如何在 post 路由上模拟 Express/Node.js 中间件?
How to mock an Express/Node.js middleware on a post route?
我正在用 chai 和 mocha 编写一些测试,但遇到了一些麻烦。 例如,在我在这里粘贴的路由中,LOGOUT 调用 isLoggedIn 中间件来检查用户是否存在于会话中。 例如,如果这样做:
it('Logout', function(done) {
chai.request(baseURL)
.post('/logout')
.end(function(err, res) {
expect(err).to.be.null;
expect(res).to.have.status(204);
done();
});
});
测试失败导致我收到 401 状态代码。我是这个测试的新手。我知道我必须使用 sinon 才能通过 mi 测试,但我找不到解决方案。
这是我的路线:
'use strict';
const express = require('express');
const createError = require('http-errors');
const router = express.Router();
const bcrypt = require('bcrypt');
const User = require('../models/User');
const {isLoggedIn} = require('../helpers/middlewares');
router.post('/logout', isLoggedIn(), (req, res, next) => {
req.session.destroy();
return res.status(204).send();
});
这是中间件:
'use strict';
const createError = require('http-errors');
exports.isLoggedIn = () => (req, res, next) => {
if (req.session.user) {
next();
} else {
next(createError(401));
};
};
非常感谢!!!
在您的流程问题中,在 运行 快速应用程序期间和之后初始化的快速中间件变得不可用于存根。我的解决方案是在 运行 express application.
之前初始化存根test.spec.js:
const chai = require("chai"),
sinon = require("sinon"),
chaiHttp = require("chai-http"),
initServer = require("./initTestServer"),
isLoggedInMiddleware = require("./middleware");
chai.use(chaiHttp);
const { expect } = chai;
describe("Resource: /", function() {
before(function() {
sinon.stub(isLoggedInMiddleware, "isLoggedIn").callsFake(function() {
return (req, res, next) => {
next();
};
});
this.httpServer = initServer();
});
after(function() {
this.httpServer.close();
});
describe("#POST /login", function() {
beforeEach(function() {
this.sandbox = sinon.createSandbox();
});
afterEach(function() {
this.sandbox.restore();
});
it("- should login in system and return data", async function() {
return chai
.request(this.httpServer.server)
.post("/logout")
.end((err, res) => {
expect(err).to.be.null;
expect(res).to.have.status(204);
});
});
});
});
initTestServer.js:
const isLoggedInMiddleware = require("./middleware");
const initServer = () => {
const express = require("express");
const app = express();
app.post("/logout", isLoggedInMiddleware.isLoggedIn(), (req, res, next) => {
return res.status(204).send();
});
const server = require("http").createServer(app);
server.listen(3004);
const close = () => {
server.close();
global.console.log(`Close test server connection on ${process.env.PORT}`);
};
return { server, close };
};
module.exports = initServer;
谢谢@EduardS 的回答!! 我用类似的方法解决了它:
it('Logout', async function(done) {
sinon.stub(helpers, 'isLoggedIn')
helpers.isLoggedIn.callsFake((req, res, next) => {
return (req, res, next) => {
next();
};
})
app = require('../index')
chai.request(app)
.post('/api/auth/logout')
.end(function(err, res2) {
expect(res2).to.have.status(204);
helpers.isLoggedIn.restore()
})
done();
});