| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-properties-of-the-promise-prototype-object |
| description: Promise.prototype does not have a [[PromiseState]] internal slot |
| info: | |
| The Promise prototype object is the intrinsic object %PromisePrototype%. The |
| value of the [[Prototype]] internal slot of the Promise prototype object is |
| the intrinsic object %ObjectPrototype%. The Promise prototype object is an |
| ordinary object. It does not have a [[PromiseState]] internal slot or any of |
| the other internal slots of Promise instances. |
| |
| 25.4.5.3 Promise.prototype.then |
| |
| 1. Let promise be the this value. |
| 2. If IsPromise(promise) is false, throw a TypeError exception. |
| |
| 25.4.1.6 IsPromise |
| |
| 1. If Type(x) is not Object, return false. |
| 2. If x does not have a [[PromiseState]] internal slot, return false. |
| ---*/ |
| |
| assert.throws(TypeError, function() { |
| Promise.prototype.then.call(Promise.prototype, function() {}, function() {}); |
| }); |