mirror of
https://github.com/facebook/react-native.git
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Rujin Cao
b2ac528156
Differential Revision: D39536169 fbshipit-source-id: 6c8d6787328eefecd23f3498b14a6d9ff750a670
55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @oncall react_native
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*/
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'use strict';
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describe('groupByEveryN', () => {
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const 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)).toEqual([
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[1],
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[2],
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[3],
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[4],
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[5],
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[6],
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[7],
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[8],
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[9],
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]);
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expect(groupByEveryN([1, 2, 3, 4, 5, 6, 7, 8, 9], 2)).toEqual([
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[1, 2],
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[3, 4],
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[5, 6],
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[7, 8],
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[9, null],
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]);
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expect(groupByEveryN([1, 2, 3, 4, 5, 6, 7, 8, 9], 3)).toEqual([
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[1, 2, 3],
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[4, 5, 6],
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[7, 8, 9],
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]);
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expect(groupByEveryN([1, 2, 3, 4, 5, 6, 7, 8, 9], 4)).toEqual([
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[1, 2, 3, 4],
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[5, 6, 7, 8],
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[9, null, null, null],
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]);
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});
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it('should fill with null', () => {
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expect(groupByEveryN([], 4)).toEqual([]);
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expect(groupByEveryN([1], 4)).toEqual([[1, null, null, null]]);
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expect(groupByEveryN([1, 2], 4)).toEqual([[1, 2, null, null]]);
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expect(groupByEveryN([1, 2, 3], 4)).toEqual([[1, 2, 3, null]]);
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expect(groupByEveryN([1, 2, 3, 4], 4)).toEqual([[1, 2, 3, 4]]);
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});
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});
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