call(exoticToPrim, input, « hint »).
+    b. If Type(result) is not Object, return result.
+    c. Throw a TypeError exception.
+features: [Symbol.toPrimitive]
+---*/
+
+var obj = {};
+obj[Symbol.toPrimitive] = function() {
+  return [42];
+};
+
+assert.throws(TypeError, function() {
+  isNaN(obj);
+});
+
+reportCompare(0, 0);