82 lines
3.3 KiB
JavaScript
82 lines
3.3 KiB
JavaScript
import * as arrayUtils from '~/lib/utils/array_utility';
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describe('array_utility', () => {
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describe('swapArrayItems', () => {
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it.each`
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array | leftIndex | rightIndex | result
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${[]} | ${0} | ${0} | ${[]}
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${[1]} | ${0} | ${1} | ${[1]}
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${[1, 2]} | ${0} | ${0} | ${[1, 2]}
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${[1, 2]} | ${0} | ${1} | ${[2, 1]}
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${[1, 2]} | ${1} | ${2} | ${[1, 2]}
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${[1, 2]} | ${2} | ${1} | ${[1, 2]}
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${[1, 2]} | ${1} | ${10} | ${[1, 2]}
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${[1, 2]} | ${10} | ${1} | ${[1, 2]}
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${[1, 2]} | ${1} | ${-1} | ${[1, 2]}
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${[1, 2]} | ${-1} | ${1} | ${[1, 2]}
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${[1, 2, 3]} | ${1} | ${1} | ${[1, 2, 3]}
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${[1, 2, 3]} | ${0} | ${2} | ${[3, 2, 1]}
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${[1, 2, 3, 4]} | ${0} | ${2} | ${[3, 2, 1, 4]}
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${[1, 2, 3, 4, 5]} | ${0} | ${4} | ${[5, 2, 3, 4, 1]}
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${[1, 2, 3, 4, 5]} | ${1} | ${2} | ${[1, 3, 2, 4, 5]}
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${[1, 2, 3, 4, 5]} | ${2} | ${1} | ${[1, 3, 2, 4, 5]}
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`(
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'given $array with index $leftIndex and $rightIndex will return $result',
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({ array, leftIndex, rightIndex, result }) => {
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const actual = arrayUtils.swapArrayItems(array, leftIndex, rightIndex);
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expect(actual).toEqual(result);
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expect(actual).not.toBe(array);
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},
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);
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});
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describe('getDuplicateItemsFromArray', () => {
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it.each`
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array | result
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${[]} | ${[]}
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${[1, 2, 2, 3, 3, 4]} | ${[2, 3]}
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${[1, 2, 3, 2, 3, 4]} | ${[2, 3]}
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${['foo', 'bar', 'bar', 'foo', 'baz']} | ${['bar', 'foo']}
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${['foo', 'foo', 'bar', 'foo', 'bar']} | ${['foo', 'bar']}
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`('given $array will return $result', ({ array, result }) => {
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expect(arrayUtils.getDuplicateItemsFromArray(array)).toEqual(result);
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});
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});
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describe('toggleArrayItem', () => {
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it('adds an item to the array if it does not exist', () => {
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expect(arrayUtils.toggleArrayItem([], 'item')).toStrictEqual(['item']);
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});
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it('removes an item from the array if it already exists', () => {
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expect(arrayUtils.toggleArrayItem(['item'], 'item')).toStrictEqual([]);
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});
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describe('pass by value', () => {
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it('does not toggle the array item when passed a new object', () => {
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expect(arrayUtils.toggleArrayItem([{ a: 1 }], { a: 1 })).toStrictEqual([
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{ a: 1 },
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{ a: 1 },
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]);
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});
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it('does not toggle the array item when passed a new array', () => {
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expect(arrayUtils.toggleArrayItem([[1]], [1])).toStrictEqual([[1], [1]]);
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});
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});
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describe('pass by reference', () => {
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const array = [1];
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const object = { a: 1 };
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it('toggles the array item when passed a object reference', () => {
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expect(arrayUtils.toggleArrayItem([object], object)).toStrictEqual([]);
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});
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it('toggles the array item when passed an array reference', () => {
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expect(arrayUtils.toggleArrayItem([array], array)).toStrictEqual([]);
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});
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});
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});
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});
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