text: const zero_sum_subarrays = require('./zero_sum_subarrays');
  
  describe('zero_sum_subarrays', () => {
  
      it('should return an empty array when no subarrays exist', () => {
          const array = [4, 1, 7, 4, 6, 3];
          const result = zero_sum_subarrays(array);
          expect(result).toEqual([]);
      });
  
      it('should find a single pair in an array with only one', () => {
          const array = [3, 1, 7, -7, 6, 3];
          const result = zero_sum_subarrays(array);
          expect(result).toEqual([[2, 3]]);
      });
  
      it('should find multiple subarrays in an array with more than one', () => {
          const array = [3, 1, -4, 4, 3, -7];
          const result = zero_sum_subarrays(array);
          expect(result).toEqual([[0, 2], [2, 3], [3, 5]]);
      });
  
  });
  