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      1 // Copyright 2008 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // ----------------
     29 // Check fast objects
     30 
     31 var o = { };
     32 assertFalse(0 in o);
     33 assertFalse('x' in o);
     34 assertFalse('y' in o);
     35 assertTrue('toString' in o, "toString");
     36 
     37 var o = { x: 12 };
     38 assertFalse(0 in o);
     39 assertTrue('x' in o);
     40 assertFalse('y' in o);
     41 assertTrue('toString' in o, "toString");
     42 
     43 var o = { x: 12, y: 15 };
     44 assertFalse(0 in o);
     45 assertTrue('x' in o);
     46 assertTrue('y' in o);
     47 assertTrue('toString' in o, "toString");
     48 
     49 
     50 // ----------------
     51 // Check dense arrays
     52 
     53 var a = [ ];
     54 assertFalse(0 in a);
     55 assertFalse(1 in a);
     56 assertFalse('0' in a);
     57 assertFalse('1' in a);
     58 assertTrue('toString' in a, "toString");
     59 
     60 var a = [ 1 ];
     61 assertTrue(0 in a);
     62 assertFalse(1 in a);
     63 assertTrue('0' in a);
     64 assertFalse('1' in a);
     65 assertTrue('toString' in a, "toString");
     66 
     67 var a = [ 1, 2 ];
     68 assertTrue(0 in a);
     69 assertTrue(1 in a);
     70 assertTrue('0' in a);
     71 assertTrue('1' in a);
     72 assertTrue('toString' in a, "toString");
     73 
     74 var a = [ 1, 2 ];
     75 assertFalse(0.001 in a);
     76 assertTrue(-0 in a);
     77 assertTrue(+0 in a);
     78 assertFalse('0.0' in a);
     79 assertFalse('1.0' in a);
     80 assertFalse(NaN in a);
     81 assertFalse(Infinity in a);
     82 assertFalse(-Infinity in a);
     83 
     84 var a = [];
     85 a[1] = 2;
     86 assertFalse(0 in a);
     87 assertTrue(1 in a);
     88 assertFalse(2 in a);
     89 assertFalse('0' in a);
     90 assertTrue('1' in a);
     91 assertFalse('2' in a);
     92 assertTrue('toString' in a, "toString");
     93 
     94 
     95 // ----------------
     96 // Check dictionary ("normalized") objects
     97 
     98 var o = {};
     99 for (var i = 0x0020; i < 0x02ff; i += 2) {
    100   o['char:' + String.fromCharCode(i)] = i;
    101 }
    102 for (var i = 0x0020; i < 0x02ff; i += 2) {
    103   assertTrue('char:' + String.fromCharCode(i) in o);
    104   assertFalse('char:' + String.fromCharCode(i + 1) in o);
    105 }
    106 assertTrue('toString' in o, "toString");
    107 
    108 var o = {};
    109 o[Math.pow(2,30)-1] = 0;
    110 o[Math.pow(2,31)-1] = 0;
    111 o[1] = 0;
    112 assertFalse(0 in o);
    113 assertTrue(1 in o);
    114 assertFalse(2 in o);
    115 assertFalse(Math.pow(2,30)-2 in o);
    116 assertTrue(Math.pow(2,30)-1 in o);
    117 assertFalse(Math.pow(2,30)-0 in o);
    118 assertTrue(Math.pow(2,31)-1 in o);
    119 assertFalse(0.001 in o);
    120 assertFalse('0.0' in o);
    121 assertFalse('1.0' in o);
    122 assertFalse(NaN in o);
    123 assertFalse(Infinity in o);
    124 assertFalse(-Infinity in o);
    125 assertFalse(-0 in o);
    126 assertFalse(+0 in o);
    127 assertTrue('toString' in o, "toString");
    128 
    129 
    130 // ----------------
    131 // Check sparse arrays
    132 
    133 var a = [];
    134 a[Math.pow(2,30)-1] = 0;
    135 a[Math.pow(2,31)-1] = 0;
    136 a[1] = 0;
    137 assertFalse(0 in a, "0 in a");
    138 assertTrue(1 in a, "1 in a");
    139 assertFalse(2 in a, "2 in a");
    140 assertFalse(Math.pow(2,30)-2 in a, "Math.pow(2,30)-2 in a");
    141 assertTrue(Math.pow(2,30)-1 in a, "Math.pow(2,30)-1 in a");
    142 assertFalse(Math.pow(2,30)-0 in a, "Math.pow(2,30)-0 in a");
    143 assertTrue(Math.pow(2,31)-1 in a, "Math.pow(2,31)-1 in a");
    144 assertFalse(0.001 in a, "0.001 in a");
    145 assertFalse('0.0' in a,"'0.0' in a");
    146 assertFalse('1.0' in a,"'1.0' in a");
    147 assertFalse(NaN in a,"NaN in a");
    148 assertFalse(Infinity in a,"Infinity in a");
    149 assertFalse(-Infinity in a,"-Infinity in a");
    150 assertFalse(-0 in a,"-0 in a");
    151 assertFalse(+0 in a,"+0 in a");
    152 assertTrue('toString' in a, "toString");
    153 
    154 // -------------
    155 // Check negative indices in arrays.
    156 var a = [];
    157 assertFalse(-1 in a);
    158 a[-1] = 43;
    159 assertTrue(-1 in a);
    160