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// Copyright (C) 2018 Kevin Gibbons. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-object.fromentries
description: Closes iterators when they return entries which are null.
info: |
Object.fromEntries ( iterable )
...
4. Let stepsDefine be the algorithm steps defined in CreateDataPropertyOnObject Functions.
5. Let adder be CreateBuiltinFunction(stepsDefine, « »).
6. Return ? AddEntriesFromIterable(obj, iterable, adder).
AddEntriesFromIterable ( target, iterable, adder )
...
4. Repeat,
...
d. If Type(nextItem) is not Object, then
i. Let error be ThrowCompletion(a newly created TypeError object).
ii. Return ? IteratorClose(iteratorRecord, error).
features: [Symbol.iterator, Object.fromEntries]
---*/
var returned = false;
var iterable = {
[Symbol.iterator]: function() {
var advanced = false;
return {
next: function() {
if (advanced) {
throw new Test262Error('should only advance once');
}
advanced = true;
return {
done: false,
value: null,
};
},
return: function() {
if (returned) {
throw new Test262Error('should only return once');
}
returned = true;
},
};
},
};
assert.sameValue(typeof Object.fromEntries, 'function');
assert.throws(TypeError, function() {
Object.fromEntries(iterable);
});
assert(returned, 'iterator should be closed when entry is null');
reportCompare(0, 0);