使用sinon存根在mocha中存储ES6函数导入

时间:2017-01-11 20:21:56

标签: node.js mocha babeljs sinon supertest

我试图通过supertest库请求在快速路由器中的某个路由上调用存根函数。我看到函数foo被正确调用,不幸的是它没有被我在测试中写的存根函数所取代。代码是用ES6编写的,我使用babel-register和babel-polyfill来使其工作。

我使用测试脚本     ./node_modules/mocha/bin/mocha server --timeout 10000 --compilers js:babel-register --require babel-polyfill --recursive

router.js

import {foo} from '../controller';
const router = new Router();
router.route(ROUTE).post(foo);

controller.js

export function foo(req, res) {
    res.status(200).send({
        ok: 'ok'
    });
}

test.js

import request from 'supertest';
import sinon from 'sinon';
import {app} from 'app';
import * as controller from 'controller';

const agent = request.agent(app);
describe('Admin routes tests', () => {
    it('Tests login admin route', async () => {
    const bar = () => {
        console.log('bar');
    };
    sinon.stub(controller, 'foo', bar);
    const req = await agent
        .post(ROUTE)
        .set('Accept', 'application/json');
    console.log(stub.calledOnce); // false
    });
});

非常感谢任何帮助。

1 个答案:

答案 0 :(得分:1)

这是解决方案:

app.js

import express from "express";
import * as controller from "./controller";

const app = express();

app.post("/foo", controller.foo);

export { app };

controller.js

export function foo(req, res) {
  res.status(200).send({ ok: "ok" });
}

test.js

import request from "supertest";
import sinon from "sinon";
import * as controller from "./controller";
import { expect } from "chai";

describe("Admin routes tests", () => {
  it("Tests login admin route", (done) => {
    const bar = () => {
      console.log("bar");
    };
    const fooStub = sinon.stub(controller, "foo").callsFake(bar);
    const { app } = require("./app");
    const agent = request.agent(app);
    agent
      .post("/foo")
      .set("Accept", "application/json")
      .timeout(1000)
      .end((err, res) => {
        sinon.assert.calledOnce(fooStub);
        expect(res).to.be.undefined;
        expect(err).to.be.an.instanceof(Error);
        done();
      });
  });
});

由于对foo控制器进行了存根处理,并且其返回值为undefined。对于supertest,没有响应,例如res.send(),服务器将挂起直到mocha测试超时,这将导致测试失败。

.mocharc.yml

recursive: true
require: ts-node/register
timeout: 2000
diff: true
inline-diffs: true

我们添加.timeout(1000)来进行超级测试,因为我们知道它会超时(您将foo控制器与bar相乘)。并且,对此超时错误进行断言。

具有覆盖率报告的集成测试结果:

  Admin routes tests
bar
    ✓ Tests login admin route (1341ms)


  1 passing (1s)

---------------|----------|----------|----------|----------|-------------------|
File           |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
---------------|----------|----------|----------|----------|-------------------|
All files      |    95.65 |      100 |       80 |    95.65 |                   |
 app.ts        |      100 |      100 |      100 |      100 |                   |
 controller.ts |       50 |      100 |        0 |       50 |                 2 |
 test.ts       |      100 |      100 |      100 |      100 |                   |
---------------|----------|----------|----------|----------|-------------------|

源代码:https://github.com/mrdulin/mocha-chai-sinon-codelab/tree/master/src/stackoverflow/41600031