Question

我想在sinon.js上使用模拟传递测试。 app.js：

const express = require('express');
const route = require('./server/routes/index');
const app = express();
app.use('/', route);

index.js：

const router = require('express').Router();
const ctrlUsers = require('../controllers/users');
router.get('/users', ctrlUsers.UsersRead);

users.js：

   const User = require('../models/user');
   module.exports.UsersRead = function UsersRead(req, res) {
   User
    .query()
    .then((user) => {
      res.render('results');
    })
    .catch((err) => {
      res.render('error');
    });
};

user.test.js：

const app = require('../app');
const sinon = require('sinon');

describe('Get /users', () => {
  const appMock = sinon.mock(app);
  test('status of get', () => {
    appMock.expects('get').once().withArgs('/users').returns(0);

    appMock.restore();
    appMock.verify();
  });
});

我运行测试文件，但测试失败，我收到了这个错误：

ExpectationError: Expected get(/providers[, ...]) once (never called)

  at Object.fail (node_modules/sinon/lib/sinon/mock-expectation.js:281:25)
  at Object.verify (node_modules/sinon/lib/sinon/mock.js:108:29)
  at Object.test (__tests__/usersRoutes.test.js:11:13)
      at Promise (<anonymous>)
      at <anonymous>

我该如何解决？

Answer 1

你应该调用app来嘲笑它。创建mock之后，将app.get('/users')添加到代码中：

const app = require('../app');
const sinon = require('sinon');

describe('Get /users', () => {
  const appMock = sinon.mock(app);
  test('status of get', () => {
    appMock.expects('get').once().withArgs('/users').returns(0);
    app.get('/users');
    appMock.restore();
    appMock.verify();
  });
});

有关详细信息，请查看Sinon.js

如何在sinon.js上使用mock传递测试？

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