text: // Copyright 2009 the Sputnik authors.  All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /**
   * @name: S11.9.2_A4.1_T1;
   * @section: 11.9.2, 11.9.3;
   * @assertion: If x or y is NaN, return true;
   * @description: x is NaN;
  */
  
  //CHECK#1
  if ((Number.NaN != true) !== true) {
    $ERROR('#1: (NaN != true) === true');
  }
  
  //CHECK#2
  if ((Number.NaN != 1) !== true) {
    $ERROR('#2: (NaN != 1) === true');
  }
  
  //CHECK#3
  if ((Number.NaN != Number.NaN) !== true) {
    $ERROR('#3: (NaN != NaN) === true');
  }
  
  //CHECK#4
  if ((Number.NaN != Number.POSITIVE_INFINITY) !== true) {
    $ERROR('#4: (NaN != +Infinity) === true');
  }
  
  //CHECK#5
  if ((Number.NaN != Number.NEGATIVE_INFINITY) !== true) {
    $ERROR('#5: (NaN != -Infinity) === true');
  }
  
  //CHECK#6
  if ((Number.NaN != Number.MAX_VALUE) !== true) {
    $ERROR('#6: (NaN != Number.MAX_VALUE) === true');
  }
  
  //CHECK#7
  if ((Number.NaN != Number.MIN_VALUE) !== true) {
    $ERROR('#7: (NaN != Number.MIN_VALUE) === true');
  }
  
  //CHECK#8
  if ((Number.NaN != "string") !== true) {
    $ERROR('#8: (NaN != "string") === true');
  }
  
  //CHECK#9
  if ((Number.NaN != new Object()) !== true) {
    $ERROR('#9: (NaN != new Object()) === true');
  }
  
  