text: // Copyright 2009 the Sputnik authors.  All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /**
  * @name: S15.5.4.6_A1_T5;
  * @section: 15.5.4.6;
  * @assertion: String.prototype.concat([,[...]]);
  * @description: Call concat([,[...]]) function with null argument of function object;
  */
  
  //////////////////////////////////////////////////////////////////////////////
  //CHECK#1
  //since ToString(null) evaluates to "null" concat(null) evaluates to concat("null")
  if (function(){return "lego"}().concat(null) !== "legonull") {
    $ERROR('#1: function(){return "lego"}().concat(null) === "legonull". Actual: '+function(){return "lego"}().concat(null) ); 
  }
  //
  //////////////////////////////////////////////////////////////////////////////
  