test262/test/built-ins/Promise/resolve-poisoned-then-immed.js

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: >
    Resolving with an object with a "poisoned" `then` property from within the
    executor function
es6id: 25.4.3.1
info: >
    [...]
    8. Let resolvingFunctions be CreateResolvingFunctions(promise).
    9. Let completion be Call(executor, undefined,
       «resolvingFunctions.[[Resolve]], resolvingFunctions.[[Reject]]»).

    25.4.1.3.2 Promise Resolve Functions
    7. If Type(resolution) is not Object, then
       a. Return FulfillPromise(promise, resolution).
flags: [async]
---*/

var returnValue = null;
var value = {};
var poisonedThen = Object.defineProperty({}, 'then', {
  get: function() {
    throw value;
  }
});
var promise = new Promise(function(resolve) {
  returnValue = resolve(poisonedThen);
});

assert.sameValue(returnValue, undefined, '"resolve" return value');

promise.then(function() {
    $DONE('The promise should not be fulfilled.');
  }, function(val) {
    if (val !== value) {
      $DONE('The promise should be fulfilled with the provided value.');
      return;
    }

    $DONE();
  });