mirror of https://github.com/tc39/test262.git
28 lines
697 B
JavaScript
28 lines
697 B
JavaScript
// Copyright (c) 2023 Ecma International. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-map.groupby
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description: Callback is not called and object is not populated if the iterable is empty
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info: |
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Map.groupBy ( items, callbackfn )
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...
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GroupBy ( items, callbackfn, coercion )
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6. Repeat,
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c. If next is false, then
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i. Return groups.
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...
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features: [array-grouping, Map]
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---*/
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const original = [];
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const map = Map.groupBy(original, function () {
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throw new Test262Error('callback function should not be called')
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});
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assert.notSameValue(original, map, 'Map.groupBy returns a map');
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assert.sameValue(map.size, 0);
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