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'use strict';
const VirtualType = require('../lib/virtualtype');const assert = require('assert');
describe('VirtualType', function() {  describe('clone', function() {    it('copies path and options correctly (gh-8587)', function() {      const opts = { ref: 'User', localField: 'userId', foreignField: '_id' };      const virtual = new VirtualType(Object.assign({}, opts), 'users');
      const clone = virtual.clone();      assert.equal(clone.path, 'users');      assert.deepEqual(clone.options, opts);    });  });});