text: import countPairs from './index'
  
  describe('Sock Merchant', () => {
    test('sock merchant - test 0', () => {
      const array = [10, 20, 20, 10, 10, 30, 50, 10, 20];
      expect(countPairs(array)).toBe(3);
    });
  
    test('sock merchant - test 0', () => {
      const array = [1, 1, 3, 1, 2, 1, 3, 3, 3, 3];
      expect(countPairs(array)).toBe(4);
    });
  });
  
  