41 lines
1.3 KiB
JavaScript
41 lines
1.3 KiB
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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'use strict';
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jest.unmock('groupByEveryN');
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describe('groupByEveryN', () => {
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var groupByEveryN = require('groupByEveryN');
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it('should group by with different n', () => {
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expect(groupByEveryN([1, 2, 3, 4, 5, 6, 7, 8, 9], 1))
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.toEqual([[1], [2], [3], [4], [5], [6], [7], [8], [9]]);
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expect(groupByEveryN([1, 2, 3, 4, 5, 6, 7, 8, 9], 2))
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.toEqual([[1, 2], [3, 4], [5, 6], [7, 8], [9, null]]);
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expect(groupByEveryN([1, 2, 3, 4, 5, 6, 7, 8, 9], 3))
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.toEqual([[1, 2, 3], [4, 5, 6], [7, 8, 9]]);
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expect(groupByEveryN([1, 2, 3, 4, 5, 6, 7, 8, 9], 4))
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.toEqual([[1, 2, 3, 4], [5, 6, 7, 8], [9, null, null, null]]);
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});
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it('should fill with null', () => {
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expect(groupByEveryN([], 4))
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.toEqual([]);
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expect(groupByEveryN([1], 4))
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.toEqual([[1, null, null, null]]);
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expect(groupByEveryN([1, 2], 4))
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.toEqual([[1, 2, null, null]]);
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expect(groupByEveryN([1, 2, 3], 4))
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.toEqual([[1, 2, 3, null]]);
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expect(groupByEveryN([1, 2, 3, 4], 4))
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.toEqual([[1, 2, 3, 4]]);
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});
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});
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