text: 'use strict';
  
  const chai = require('chai');
  
  chai.should();
  
  const PersistentEnemy = require('../../lib/PersistentEnemy');
  
  describe('PersistentEnemy', function () {
    describe('#constructor()', function () {
      it('should throw TypeError when called with no arguments or an invalid argument', function () {
        (() => { new PersistentEnemy(); }).should.throw(TypeError);
        (() => { new PersistentEnemy({}); }).should.throw(TypeError);
      });
    });
  });
  