test/built-ins/Promise/resolve-self.js


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// 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 a reference to the promise itself
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
    [...]
    6. If SameValue(resolution, promise) is true, then
       a. Let selfResolutionError be a newly created TypeError object.
       b. Return RejectPromise(promise, selfResolutionError).
flags: [async]
---*/

var returnValue = null;
var resolve;
var promise = new Promise(function(_resolve) {
  resolve = _resolve;
});

promise.then(function() {
    $DONE('The promise should not be fulfilled.');
  }, function(reason) {
    if (!reason) {
      $DONE('The promise should be rejected with a value.');
      return;
    }

    if (reason.constructor !== TypeError) {
      $DONE('The promise should be rejected with a TypeError instance.');
      return;
    }

    $DONE();
  });

returnValue = resolve(promise);

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