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| 1 // Copyright 2008 the V8 project authors. All rights reserved. | 1 // Copyright 2008 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | 27 |
| 28 // Test that we can set function prototypes to non-object values. The | 28 // Test that we can set function prototypes to non-object values. The |
| 29 // prototype used for instances in that case should be the initial | 29 // prototype used for instances in that case should be the initial |
| 30 // object prototype. ECMA-262 13.2.2. | 30 // object prototype. ECMA-262 13.2.2. |
| 31 function TestNonObjectPrototype(value) { | 31 function TestNonObjectPrototype(value) { |
| 32 function F() {}; | 32 function F() {} |
| 33 F.prototype = value; | 33 F.prototype = value; |
| 34 var f = new F(); | 34 var f = new F(); |
| 35 assertEquals(value, F.prototype); | 35 assertEquals(value, F.prototype); |
| 36 assertEquals(Object.prototype, f.__proto__); | 36 assertEquals(Object.prototype, f.__proto__); |
| 37 } | 37 } |
| 38 | 38 |
| 39 var values = [123, "asdf", true]; | 39 var values = [123, "asdf", true]; |
| 40 | 40 |
| 41 values.forEach(TestNonObjectPrototype); | 41 values.forEach(TestNonObjectPrototype); |
| 42 | 42 |
| 43 | 43 |
| 44 // Test moving between non-object and object values. | 44 // Test moving between non-object and object values. |
| 45 function F() {}; | 45 function F() {} |
| 46 var f = new F(); | 46 var f = new F(); |
| 47 assertEquals(f.__proto__, F.prototype); | 47 assertEquals(f.__proto__, F.prototype); |
| 48 F.prototype = 42; | 48 F.prototype = 42; |
| 49 f = new F(); | 49 f = new F(); |
| 50 assertEquals(Object.prototype, f.__proto__); | 50 assertEquals(Object.prototype, f.__proto__); |
| 51 assertEquals(42, F.prototype); | 51 assertEquals(42, F.prototype); |
| 52 F.prototype = { a: 42 }; | 52 F.prototype = { a: 42 }; |
| 53 f = new F(); | 53 f = new F(); |
| 54 assertEquals(42, F.prototype.a); | 54 assertEquals(42, F.prototype.a); |
| 55 assertEquals(f.__proto__, F.prototype); | 55 assertEquals(f.__proto__, F.prototype); |
| 56 | 56 |
| 57 | 57 |
| 58 // Test that the fast case optimizations can handle non-functions, | 58 // Test that the fast case optimizations can handle non-functions, |
| 59 // functions with no prototypes (yet), non-object prototypes, | 59 // functions with no prototypes (yet), non-object prototypes, |
| 60 // functions without initial maps, and the fully initialized | 60 // functions without initial maps, and the fully initialized |
| 61 // functions. | 61 // functions. |
| 62 function GetPrototypeOf(f) { | 62 function GetPrototypeOf(f) { |
| 63 return f.prototype; | 63 return f.prototype; |
| 64 }; | 64 } |
| 65 | 65 |
| 66 // Seed the GetPrototypeOf function to enable the fast case | 66 // Seed the GetPrototypeOf function to enable the fast case |
| 67 // optimizations. | 67 // optimizations. |
| 68 var p = GetPrototypeOf(GetPrototypeOf); | 68 var p = GetPrototypeOf(GetPrototypeOf); |
| 69 | 69 |
| 70 // Check that getting the prototype of a tagged integer works. | 70 // Check that getting the prototype of a tagged integer works. |
| 71 assertTrue(typeof GetPrototypeOf(1) == 'undefined'); | 71 assertTrue(typeof GetPrototypeOf(1) == 'undefined'); |
| 72 | 72 |
| 73 function NoPrototypeYet() { } | 73 function NoPrototypeYet() { } |
| 74 var p = GetPrototypeOf(NoPrototypeYet); | 74 var p = GetPrototypeOf(NoPrototypeYet); |
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| 86 assertEquals(F.prototype, GetPrototypeOf(F)); | 86 assertEquals(F.prototype, GetPrototypeOf(F)); |
| 87 | 87 |
| 88 // Check that getting the prototype of a non-function works. This must | 88 // Check that getting the prototype of a non-function works. This must |
| 89 // be the last thing we do because this will clobber the optimizations | 89 // be the last thing we do because this will clobber the optimizations |
| 90 // in GetPrototypeOf and go to a monomorphic IC load instead. | 90 // in GetPrototypeOf and go to a monomorphic IC load instead. |
| 91 assertEquals(87, GetPrototypeOf({prototype:87})); | 91 assertEquals(87, GetPrototypeOf({prototype:87})); |
| 92 | 92 |
| 93 // Check the prototype is not enumerable, for compatibility with | 93 // Check the prototype is not enumerable, for compatibility with |
| 94 // safari. This is deliberately incompatible with ECMA262, 15.3.5.2. | 94 // safari. This is deliberately incompatible with ECMA262, 15.3.5.2. |
| 95 var foo = new Function("return x"); | 95 var foo = new Function("return x"); |
| 96 var result = "" | 96 var result = ""; |
| 97 for (var n in foo) result += n; | 97 for (var n in foo) result += n; |
| 98 assertEquals(result, ""); | 98 assertEquals(result, ""); |
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