yield-star-next-non-object-ignores-then.case

// Copyright 2017 Tooru Fujisawa. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
template: default
desc: If next() value is not-object, do not access respective then property
info: |
    YieldExpression: yield * AssignmentExpression
    ...
    6. Repeat
      a. If received.[[Type]] is normal, then
        ii. Let innerResult be ? Invoke(iterator, "next",
            « received.[[Value]] »).
        iii. If generatorKind is async, then set innerResult to
             ? Await(innerResult).
        iv. If Type(innerResult) is not Object, throw a TypeError exception.
    ...

    Await

    ...
    2. Let promiseCapability be ! NewPromiseCapability(%Promise%).
    3. Perform ! Call(promiseCapability.[[Resolve]], undefined, « promise »).
    ...

    Promise Resolve Functions

    ...
    7. If Type(resolution) is not Object, then
      a. Return FulfillPromise(promise, resolution).
    8. Let then be Get(resolution, "then").
    ...
features: [Symbol.asyncIterator]
flags: [async]
---*/

//- setup
Number.prototype.then = function() {
  throw new Test262Error('Number#then should not be used');
};
var obj = {
  get [Symbol.iterator]() {
    throw new Test262Error('it should not get Symbol.iterator');
  },
  [Symbol.asyncIterator]() {
    return {
      next() {
        return 42;
      }
    };
  }
};

//- body
  yield* obj;
  throw new Test262Error('abrupt completion closes iter');

//- assertions
iter.next().then(() => {
  throw new Test262Error('Promise incorrectly fulfilled.');
}, v => {
  assert.sameValue(v.constructor, TypeError, 'TypeError');

  iter.next().then(({ done, value }) => {
    assert.sameValue(done, true, 'the iterator is completed');
    assert.sameValue(value, undefined, 'value is undefined');
  }).then($DONE, $DONE);
}).catch($DONE);