1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/non262/Tuple/prototype/indexOf/fromIndex-object.js b/js/src/tests/non262/Tuple/prototype/indexOf/fromIndex-object.js
new file mode 100644
index 0000000000..cb1d74ddf8
--- /dev/null
+++ b/js/src/tests/non262/Tuple/prototype/indexOf/fromIndex-object.js
@@ -0,0 +1,24 @@
+// |reftest| skip-if(!this.hasOwnProperty("Tuple"))
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    Tuple.prototype.indexOf - value of 'fromIndex' is an Object, which
+    has an own toString method
+---*/
+
+// objects inherit the default valueOf() method from Object
+// that simply returns itself. Since the default valueOf() method
+// does not return a primitive value, ES next tries to convert the object
+// to a number by calling its toString() method and converting the
+// resulting string to a number.
+var fromIndex = {
+  toString: function() {
+    return '1';
+  }
+};
+
+assertEq(#[0, true].indexOf(true, fromIndex), 1, '#[0, true].indexOf(true, fromIndex)');
+
+reportCompare(0, 0);