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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 // Test that the inline caches correctly detect that constant
     29 // functions on value prototypes change.
     30 
     31 function testString() {
     32   function f(s, expected) {
     33     var result = s.toString();
     34     assertEquals(expected, result);
     35   };
     36 
     37   for (var i = 0; i < 10; i++) {
     38     var s = String.fromCharCode(i);
     39     f(s, s);
     40   }
     41 
     42   String.prototype.toString = function() { return "ostehaps"; };
     43 
     44   for (var i = 0; i < 10; i++) {
     45     var s = String.fromCharCode(i);
     46     f(s, "ostehaps");
     47   }
     48 }
     49 
     50 testString();
     51 
     52 
     53 function testNumber() {
     54   Number.prototype.toString = function() { return 0; };
     55 
     56   function f(n, expected) {
     57     var result = n.toString();
     58     assertEquals(expected, result);
     59   };
     60 
     61   for (var i = 0; i < 10; i++) {
     62     f(i, 0);
     63   }
     64 
     65   Number.prototype.toString = function() { return 42; };
     66 
     67   for (var i = 0; i < 10; i++) {
     68     f(i, 42);
     69   }
     70 }
     71 
     72 testNumber();
     73 
     74 
     75 function testBoolean() {
     76   Boolean.prototype.toString = function() { return 0; };
     77 
     78   function f(b, expected) {
     79     var result = b.toString();
     80     assertEquals(expected, result);
     81   };
     82 
     83   for (var i = 0; i < 10; i++) {
     84     f((i % 2 == 0), 0);
     85   }
     86 
     87   Boolean.prototype.toString = function() { return 42; };
     88 
     89   for (var i = 0; i < 10; i++) {
     90     f((i % 2 == 0), 42);
     91   }
     92 }
     93 
     94 testBoolean();
     95