text: import  difference  from "./../src/difference.js";
  import chai from "./../node_modules/chai/chai.js";
  import { assert } from "chai";
  
  describe('Difference function', function(){
      it('difference([2,1],[2,3]) should be equal to [1]',function(){
          assert.isArray(difference([2, 1], [2, 3]));
          assert.sameMembers(difference([2,1], [2,3]), [1]);
      });
      it('difference([],[]) should be equal to []',function(){
          assert.isArray(difference([], []));
          assert.sameMembers(difference([], []), []);
      });
      it('difference([1, 2, 3, 3, 3],[3]) should be equal to []',function(){
          assert.isArray(difference([1, 2, 3, 3, 3], [3]));
          assert.sameMembers(difference([1, 2, 3, 3, 3], [3]), [1, 2]);
      });
  
      it('difference([ ],[3]) should be equal to []',function(){
          assert.isArray(difference([1, 2, 3, 3, 3], [3]));
          assert.sameMembers(difference([1, 2, 3, 3, 3], [3]), [1, 2]);
      });
  });