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
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: --expose-natives-as=builtins
29
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.
34
35var names = Object.getOwnPropertyNames(builtins);
36
37function isFunction(obj) {
38  return typeof obj == "function";
39}
40
41function checkConstructor(func, name) {
42  // A constructor is a function with a prototype and properties on the
43  // prototype object besides "constructor";
44  if (name.charAt(0) == "$") return;
45  if (typeof func.prototype != "object") return;
46  var propNames = Object.getOwnPropertyNames(func.prototype);
47  if (propNames.length == 0 ||
48      (propNames.length == 1 && propNames[0] == "constructor")) {
49    // Not a constructor.
50    return;
51  }
52  var proto_desc = Object.getOwnPropertyDescriptor(func, "prototype");
53  assertTrue(proto_desc.hasOwnProperty("value"), name);
54  assertFalse(proto_desc.writable, name);
55  assertFalse(proto_desc.configurable, name);
56  var prototype = proto_desc.value;
57  assertEquals(null, prototype.__proto__, name);
58  for (var i = 0; i < propNames.length; i++) {
59    var propName = propNames[i];
60    if (propName == "constructor") continue;
61    var testName = name + "-" + propName;
62    var propDesc = Object.getOwnPropertyDescriptor(prototype, propName);
63    assertTrue(propDesc.hasOwnProperty("value"), testName);
64    assertFalse(propDesc.configurable, testName);
65    if (isFunction(propDesc.value)) {
66      assertFalse(propDesc.writable, testName);
67    }
68  }
69}
70
71for (var i = 0; i < names.length; i++) {
72  var name = names[i];
73  var desc = Object.getOwnPropertyDescriptor(builtins, name);
74  assertTrue(desc.hasOwnProperty("value"));
75  var value = desc.value;
76  if (isFunction(value)) {
77    checkConstructor(value, name);
78  }
79}
80