Question

在nodeJS中使用Jest运行此集成测试时：

const request = require("supertest");
let server;

describe("/api/chat", () => {
  beforeEach(() => {
    server = require("../../api");
  });
  describe("GET /userlist", () => {
    it("show userlist", async () => {
      const result = await request(server)
        .get("/api/chat/userlist")
        .set("X-Auth", process.env.XAuth);
      expect(result.status).toBe(200);
    });
  });
  afterAll(done => {
    server.close(done);
  });
});

使用api.js文件：

const PORT = process.env.PORT;

const server = app.listen(PORT, () => {
  console.log(`listening on port ${PORT}`);
});

app.use("/api/chat", chat);

module.exports = server;

我得到一个错误，它阻止了退出：

Jest has detected the following 1 open handle potentially keeping Jest from exiting:

  ●  TCPSERVERWRAP

      21 | const PORT = process.env.PORT;
      22 | 
    > 23 | const server = app.listen(PORT, () => {
         |                    ^
      24 |   console.log(`listening on port ${PORT}`);
      25 | });
      26 |

有什么想法吗？我已经在Github上进行了检查，但没有任何帮助或仅仅是一种解决方法。如何正确关闭连接？

Answer 1

我刚刚开始使用 jest，经过几次实验，以下对我有用。

测试时修改app.js如下，

const PORT = process.env.PORT;

// COMMENT THESE
// const server = app.listen(PORT, () => {
//  console.log(`listening on port ${PORT}`);
// });

app.use("/api/chat", chat);

module.exports = app; // EXPORT app

在测试文件中使用 supertest 如下，

// IMPORT app HERE ARE USE IT AS FOLLOWS
await request(app)
        .post("/api/chat")
        .set("Content-Type", "application/json")
        .send({ ...your_payload });

最后关闭数据库连接，

afterAll(done => {
  // THIS IS HOW YOU CLOSE CONNECTION IN MONGOOSE (mongodb ORM)
  mongoose.connection.close();
  done();
});

开玩笑无法正常退出

1 个答案: