tests/mozilla/js1_5/Array/regress-178722.js

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  14 * The Original Code is JavaScript Engine testing utilities.
  15 *
  16 * The Initial Developer of the Original Code is Netscape Communications Corp.
  17 * Portions created by the Initial Developer are Copyright (C) 2002
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  20 * Contributor(s): pschwartau@netscape.com
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  35 *
  36 *
  37 * Date:    06 November 2002
  38 * SUMMARY: arr.sort() should not output |undefined| when |arr| is empty
  39 * See http://bugzilla.mozilla.org/show_bug.cgi?id=178722
  40 *
  41 * ECMA-262 Ed.3: 15.4.4.11 Array.prototype.sort (comparefn)
  42 *
  43 * 1. Call the [[Get]] method of this object with argument "length".
  44 * 2. Call ToUint32(Result(1)).
  45 * 3. Perform an implementation-dependent sequence of calls to the [[Get]],
  46 *    [[Put]], and [[Delete]] methods of this object, etc. etc.
  47 * 4. Return this object.
  48 *
  49 *
  50 * Note that sort() is done in-place on |arr|. In other words, sort() is a
  51 * "destructive" method rather than a "functional" method. The return value
  52 * of |arr.sort()| and |arr| are the same object.
  53 *
  54 * If |arr| is an empty array, the return value of |arr.sort()| should be
  55 * an empty array, not the value |undefined| as was occurring in bug 178722.
  56 *
  57 */
  58 //-----------------------------------------------------------------------------
  59 var UBound = 0;
  60 var bug = 178722;
  61 var summary = 'arr.sort() should not output |undefined| when |arr| is empty';
  62 var status = '';
  63 var statusitems = [];
  64 var actual = '';
  65 var actualvalues = [];
  66 var expect= '';
  67 var expectedvalues = [];
  68 var arr;
  69
  70
  71 // create empty array or pseudo-array objects in various ways
  72 var arr1 = Array();
  73 var arr2 = new Array();
  74 var arr3 = [];
  75 var arr4 = [1];
  76 arr4.pop();
  77 function f () {return arguments};
  78 var arr5 = f();
  79 arr5.__proto__ = Array.prototype;
  80
  81
  82 status = inSection(1);
  83 arr = arr1.sort();
  84 actual = arr instanceof Array && arr.length === 0 && arr === arr1;
  85 expect = true;
  86 addThis();
  87
  88 status = inSection(2);
  89 arr = arr2.sort();
  90 actual = arr instanceof Array && arr.length === 0 && arr === arr2;
  91 expect = true;
  92 addThis();
  93
  94 status = inSection(3);
  95 arr = arr3.sort();
  96 actual = arr instanceof Array && arr.length === 0 && arr === arr3;
  97 expect = true;
  98 addThis();
  99
 100 status = inSection(4);
 101 arr = arr4.sort();
 102 actual = arr instanceof Array && arr.length === 0 && arr === arr4;
 103 expect = true;
 104 addThis();
 105
 106 status = inSection(5);
 107 arr = arr5.sort();
 108 actual = arr instanceof Array && arr.length === 0 && arr === arr5;
 109 expect = true;
 110 addThis();
 111
 112
 113 // now do the same thing, with non-default sorting:
 114 function g() {return 1;}
 115
 116 status = inSection('1a');
 117 arr = arr1.sort(g);
 118 actual = arr instanceof Array && arr.length === 0 && arr === arr1;
 119 expect = true;
 120 addThis();
 121
 122 status = inSection('2a');
 123 arr = arr2.sort(g);
 124 actual = arr instanceof Array && arr.length === 0 && arr === arr2;
 125 expect = true;
 126 addThis();
 127
 128 status = inSection('3a');
 129 arr = arr3.sort(g);
 130 actual = arr instanceof Array && arr.length === 0 && arr === arr3;
 131 expect = true;
 132 addThis();
 133
 134 status = inSection('4a');
 135 arr = arr4.sort(g);
 136 actual = arr instanceof Array && arr.length === 0 && arr === arr4;
 137 expect = true;
 138 addThis();
 139
 140 status = inSection('5a');
 141 arr = arr5.sort(g);
 142 actual = arr instanceof Array && arr.length === 0 && arr === arr5;
 143 expect = true;
 144 addThis();
 145
 146
 147
 148 //-----------------------------------------------------------------------------
 149 test();
 150 //-----------------------------------------------------------------------------
 151
 152
 153
 154 function addThis()
 155 {
 156   statusitems[UBound] = status;
 157   actualvalues[UBound] = actual;
 158   expectedvalues[UBound] = expect;
 159   UBound++;
 160 }
 161
 162
 163 function test()
 164 {
 165   enterFunc('test');
 166   printBugNumber(bug);
 167   printStatus(summary);
 168
 169   for (var i=0; i<UBound; i++)
 170   {
 171     reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
 172   }
 173
 174   exitFunc ('test');
 175 }