Home | History | Annotate | Download | only in harmony 
      1 // Copyright 2013 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 // Flags: --harmony-proxies --harmony-symbols
     29 
     30 
     31 // Helper.
     32 
     33 function TestWithProxies(test, x, y, z) {
     34   test(Proxy.create, x, y, z)
     35   test(function(h) {return Proxy.createFunction(h, function() {})}, x, y, z)
     36 }
     37 
     38 
     39 // No symbols should leak to proxy traps.
     40 
     41 function TestNoSymbolsToTrap(handler) {
     42   TestWithProxies(TestNoSymbolsToTrap2, handler)
     43 }
     44 
     45 function TestNoSymbolsToTrap2(create, handler) {
     46   var p = create(handler)
     47   var o = Object.create(p)
     48   var symbol = Symbol("secret")
     49 
     50   assertFalse(symbol in p)
     51   assertFalse(symbol in o)
     52   assertEquals(undefined, p[symbol])
     53   assertEquals(undefined, o[symbol])
     54   assertEquals(47, p[symbol] = 47)
     55   assertEquals(47, o[symbol] = 47)
     56   assertFalse(delete p[symbol])
     57   assertTrue(delete o[symbol])
     58   assertTrue(delete o[symbol])
     59   assertFalse({}.hasOwnProperty.call(p, symbol))
     60   assertFalse({}.hasOwnProperty.call(o, symbol))
     61   assertEquals(undefined, Object.getOwnPropertyDescriptor(p, symbol))
     62   assertEquals(undefined, Object.getOwnPropertyDescriptor(o, symbol))
     63 }
     64 
     65 
     66 TestNoSymbolsToTrap({
     67   has: assertUnreachable,
     68   hasOwn: assertUnreachable,
     69   get: assertUnreachable,
     70   set: assertUnreachable,
     71   delete: assertUnreachable,
     72   getPropertyDescriptor: assertUnreachable,
     73   getOwnPropertyDescriptor: assertUnreachable,
     74   defineProperty: assertUnreachable
     75 })
     76 
     77 
     78 // All symbols returned from proxy traps should be filtered.
     79 
     80 function TestNoSymbolsFromTrap(handler) {
     81   TestWithProxies(TestNoSymbolsFromTrap2, handler)
     82 }
     83 
     84 function TestNoSymbolsFromTrap2(create, handler) {
     85   var p = create(handler)
     86   var o = Object.create(p)
     87 
     88   assertEquals(0, Object.keys(p).length)
     89   assertEquals(0, Object.keys(o).length)
     90   assertEquals(0, Object.getOwnPropertyNames(p).length)
     91   assertEquals(0, Object.getOwnPropertyNames(o).length)
     92   for (var n in p) assertUnreachable()
     93   for (var n in o) assertUnreachable()
     94 }
     95 
     96 
     97 function MakeSymbolArray() {
     98   return [Symbol(), Symbol("a")]
     99 }
    100 
    101 TestNoSymbolsFromTrap({
    102   enumerate: MakeSymbolArray,
    103   keys: MakeSymbolArray,
    104   getPropertyNames: MakeSymbolArray,
    105   getOwnPropertyNames: MakeSymbolArray
    106 })
    107