使用 proxyquire 进行存根 [英] Stubbing with proxyquire

问题描述

我将如何使用 proxyquire 和 sinon 存根以下模块:

How would I stub the following module with proxyquire and sinon:

var email = require("emailjs").server.connect.send();

我执行了以下操作，但它不起作用，因为当我尝试在 send() 中触发错误时，它仍会发送电子邮件.

I did the following, but its not working, because when I try to trigger an error within send() it still sends the email.

sendMailStub = sinon.stub(email, "send");    
testedModule = proxyquire('../index.js', {
                'email': {
                    'server': {
                        'send': sendMailStub
                        }
                    }
            });

也试过了:

testedModule = proxyquire('../index.js', {
            email: {send: sendMailStub}
        });

这是迄今为止的完整测试，失败了:

This is the full test so far, which fails:

var chai = require('chai');
var sinonChai = require("sinon-chai");
var sinon = require('sinon');
chai.use(sinonChai);
var proxyquire = require('proxyquire');
var testedModule;
var expect = chai.expect;



describe('invoicer', function () {

    var nock = require('nock');

    var ResponseOptions = {
        username: "Peter Pan",
        user_address_line_1: "Never Never Land",
        user_address_line_2: "Tree-house 99",
        user_post_code: "E4 9BY",
        delivery_address_line_1: "Hook's Boat",
        delivery_address_line_2: "Dock 69",
        delivery_post_code: "SE2 4C",
        order_number: "234234234",
        order_date: "20/12/2090",
        dispatch_date: "20/12/2090",
        items: [
            {
                product_name: "Fairy Dust",
                brand: "Airy fairy",
                quantity: 5,
                total: 2000
            },
            {
                product_name: "Pirate Sword",
                brand: "Pirate's Bay",
                quantity: 8,
                total: 2000
            }
        ],
        grand_total: 4000,
        user_email: "[e-mail]"
    }

    var mailOptions = {
        text: "Hello World"
    }

    var scope = nock("http://somewhere.com")
        .get("/orders")
        .reply(200, ResponseOptions);

    var sendStub, readFileStub, url, contextDoneSpy, obj, connectStub;

    before(function () {

        readFileStub = sinon.stub();
        sendStub = sinon.stub().withArgs(mailOptions).callsArgWith(1, null, contextDoneSpy);
        connectStub = sinon.stub().returns({
            send: sendStub
        });

        testedModule = proxyquire('../index', {
            'fs': {readFile: readFileStub},
            'emailjs': {
                'server': {
                    'connect': connectStub
                }
            }
        });

        url = "http://somewhere.com/orders";
        contextDoneSpy = sinon.spy();
        obj = {
            user: 'AKIAJMHSJRRYGKTE4TOQ',
            password: 'Ag3Nkpej8dxZ4DwYz2in/x8kUhN7Lh/BqXImB0+i+DWy',
            host: "email-smtp.eu-west-1.amazonaws.com",
            port: 587,
            tls: true,
            ssl: false
        }

        readFileStub.withArgs('./email.html').callsArgWith(1, null, 'file1');

        connectStub();
    });

    it("readFile and successful context.done were called", function (done) {
        testedModule.Invoicer(url, obj, { done: function () {
            contextDoneSpy.apply(null, arguments);
            expect(readFileStub).has.been.called;
            expect(contextDoneSpy).to.have.been.called;
            done();
        }});

    });
});

推荐答案

让我们首先使用 文档

require("emailjs").server.connect({
  /* Required server options */
}).send(function (err, message) {
  // This a function with a callback node convention signature
});

connect 是一个函数，应该接收一些参数，而且 send 不返回任何东西，基本上是调用回调

connect is a function and should receive some parameters, moreover send doesn't return any thing, basically call a callback

Proxyquire 需要使用相同的模块名称，所以 email 应该是 emailjs，另一方面你在 proxiquire，应该是

Proxyquire requires to use the same module name, so email should be emailjs, on the other hand you're wrong assigning the stub in proxiquire, it should be

connectStub = sinon.stub().returns(sendStub);
sendMailStub = sinon.stub(email, "send");    
testedModule = proxyquire('../index.js', {
            'emailjs': {
                'server': {
                    'connect': connectStub
                }
        });

这篇关于使用 proxyquire 进行存根的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！