mirror of https://github.com/tc39/test262.git
48 lines
1.1 KiB
JavaScript
48 lines
1.1 KiB
JavaScript
|
// Copyright (C) 2018 Kevin Gibbons. All rights reserved.
|
||
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
||
|
|
|
||
|
|
/*---
|
||
|
|
description: Closes iterators when toString on a key throws.
|
||
|
|
esid: sec-object.fromentries
|
||
|
|
features: [Symbol.iterator, Object.fromEntries]
|
||
|
|
---*/
|
||
|
|
|
||
|
|
function DummyError() {}
|
||
|
|
|
||
|
|
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: {
|
||
|
|
0: {
|
||
|
|
toString: function() {
|
||
|
|
throw new DummyError();
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
};
|
||
|
|
},
|
||
|
|
return: function() {
|
||
|
|
if (returned) {
|
||
|
|
throw new Test262Error('should only return once');
|
||
|
|
}
|
||
|
|
returned = true;
|
||
|
|
},
|
||
|
|
};
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
assert.throws(DummyError, function() {
|
||
|
|
Object.fromEntries(iterable);
|
||
|
|
});
|
||
|
|
|
||
|
|
assert(returned, 'iterator should be closed when key toString throws');
|