text: 'use strict';
  
  const shift = require('../shift-array/shift-array');
  
  describe('shift-array.test.js', () => {
    test('Should add new value to middle of array with odd number of elements', () => {
      expect(shift.insertShiftArray([1, 2, 3, 4, 5], 6)).toEqual([1, 2, 3, 6, 4, 5]);
    });
    test('Should add new value to middle of array with even number of elements', () => {
      expect(shift.insertShiftArray([1, 2, 3, 4, 5, 6], 7)).toEqual([1, 2, 3, 7, 4, 5, 6]);
    });
    test('Should add new value to empty array', () => {
      expect(shift.insertShiftArray([], 7)).toEqual([7]);
    });
  });
  