text: import { describe, expect, it } from 'vitest';
  import { pairSum } from '../pair-sum';
  
  describe('pairSum', () => {
    it('', () => {
      expect(pairSum([5, 4, 2, 1])).toEqual(6);
    });
  
    it('', () => {
      expect(pairSum([4, 2, 2, 3])).toEqual(7);
    });
  
    it('', () => {
      expect(pairSum([1, 100000])).toEqual(100001);
    });
  });
  