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      1 // Copyright 2009 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 // Test that getters can be defined and called with an index as a parameter.
     29 
     30 var o = {};
     31 o.x = 42;
     32 o.__defineGetter__('0', function() { return o.x; });
     33 assertEquals(o.x, o[0]);
     34 assertEquals(o.x, o.__lookupGetter__('0')());
     35 
     36 o.__defineSetter__('0', function(y) { o.x = y; });
     37 assertEquals(o.x, o[0]);
     38 assertEquals(o.x, o.__lookupGetter__('0')());
     39 o[0] = 21;
     40 assertEquals(21, o.x);
     41 o.__lookupSetter__(0)(7);
     42 assertEquals(7, o.x);
     43 
     44 function Pair(x, y) {
     45   this.x = x;
     46   this.y = y;
     47 };
     48 Pair.prototype.__defineGetter__('0', function() { return this.x; });
     49 Pair.prototype.__defineGetter__('1', function() { return this.y; });
     50 Pair.prototype.__defineSetter__('0', function(x) { this.x = x; });
     51 Pair.prototype.__defineSetter__('1', function(y) { this.y = y; });
     52 
     53 var p = new Pair(2, 3);
     54 assertEquals(2, p[0]);
     55 assertEquals(3, p[1]);
     56 p.x = 7;
     57 p[1] = 8;
     58 assertEquals(7, p[0]);
     59 assertEquals(7, p.x);
     60 assertEquals(8, p[1]);
     61 assertEquals(8, p.y);
     62 
     63 
     64 // Testing that a defined getter doesn't get lost due to inline caching.
     65 var expected = {};
     66 var actual = {};
     67 for (var i = 0; i < 10; i++) {
     68   expected[i] = actual[i] = i;
     69 }
     70 function testArray() {
     71   for (var i = 0; i < 10; i++) {
     72     assertEquals(expected[i], actual[i]);
     73   }
     74 }
     75 actual[1000000] = -1;
     76 testArray();
     77 testArray();
     78 actual.__defineGetter__('0', function() { return expected[0]; });
     79 expected[0] = 42;
     80 testArray();
     81 expected[0] = 111;
     82 testArray();
     83 
     84 // Using a setter where only a getter is defined throws an exception.
     85 var q = {};
     86 q.__defineGetter__('0', function() { return 42; });
     87 assertThrows('q[0] = 7');
     88 
     89 // Using a getter where only a setter is defined returns undefined.
     90 var q1 = {};
     91 q1.__defineSetter__('0', function() {q1.b = 17;});
     92 assertEquals(q1[0], undefined);
     93 // Setter works
     94 q1[0] = 3;
     95 assertEquals(q1[0], undefined);
     96 assertEquals(q1.b, 17);
     97 
     98 // Complex case of using an undefined getter.
     99 // From http://code.google.com/p/v8/issues/detail?id=298
    100 // Reported by nth10sd.
    101 
    102 a = function() {};
    103 __defineSetter__("0", function() {});
    104 if (a |= '') {};
    105 assertThrows('this[a].__parent__');
    106 assertEquals(a, 0);
    107 assertEquals(this[a], undefined);
    108