mirror of https://github.com/tc39/test262.git
35 lines
850 B
JavaScript
35 lines
850 B
JavaScript
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// 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: Map.groupBy with a nullish Symbol.iterator throws
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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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4. Let iteratorRecord be ? GetIterator(items).
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...
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features: [array-grouping, Map]
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---*/
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const throws = function () {
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throw new Test262Error('callback function should not be called')
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};
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function makeIterable(obj, iteratorFn) {
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obj[Symbol.iterator] = iteratorFn;
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return obj;
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}
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assert.throws(TypeError, function () {
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Map.groupBy(makeIterable({}, undefined), throws);
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}, 'undefined Symbol.iterator');
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assert.throws(TypeError, function () {
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Map.groupBy(makeIterable({}, null), throws);
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}, 'null Symbol.iterator');
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