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import swap from '../../utils/swap';
describe('swap', () => {
it('should swap value positions', () => {
const test1 = [1, 2, 3, 4];
swap(test1, 1, 2);
expect(test1).toEqual([1, 3, 2, 4]);
const test2 = [
{
firstName: '1',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
{
firstName: '2',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
{
firstName: '3',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
];
swap(test2, 0, 2);
expect(test2).toEqual([
{
firstName: '3',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
{
firstName: '2',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
{
firstName: '1',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
]);
});
it('should swap undefined position when index is not exists', () => {
const test1 = [1, 2, 3, 4];
swap(test1, 0, 4);
expect(test1).toEqual([undefined, 2, 3, 4, 1]);
const test2 = [1, 2, 3, 4];
swap(test2, 2, 6);
expect(test2).toEqual([1, 2, undefined, 4, undefined, undefined, 3]);
});
});
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