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import insert from '../../utils/insert';
describe('insert', () => {
it('should insert value at specific index in array', () => {
expect(insert([1, 3, 4], 1, 2)).toEqual([1, 2, 3, 4]);
expect(
insert(
[
{
firstName: '1',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
{
firstName: '2',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
{
firstName: '4',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
],
2,
{
firstName: '3',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
),
).toEqual([
{
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',
},
{
firstName: '4',
lastName: 'Luo',
id: '75309979-e340-49eb-8016-5f67bfb56c1c',
},
]);
});
it('should insert undefined as value when value to be inserted is falsy', () => {
expect(insert([1, 2, 4], 2)).toEqual([1, 2, undefined, 4]);
expect(insert([1, 2, 4], 2, 0)).toEqual([1, 2, 0, 4]);
expect(insert([1, 2, 4] as (boolean | number)[], 2, false)).toEqual([
1,
2,
false,
4,
]);
expect(insert([1, 2, 4] as (number | string)[], 2, '')).toEqual([
1,
2,
'',
4,
]);
expect(insert([1, 2, 4], 2, undefined)).toEqual([1, 2, undefined, 4]);
});
it('should spread value when it is an array at one deep-level', () => {
expect(insert([1, 2], 2, [3, 4])).toEqual([1, 2, 3, 4]);
expect(insert([1, 2], 2, [3, [4]])).toEqual([1, 2, 3, [4]]);
});
});
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