text: 'use strict';
  
  const quickSort = require('../quick-sort');
  
  describe('quickSort', () => {
    it('requires an array', () => {
      expect(quickSort()).toEqual([]);
    });
  
    it('returns an empty array if the array is empty', () => {
      expect(quickSort([])).toEqual([]);
    });
  
    it('returns an sorted array', () => {
      expect(quickSort([3,6,2,0,11,7])).toEqual([0,2,3,6,7,11]);
    });
  });