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test(at): add negative indices test (#495)

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Junseong Park 2024-09-09 14:49:12 +09:00 committed by GitHub
parent 3c3bba011f
commit aa92dcf6c8
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1 changed files with 6 additions and 1 deletions
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7
src/array/at.spec.ts
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@ -6,6 +6,11 @@ describe('at', () => {
expect(at(['a', 'b', 'c'], [0, 2])).toEqual(['a', 'c']);
expect(at(['a', 'b', 'c'], [2, 0])).toEqual(['c', 'a']);
});
it('should support negative indices', () => {
expect(at(['a', 'b', 'c'], [-1, -2])).toEqual(['c', 'b']);
expect(at(['a', 'b', 'c'], [-2, -1])).toEqual(['b', 'c']);
});
it('should return `undefined` for nonexistent keys', () => {
expect(at(['a', 'b', 'c'], [2, 4, 0])).toEqual(['c', undefined, 'a']);
@ -13,5 +18,5 @@ describe('at', () => {
it('should return an empty array when no keys are given', () => {
expect(at(['a', 'b', 'c'], [])).toEqual([]);
});
});
});