michael@0: // Copyright 2009 the Sputnik authors.  All rights reserved.
michael@0: // This code is governed by the BSD license found in the LICENSE file.
michael@0: 
michael@0: /**
michael@0:  * Empty string, 0, false are all equal (==) to each other, since they all evaluate to 0
michael@0:  *
michael@0:  * @path ch08/8.4/S8.4_A8.js
michael@0:  * @description Compare empty string with undefined, null, 0 and false
michael@0:  */
michael@0: 
michael@0: var str='';
michael@0: 
michael@0: ////////////////////////////////////////////////////////////
michael@0: // CHECK#1
michael@0: if (str == undefined){
michael@0:   $ERROR('#1: Empty string and undefined are not equal (!=) to each other');
michael@0: }
michael@0: //
michael@0: /////////////////////////////////////////////////////////////
michael@0: 
michael@0: ////////////////////////////////////////////////////////////
michael@0: // CHECK#2
michael@0: if (str == null){
michael@0:   $ERROR('#1: Empty string and Null are not equal (!=) to each other');
michael@0: }
michael@0: //
michael@0: /////////////////////////////////////////////////////////////
michael@0: 
michael@0: ////////////////////////////////////////////////////////////
michael@0: // CHECK#3
michael@0: if (str != 0){
michael@0:   $ERROR('#3: Empty string and 0 are equal (==) to each other, since they all evaluate to 0');
michael@0: }
michael@0: //
michael@0: /////////////////////////////////////////////////////////////
michael@0: 
michael@0: ////////////////////////////////////////////////////////////
michael@0: // CHECK#4
michael@0: if (str != false){
michael@0:   $ERROR('#4: Empty string and false are equal (==) to each other, since they all evaluate to 0');
michael@0: }
michael@0: //
michael@0: /////////////////////////////////////////////////////////////
michael@0: