text: // Copyright 2009 the Sputnik authors.  All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /**
  * @name: S15.5.4.15_A1_T8;
  * @section: 15.5.4.15;
  * @assertion: String.prototype.substring (start, end);
  * @description: Arguments are negative number and void 0, and instance is String(object), object have overrided toString function;
  */
  
  var __obj = {toString:function(){}};
  
  //////////////////////////////////////////////////////////////////////////////
  //CHECK#1
  if (String(__obj).substring(-4,void 0) !== "undefined") {
    $ERROR('#1: __obj = {toString:function(){}}; String(__obj).substring(-4,void 0) === "undefined". Actual: '+String(__obj).substring(-4,void 0) );
  }
  //
  //////////////////////////////////////////////////////////////////////////////
  