Migrated several tests from blink to V8 repository.

test/webkit/preventExtensions.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in the
+//     documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+description(
+"This test checks whether various seal/freeze/preventExtentions work on a regular object."
+);
+
+function obj()
+{
+    // Add an accessor property to check 'isFrozen' returns the correct result for objects with accessors.
+    return Object.defineProperty({ a: 1, b: 2 }, 'g', { get: function() { return "getter"; } });
+}
+
+function test(obj)
+{
+    obj.c =3;
+    obj.b =4;
+    delete obj.a;
+
+    var result = "";
+    for (key in obj)
+        result += ("(" + key + ":" + obj[key] + ")");
+    if (Object.isSealed(obj))
+        result += "S";
+    if (Object.isFrozen(obj))
+        result += "F";
+    if (Object.isExtensible(obj))
+        result += "E";
+    return result;
+}
+
+function seal(obj)
+{
+    Object.seal(obj);
+    return obj;
+}
+
+function freeze(obj)
+{
+    Object.freeze(obj);
+    return obj;
+}
+
+function preventExtensions(obj)
+{
+    Object.preventExtensions(obj);
+    return obj;
+}
+
+function inextensible(){}
+function sealed(){}
+function frozen(){};
+preventExtensions(inextensible);
+seal(sealed);
+freeze(frozen);
+new inextensible;
+new sealed;
+new frozen;
+inextensible.prototype.prototypeExists = true;
+sealed.prototype.prototypeExists = true;
+frozen.prototype.prototypeExists = true;
+
+shouldBeTrue("(new inextensible).prototypeExists");
+shouldBeTrue("(new sealed).prototypeExists");
+shouldBeTrue("(new frozen).prototypeExists");
+
+shouldBe('test(obj())', '"(b:4)(c:3)E"'); // extensible, can delete a, can modify b, and can add c
+shouldBe('test(preventExtensions(obj()))', '"(b:4)"'); // <nothing>, can delete a, can modify b, and CANNOT add c
+shouldBe('test(seal(obj()))', '"(a:1)(b:4)S"'); // sealed, CANNOT delete a, can modify b, and CANNOT add c
+shouldBe('test(freeze(obj()))', '"(a:1)(b:2)SF"'); // sealed and frozen, CANNOT delete a, CANNOT modify b, and CANNOT add c
+
+// check that we can preventExtensions on a host function.
+shouldBe('Object.preventExtensions(Math.sin)', 'Math.sin');
+
+shouldThrow('var o = {}; Object.preventExtensions(o); o.__proto__ = { newProp: "Should not see this" }; o.newProp;');
+shouldThrow('"use strict"; var o = {}; Object.preventExtensions(o); o.__proto__ = { newProp: "Should not see this" }; o.newProp;');
+
+// check that we can still access static properties on an object after calling preventExtensions.
+shouldBe('Object.preventExtensions(Math); Math.sqrt(4)', '2');
+
+// Should not be able to add properties to a preventExtensions array.
+shouldBeUndefined('var arr = Object.preventExtensions([]); arr[0] = 42; arr[0]');
+shouldBe('var arr = Object.preventExtensions([]); arr[0] = 42; arr.length', '0');
+// In strict mode, this throws.
+shouldThrow('"use strict"; var arr = Object.preventExtensions([]); arr[0] = 42; arr[0]');
+
+// A read-only property on the prototype should prevent a [[Put]] .
+function Constructor() {}
+Constructor.prototype.foo = 1;
+Object.freeze(Constructor.prototype);
+var obj = new Constructor();
+obj.foo = 2;
+shouldBe('obj.foo', '1');
+
+// Check that freezing a function works correctly.
+var func = freeze(function foo(){});
+shouldBeTrue('Object.isFrozen(func)')
+func.prototype = 42;
+shouldBeFalse('func.prototype === 42');
+shouldBeFalse('Object.getOwnPropertyDescriptor(func, "prototype").writable')
+
+// Check that freezing a strict function works correctly.
+var strictFunc = freeze(function foo(){ "use strict"; });
+shouldBeTrue('Object.isFrozen(strictFunc)')
+strictFunc.prototype = 42;
+shouldBeFalse('strictFunc.prototype === 42');
+shouldBeFalse('Object.getOwnPropertyDescriptor(strictFunc, "prototype").writable')
+
+// Check that freezing array objects works correctly.
+var array = freeze([0,1,2]);
+shouldBeTrue('Object.isFrozen(array)')
+array[0] = 3;
+shouldBe('array[0]', '0');
+shouldBeFalse('Object.getOwnPropertyDescriptor(array, "length").writable')
+
+// Check that freezing arguments objects works correctly.
+var args = freeze((function(){ return arguments; })(0,1,2));
+shouldBeTrue('Object.isFrozen(args)')
+args[0] = 3;
+shouldBe('args[0]', '0');
+shouldBeFalse('Object.getOwnPropertyDescriptor(args, "length").writable')
+shouldBeFalse('Object.getOwnPropertyDescriptor(args, "callee").writable')
+
+// Check that freeze still works if preventExtensions has been called on the object.
+function preventExtensionsFreezeIsFrozen(x)
+{
+    Object.preventExtensions(x);
+    Object.freeze(x);
+    return Object.isFrozen(x);
+}
+shouldBeTrue('preventExtensionsFreezeIsFrozen(function foo(){})')
+shouldBeTrue('preventExtensionsFreezeIsFrozen(function foo(){ "use strict"; })')
+shouldBeTrue('preventExtensionsFreezeIsFrozen([0,1,2])')
+shouldBeTrue('preventExtensionsFreezeIsFrozen((function(){ return arguments; })(0,1,2))')
+
+shouldBeFalse('Object.getOwnPropertyDescriptor(freeze({0:0}), 0).configurable');
+shouldBeFalse('Object.getOwnPropertyDescriptor(freeze({10000001:0}), 10000001).configurable');