| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 23.1.5.2.1 |
| description: > |
| Throws a TypeError if `this` does not have all of the internal slots of a Map |
| Iterator Instance. |
| info: | |
| %MapIteratorPrototype%.next ( ) |
| |
| 1. Let O be the this value. |
| 2. If Type(O) is not Object, throw a TypeError exception. |
| 3. If O does not have all of the internal slots of a Map Iterator Instance |
| (23.1.5.3), throw a TypeError exception. |
| ... |
| features: [Symbol.iterator] |
| ---*/ |
| |
| var map = new Map([[1, 11], [2, 22]]); |
| |
| var iterator = map[Symbol.iterator](); |
| assert.throws(TypeError, function() { |
| iterator.next.call({}); |
| }); |
| |
| iterator = map.entries(); |
| assert.throws(TypeError, function() { |
| iterator.next.call({}); |
| }); |
| |
| iterator = map.keys(); |
| assert.throws(TypeError, function() { |
| iterator.next.call({}); |
| }); |
| |
| iterator = map.values(); |
| assert.throws(TypeError, function() { |
| iterator.next.call({}); |
| }); |
| |
| // does not throw an Error |
| iterator.next.call(map[Symbol.iterator]()); |