javascript - Jest 检测到以下 1 个打开的句柄可能会阻止 Jest 退出

Question

这是我的 HTTP 路由

 app.get('/', (req, res) => {
    res.status(200).send('Hello World!')
})

app.post('/sample', (req, res) => {
    res.status(200).json({
        x:1,y:2
    });
})

我想测试以下内容

1) GET 请求工作正常。

2) /sample 响应包含属性以及 x 和 y

const request = require('supertest');
const app = require('../app');

describe('Test the root path', () => {
    test('It should response the GET method', () => {
        return request(app).get('/').expect(200);
    });
})

describe('Test the post path', () => {
    test('It should response the POST method', (done) => {
        return request(app).post('/sample').expect(200).end(err,data=>{
            expect(data.body.x).toEqual('1');

        });
    });
})

但是我在运行测试时遇到了以下错误

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

return request(app).get('/').expect(200);

Answer 1

你需要在end()方法中调用done()

const request = require("supertest");
const app = require("../app");

let server = request(app);

it("should return 404", done =>
    server
        .get("/")
        .expect(404)
        .end(done);
});