WeakSet-surface.js

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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);