jest和mongoose-jest已检测到打开的句柄

因此，我使用

jest

测试我的node.js应用程序，测试完成得很好，但我从jest那里得到了一条关于开放句柄的消息。有什么见解吗

开玩笑——侦探本汉德斯

通过src/libs/user/测试/user\u model\u test.js通过 src/测试/app_test.js通过 src/libs/user/测试/user\u service\u test.js

测试套件：3项通过，共3项测试：14项通过，共14项 快照：0总时间：7.209s运行所有测试套件

Jest检测到以下4个打开的句柄可能保留 开玩笑说不要退出：

● 允诺

  2 | // we use a test database for testing
  3 | var mongoDB = 'mongodb://localhost/my_db_conn';
> 4 | mongoose.connect(mongoDB);
    |          ^
  5 | const User = require('../user_model');
  6 |
  7 | describe("User model test", () => {

  at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:424:19)
  at Mongoose.Object.<anonymous>.Mongoose.connect (node_modules/mongoose/lib/index.js:208:15)
  at Object.<anonymous> (src/libs/user/__tests__/user_model_test.js:4:10)

   8 | });
   9 |
> 10 | module.exports = mongoose.model("User", UserSchema);
     |                           ^

  at Function.init (node_modules/mongoose/lib/model.js:962:16)
  at Mongoose.Object.<anonymous>.Mongoose.model (node_modules/mongoose/lib/index.js:392:11)
  at Object.<anonymous> (src/libs/user/user_model.js:10:27)
  at Object.<anonymous> (src/libs/user/__tests__/user_model_test.js:5:14)

   8 | });
   9 |
> 10 | module.exports = mongoose.model("User", UserSchema);
     |                           ^

  at Function.init (node_modules/mongoose/lib/model.js:962:16)
  at Mongoose.Object.<anonymous>.Mongoose.model (node_modules/mongoose/lib/index.js:392:11)
  at Object.<anonymous> (src/libs/user/user_model.js:10:27)
  at Object.<anonymous> (src/libs/user/index.js:1:41)

  3 | var mongoose = require('mongoose');
  4 | var mongoDB = 'mongodb://localhost/my_db_conn';
> 5 | mongoose.connect(mongoDB);
    |          ^
  6 |
  7 | describe('App test', () => {
  8 |     it('has a module', () => {

  at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:424:19)
  at Mongoose.Object.<anonymous>.Mongoose.connect (node_modules/mongoose/lib/index.js:208:15)
  at Object.<anonymous> (src/__tests__/app_test.js:5:10)

2 |//我们使用测试数据库进行测试
3 | var mongoDB=mongodb://localhost/my_db_conn';
>4 |猫鼬连接（mongoDB）；
|          ^
5 | const User=require（'../User_model'）；
6 |
7 |描述（“用户模型测试”，（）=>{
在NativeConnection.Object..Connection.openUri（node_modules/mongoose/lib/Connection.js:424:19）
在Mongoose.Object..Mongoose.connect（node_modules/Mongoose/lib/index.js:208:15）
at对象。（src/libs/user/__测试_;/user_模型_测试.js:4:10）

● 允诺

  2 | // we use a test database for testing
  3 | var mongoDB = 'mongodb://localhost/my_db_conn';
> 4 | mongoose.connect(mongoDB);
    |          ^
  5 | const User = require('../user_model');
  6 |
  7 | describe("User model test", () => {

  at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:424:19)
  at Mongoose.Object.<anonymous>.Mongoose.connect (node_modules/mongoose/lib/index.js:208:15)
  at Object.<anonymous> (src/libs/user/__tests__/user_model_test.js:4:10)

   8 | });
   9 |
> 10 | module.exports = mongoose.model("User", UserSchema);
     |                           ^

  at Function.init (node_modules/mongoose/lib/model.js:962:16)
  at Mongoose.Object.<anonymous>.Mongoose.model (node_modules/mongoose/lib/index.js:392:11)
  at Object.<anonymous> (src/libs/user/user_model.js:10:27)
  at Object.<anonymous> (src/libs/user/__tests__/user_model_test.js:5:14)

   8 | });
   9 |
> 10 | module.exports = mongoose.model("User", UserSchema);
     |                           ^

  at Function.init (node_modules/mongoose/lib/model.js:962:16)
  at Mongoose.Object.<anonymous>.Mongoose.model (node_modules/mongoose/lib/index.js:392:11)
  at Object.<anonymous> (src/libs/user/user_model.js:10:27)
  at Object.<anonymous> (src/libs/user/index.js:1:41)

  3 | var mongoose = require('mongoose');
  4 | var mongoDB = 'mongodb://localhost/my_db_conn';
> 5 | mongoose.connect(mongoDB);
    |          ^
  6 |
  7 | describe('App test', () => {
  8 |     it('has a module', () => {

  at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:424:19)
  at Mongoose.Object.<anonymous>.Mongoose.connect (node_modules/mongoose/lib/index.js:208:15)
  at Object.<anonymous> (src/__tests__/app_test.js:5:10)

8 |}）；
9 |
>10 | module.exports=mongoose.model（“用户”，UserSchema）；
|                           ^
在Function.init（node_modules/mongoose/lib/model.js:962:16）
在Mongoose.Object..Mongoose.model（node_modules/Mongoose/lib/index.js:392:11）
反对。（src/libs/user/user_model.js:10:27）
反对。（src/libs/user/_______/user_model_test.js:5:14）

● 允诺

  2 | // we use a test database for testing
  3 | var mongoDB = 'mongodb://localhost/my_db_conn';
> 4 | mongoose.connect(mongoDB);
    |          ^
  5 | const User = require('../user_model');
  6 |
  7 | describe("User model test", () => {

  at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:424:19)
  at Mongoose.Object.<anonymous>.Mongoose.connect (node_modules/mongoose/lib/index.js:208:15)
  at Object.<anonymous> (src/libs/user/__tests__/user_model_test.js:4:10)

   8 | });
   9 |
> 10 | module.exports = mongoose.model("User", UserSchema);
     |                           ^

  at Function.init (node_modules/mongoose/lib/model.js:962:16)
  at Mongoose.Object.<anonymous>.Mongoose.model (node_modules/mongoose/lib/index.js:392:11)
  at Object.<anonymous> (src/libs/user/user_model.js:10:27)
  at Object.<anonymous> (src/libs/user/__tests__/user_model_test.js:5:14)

   8 | });
   9 |
> 10 | module.exports = mongoose.model("User", UserSchema);
     |                           ^

  at Function.init (node_modules/mongoose/lib/model.js:962:16)
  at Mongoose.Object.<anonymous>.Mongoose.model (node_modules/mongoose/lib/index.js:392:11)
  at Object.<anonymous> (src/libs/user/user_model.js:10:27)
  at Object.<anonymous> (src/libs/user/index.js:1:41)

  3 | var mongoose = require('mongoose');
  4 | var mongoDB = 'mongodb://localhost/my_db_conn';
> 5 | mongoose.connect(mongoDB);
    |          ^
  6 |
  7 | describe('App test', () => {
  8 |     it('has a module', () => {

  at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:424:19)
  at Mongoose.Object.<anonymous>.Mongoose.connect (node_modules/mongoose/lib/index.js:208:15)
  at Object.<anonymous> (src/__tests__/app_test.js:5:10)

8 |}）；
9 |
>10 | module.exports=mongoose.model（“用户”，UserSchema）；
|                           ^
在Function.init（node_modules/mongoose/lib/model.js:962:16）
在Mongoose.Object..Mongoose.model（node_modules/Mongoose/lib/index.js:392:11）
反对。（src/libs/user/user_model.js:10:27）
反对。（src/libs/user/index.js:1:41）

● 允诺

  2 | // we use a test database for testing
  3 | var mongoDB = 'mongodb://localhost/my_db_conn';
> 4 | mongoose.connect(mongoDB);
    |          ^
  5 | const User = require('../user_model');
  6 |
  7 | describe("User model test", () => {

  at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:424:19)
  at Mongoose.Object.<anonymous>.Mongoose.connect (node_modules/mongoose/lib/index.js:208:15)
  at Object.<anonymous> (src/libs/user/__tests__/user_model_test.js:4:10)

   8 | });
   9 |
> 10 | module.exports = mongoose.model("User", UserSchema);
     |                           ^

  at Function.init (node_modules/mongoose/lib/model.js:962:16)
  at Mongoose.Object.<anonymous>.Mongoose.model (node_modules/mongoose/lib/index.js:392:11)
  at Object.<anonymous> (src/libs/user/user_model.js:10:27)
  at Object.<anonymous> (src/libs/user/__tests__/user_model_test.js:5:14)

   8 | });
   9 |
> 10 | module.exports = mongoose.model("User", UserSchema);
     |                           ^

  at Function.init (node_modules/mongoose/lib/model.js:962:16)
  at Mongoose.Object.<anonymous>.Mongoose.model (node_modules/mongoose/lib/index.js:392:11)
  at Object.<anonymous> (src/libs/user/user_model.js:10:27)
  at Object.<anonymous> (src/libs/user/index.js:1:41)

  3 | var mongoose = require('mongoose');
  4 | var mongoDB = 'mongodb://localhost/my_db_conn';
> 5 | mongoose.connect(mongoDB);
    |          ^
  6 |
  7 | describe('App test', () => {
  8 |     it('has a module', () => {

  at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:424:19)
  at Mongoose.Object.<anonymous>.Mongoose.connect (node_modules/mongoose/lib/index.js:208:15)
  at Object.<anonymous> (src/__tests__/app_test.js:5:10)

3 | var mongoose=require（'mongoose'）；
4 | var mongoDB=mongodb://localhost/my_db_conn';
>5 |猫鼬连接（mongoDB）；
|          ^
6 |
7 |描述（‘应用程序测试’，（）=>{
8 |它（'有一个模块'，（）=>{
在NativeConnection.Object..Connection.openUri（node_modules/mongoose/lib/Connection.js:424:19）
在Mongoose.Object..Mongoose.connect（node_modules/Mongoose/lib/index.js:208:15）
at对象。（src/__测试_;/app_测试.js:5:10）

---

它与返回承诺的

model.init

函数相关。快速修复方法是在创建如下模型时传递

skipInit

标志：

const User=mongoose.model（“用户”，userSchema，“用户”，true）

skipInit

是此函数中的第四个参数

但在这种情况下，它不会初始化模型的索引，因此最好根据

process.env.NODE\u env

const skipInit=process.env.NODE\u env==“测试”
const User=mongoose.model（“users”，userSchema，“users”，skipInit）

测试后，mongoose连接似乎保持打开状态，请尝试以下操作之一：

测试后关闭服务器实例

const server = require('./app'); //server instance    
server.close(); //put in afterAll or afterEach depending on your test

完成所有测试后关闭数据库连接

afterAll(()=>{ mongoose.connection.close();});

使用async/await包装mongoose连接

async function(){
   await mongoose.connect(mongoDB);
};

试试一个或一个组合。

---

这些是我的解决方案，因为我看不到你的代码。

我刚开始的项目几乎是空的，没有任何模型，也有相同的错误。所以这至少对我不起作用。@Alex我使用了你的答案，它起作用了-它可以防止开玩笑抱怨公开的承诺。但是，我不确定它是否有其他问题。在我的实时数据库中，它正确tly抱怨重复的电子邮件，因为它是一个唯一的字段。在我通过mockgoose的测试数据库中，它没有错误。我只能假设，因为设置skipInit=false，但我正在继续调查