| // WeakMap surfaces |
| |
| var desc = Object.getOwnPropertyDescriptor(this, "WeakMap"); |
| assertEq(desc.enumerable, false); |
| assertEq(desc.configurable, true); |
| assertEq(desc.writable, true); |
| |
| assertEq(typeof WeakMap, 'function'); |
| assertEq(Object.keys(WeakMap).length, 0); |
| assertEq(WeakMap.length, 0); |
| assertEq(WeakMap.name, "WeakMap"); |
| |
| assertEq(Object.getPrototypeOf(WeakMap.prototype), Object.prototype); |
| assertEq(Object.prototype.toString.call(WeakMap.prototype), "[object Object]"); |
| assertEq(Object.prototype.toString.call(new WeakMap()), "[object WeakMap]"); |
| assertEq(Object.keys(WeakMap.prototype).join(), ""); |
| assertEq(WeakMap.prototype.constructor, WeakMap); |
| |
| function checkMethod(name, arity) { |
| var desc = Object.getOwnPropertyDescriptor(WeakMap.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("get", 1); |
| checkMethod("has", 1); |
| checkMethod("set", 2); |
| checkMethod("delete", 1); |
| checkMethod("clear", 0); |