JSTests/test262/test/built-ins/String/prototype/substring/S15.5.4.15_A1_T5.js

// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: String.prototype.substring (start, end)
es5id: 15.5.4.15_A1_T5
description: >
    Arguments are null and Function(), and instance is function
    object, that have overrided valueOf function
---*/

__func.valueOf=function(){return "gnulluna"};

Function.prototype.substring=String.prototype.substring;


//////////////////////////////////////////////////////////////////////////////
//CHECK#1
if (__func.substring(null, Function()) !== "") {
  $ERROR('#1: __func.valueOf=function(){return "gnulluna"}; Function.prototype.substring=String.prototype.substring; function __func(){}; __func.substring(null, Function()) === "". Actual: '+__func.substring(null, Function()) );
}
//
//////////////////////////////////////////////////////////////////////////////

function __func(){};