一尘不染

Sinon存根被跳过作为节点表达中间件

node.js

我正在尝试测试特定路线的行为。即使我创建存根,它也会继续运行中间件。我希望事件认证暂时通过。我了解到,这并不是真正的“单元”测试。我快到那里了。我还简化了代码。这是要测试的代码:

const { rejectUnauthenticated } = require('../modules/event-authentication.middleware');

router.get('/event', rejectUnauthenticated, (req, res) => {
  res.sendStatus(200);
});

这是我要跳过的中间件:

const rejectUnauthenticated = async (req, res, next) => {
  const { secretKey } = req.query;
  if (secretKey) {
    next();
  } else {
    res.status(403).send('Forbidden. Must include Secret Key for Event.');
  }
};

module.exports = {
  rejectUnauthenticated,
};

测试文件:

const chai = require('chai');
const chaiHttp = require('chai-http');
const sinon = require('sinon');
let app;
const authenticationMiddleware = require('../server/modules/event-authentication.middleware');

const { expect } = chai;
chai.use(chaiHttp);

describe('with correct secret key', () => {
  it('should return bracket', (done) => {
    sinon.stub(authenticationMiddleware, 'rejectUnauthenticated')
      .callsFake(async (req, res, next) => next());

    app = require('../server/server.js');

    chai.request(app)
      .get('/code-championship/registrant/event')
      .end((err, response) => {
        expect(response).to.have.status(200);
        authenticationMiddleware.rejectUnauthenticated.restore();
        done();
      });
  });
});

我尝试过其他类似的问题,但是我仍然从中间件中获取403,应该跳过它。我还以调试模式运行测试,因此我知道应该存根的中间件功能仍在运行。

这是存根我的代码的问题吗?这是ES6问题吗?

我可以重组我的代码或测试以使其正常工作吗?


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2020-07-07

共1个答案

一尘不染

存根代码确实存在问题。

当您需要服务器文件时

const app = require('../server/server.js');

您的应用是通过包括在内的整套中间件创建的,并且在中间rejectUnauthenticated存储了对中间件的引用app

当你做

sinon.stub(authenticationMiddleware, 'rejectUnauthenticated')
  .callsFake(async (req, res, next) => next());

您将替换模块的rejectUnauthenticated导出方法authenticationMiddleware,而不是替换rejectUnauthenticated已存储的原始引用。

解决方案是 模拟外部中间件方法 创建应用程序(即require('../server/server.js');): __

const chai = require('chai');
const chaiHttp = require('chai-http');
const sinon = require('sinon');

// don't create app right away
let app;
const authenticationMiddleware = require('../server/modules/event-authentication.middleware');

const { expect } = chai;
chai.use(chaiHttp);

describe('with correct secret key', () => {
  it('should return bracket', (done) => {
    sinon.stub(authenticationMiddleware, 'rejectUnauthenticated')
      .callsFake(async (req, res, next) => next());

    // method is stubbed, you can create app now
    app = require('../server/server.js');

    chai.request(app)
      .get('/code-championship/registrant/event')
      .end((err, response) => {
        expect(response).to.have.status(200);
        authenticationMiddleware.rejectUnauthenticated.restore();
        done();
      });
  });
});
2020-07-07