| // Copyright 2012 Mozilla Corporation. All rights reserved. |
| // This code is governed by the license found in the LICENSE file. |
| |
| /*--- |
| es5id: 12.3.2_1_a_L15 |
| description: > |
| Tests that the function returned by |
| Intl.DateTimeFormat.prototype.format meets the requirements for |
| built-in objects defined by the introduction of chapter 17 of the |
| ECMAScript Language Specification. |
| author: Norbert Lindenberg |
| includes: [isConstructor.js] |
| features: [Reflect.construct] |
| ---*/ |
| |
| var formatFn = new Intl.DateTimeFormat().format; |
| |
| assert.sameValue(Object.prototype.toString.call(formatFn), "[object Function]", |
| "The [[Class]] internal property of a built-in function must be " + |
| "\"Function\"."); |
| |
| assert(Object.isExtensible(formatFn), |
| "Built-in objects must be extensible."); |
| |
| assert.sameValue(Object.getPrototypeOf(formatFn), Function.prototype); |
| |
| assert.sameValue(formatFn.hasOwnProperty("prototype"), false, |
| "Built-in functions that aren't constructors must not have a prototype property."); |
| |
| assert.sameValue(isConstructor(formatFn), false, |
| "Built-in functions don't implement [[Construct]] unless explicitly specified."); |
