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// WeakSet surfaces
var desc = Object.getOwnPropertyDescriptor(this, "WeakSet");
assertEq(desc.enumerable, false);
assertEq(desc.configurable, true);
assertEq(desc.writable, true);
assertEq(typeof WeakSet, 'function');
assertEq(Object.keys(WeakSet).length, 0);
assertEq(WeakSet.length, 0);
assertEq(WeakSet.name, "WeakSet");
assertEq(Object.getPrototypeOf(WeakSet.prototype), Object.prototype);
assertEq(Object.prototype.toString.call(WeakSet.prototype), "[object WeakSet]");
assertEq(Object.prototype.toString.call(new WeakSet), "[object WeakSet]");
assertEq(Object.keys(WeakSet.prototype).length, 0);
assertEq(WeakSet.prototype.constructor, WeakSet);
function checkMethod(name, arity) {
var desc = Object.getOwnPropertyDescriptor(WeakSet.prototype, name);
assertEq(desc.enumerable, false);
assertEq(desc.configurable, true);
assertEq(desc.writable, true);
assertEq(typeof desc.value, 'function');
assertEq(desc.value.name, name);
assertEq(desc.value.length, arity);
}
checkMethod("has", 1);
checkMethod("add", 1);
checkMethod("delete", 1);
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