1 // Copyright 2011 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
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.
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.
28 // Flags: --expose-natives-as=builtins
30 // Checks that all function properties of the builtin object that are actually
31 // constructors (recognized by having properties on their .prototype object),
32 // have only unconfigurable properties on the prototype, and the methods
33 // are also non-writable.
35 var names = Object.getOwnPropertyNames(builtins);
37 function isFunction(obj) {
38 return typeof obj == "function";
41 function isV8Native(name) {
42 return name == "GeneratorFunctionPrototype" ||
43 name == "SetIterator" ||
44 name == "MapIterator" ||
45 name == "ArrayIterator" ||
46 name == "StringIterator";
49 function checkConstructor(func, name) {
50 // A constructor is a function with a prototype and properties on the
51 // prototype object besides "constructor";
52 if (name.charAt(0) == "$") return;
53 if (typeof func.prototype != "object") return;
54 var propNames = Object.getOwnPropertyNames(func.prototype);
55 if (propNames.length == 0 ||
56 (propNames.length == 1 && propNames[0] == "constructor")) {
60 var proto_desc = Object.getOwnPropertyDescriptor(func, "prototype");
61 assertTrue(proto_desc.hasOwnProperty("value"), name);
62 assertFalse(proto_desc.writable, name);
63 assertFalse(proto_desc.configurable, name);
64 var prototype = proto_desc.value;
65 assertEquals(isV8Native(name) ? Object.prototype : null,
66 Object.getPrototypeOf(prototype),
68 for (var i = 0; i < propNames.length; i++) {
69 var propName = propNames[i];
70 if (propName == "constructor") continue;
71 if (isV8Native(name)) continue;
72 var testName = name + "-" + propName;
73 var propDesc = Object.getOwnPropertyDescriptor(prototype, propName);
74 assertTrue(propDesc.hasOwnProperty("value"), testName);
75 assertFalse(propDesc.configurable, testName);
76 if (isFunction(propDesc.value)) {
77 assertFalse(propDesc.writable, testName);
82 for (var i = 0; i < names.length; i++) {
84 var desc = Object.getOwnPropertyDescriptor(builtins, name);
85 assertTrue(desc.hasOwnProperty("value"));
86 var value = desc.value;
87 if (isFunction(value)) {
88 checkConstructor(value, name);