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js/src/tests/js1_8_5/extensions/mutable-proto-special-form.js@129ffea94266 (annotated)

js/src/tests/js1_8_5/extensions/mutable-proto-special-form.js

Sat, 03 Jan 2015 20:18:00 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Sat, 03 Jan 2015 20:18:00 +0100

branch

TOR_BUG_3246

changeset 7

129ffea94266

permissions

-rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

michael@0	1	// Any copyright is dedicated to the Public Domain.
michael@0	2	// http://creativecommons.org/licenses/publicdomain/
michael@0	3
michael@0	4	//-----------------------------------------------------------------------------
michael@0	5	var BUGNUMBER = 948583;
michael@0	6	var summary =
michael@0	7	"Make __proto__ in object literals a special form not influenced by " +
michael@0	8	"|Object.prototype|";
michael@0	9
michael@0	10	print(BUGNUMBER + ": " + summary);
michael@0	11
michael@0	12	/**************
michael@0	13	* BEGIN TEST *
michael@0	14	**************/
michael@0	15
michael@0	16	var passed = true;
michael@0	17
michael@0	18	function performProtoTests(msg)
michael@0	19	{
michael@0	20	print("Testing " + msg);
michael@0	21	assertEq(passed, true, "passed wrong at start of test set");
michael@0	22
michael@0	23	assertEq(Object.getPrototypeOf({ __proto__: null }), null);
michael@0	24	assertEq(Object.getPrototypeOf({ __proto__: undefined }), Object.prototype);
michael@0	25	assertEq(Object.getPrototypeOf({ __proto__: 17 }), Object.prototype);
michael@0	26
michael@0	27	var obj = {};
michael@0	28	assertEq(Object.getPrototypeOf({ __proto__: obj }), obj);
michael@0	29
michael@0	30	assertEq(passed, true, "passed wrong at end of test set");
michael@0	31	print("Tests of " + msg + " passed!");
michael@0	32	}
michael@0	33
michael@0	34	function poisonProto(obj)
michael@0	35	{
michael@0	36	Object.defineProperty(obj, "__proto__",
michael@0	37	{
michael@0	38	configurable: true,
michael@0	39	enumerable: true,
michael@0	40	set: function(v) { passed = false; },
michael@0	41	});
michael@0	42	}
michael@0	43
michael@0	44	performProtoTests("initial behavior");
michael@0	45
michael@0	46	var desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
michael@0	47	var setProto = desc.set;
michael@0	48	delete Object.prototype.__proto__;
michael@0	49
michael@0	50	performProtoTests("behavior after Object.prototype.__proto__ deletion");
michael@0	51
michael@0	52	Object.defineProperty(Object.prototype, "__proto__",
michael@0	53	{
michael@0	54	configurable: true,
michael@0	55	enumerable: false,
michael@0	56	set: function(v) { passed = false; },
michael@0	57	});
michael@0	58
michael@0	59	performProtoTests("behavior after making Object.prototype.__proto__ a " +
michael@0	60	"custom setter");
michael@0	61
michael@0	62	Object.defineProperty(Object.prototype, "__proto__", { set: undefined });
michael@0	63
michael@0	64	performProtoTests("behavior after making Object.prototype.__proto__'s " +
michael@0	65	"[[Set]] === undefined");
michael@0	66
michael@0	67
michael@0	68	var superProto = Object.create(null);
michael@0	69	poisonProto(superProto);
michael@0	70	setProto.call(Object.prototype, superProto);
michael@0	71
michael@0	72	performProtoTests("behavior after mutating Object.prototype.[[Prototype]]");
michael@0	73
michael@0	74	// Note: The handler below will have to be updated to exempt a scriptable
michael@0	75	// getPrototypeOf trap (to instead consult the target whose [[Prototype]]
michael@0	76	// is safely non-recursive), if we ever implement one.
michael@0	77	var death = new Proxy(Object.create(null),
michael@0	78	new Proxy({}, { get: function() { passed = false; } }));
michael@0	79
michael@0	80	setProto.call(Object.prototype, death);
michael@0	81
michael@0	82	performProtoTests("behavior after making Object.prototype.[[Prototype]] a " +
michael@0	83	"proxy that throws for any access");
michael@0	84
michael@0	85
michael@0	86	if (typeof reportCompare === "function")
michael@0	87	reportCompare(true, true);
michael@0	88
michael@0	89	print("Tests complete");