| // 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 Object]"); |
| 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); |
| checkMethod("clear", 0); |