diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/Object/fromEntries/iterator-closed-for-throwing-entry-key-accessor.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Object/fromEntries/iterator-closed-for-throwing-entry-key-accessor.js | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/fromEntries/iterator-closed-for-throwing-entry-key-accessor.js b/js/src/tests/test262/built-ins/Object/fromEntries/iterator-closed-for-throwing-entry-key-accessor.js new file mode 100644 index 0000000000..c1b9e01880 --- /dev/null +++ b/js/src/tests/test262/built-ins/Object/fromEntries/iterator-closed-for-throwing-entry-key-accessor.js @@ -0,0 +1,63 @@ +// 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 accessing an entry's key throws. +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, + ... + e. Let k be Get(nextItem, "0"). + f. If k is an abrupt completion, return ? IteratorClose(iteratorRecord, k). + +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: { + get '0'() { + 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 entry property access throws'); + +reportCompare(0, 0); |