用dwyl/aws-sdk-mock模擬AWS不起作用

首先，我不使用lambda，所以我認爲this thread不是同一個問題。用dwyl/aws-sdk-mock模擬AWS不起作用

我得到這個錯誤在before鉤：

TypeError: Attempted to wrap undefined property S3 as function 
     at checkWrappedMethod (node_modules/aws-sdk-mock/node_modules/sinon/lib/sinon/util/core.js:78:29) 
     at Object.wrapMethod (node_modules/aws-sdk-mock/node_modules/sinon/lib/sinon/util/core.js:121:21) 
     at Object.stub (node_modules/aws-sdk-mock/node_modules/sinon/lib/sinon/stub.js:67:26) 
     at mockService (node_modules/aws-sdk-mock/index.js:67:27) 
     at Object.AWS.mock (node_modules/aws-sdk-mock/index.js:43:5) 
     at Context.<anonymous> (myModule.spec.js:14:9)

我從來沒有使用此模塊之前我也不有sinon.js很多經驗。

這裏是我的模塊：

var AWS = require('aws-sdk') 
const https = require('https') 

module.exports = function() { 
    var s3 = new AWS.S3({ 
     httpOptions: { 
     agent: new https.Agent() 
     }, 
     signatureVersion: 'v4' 
    }) 
    return s3.getObject({Bucket: 'somebucket', Key: 'somekey'}).promise() 
}

這裏是我的測試腳本：

const chai = require('chai') 
const chaiAsPromised = require('chai-as-promised') 

const AWS = require('aws-sdk-mock') 
const myFunc = require('./myModule') 

chai.use(chaiAsPromised) 
const expect = chai.expect 
chai.should() 

describe('Get MMS API Key', function() { 

    before(function() { 
    AWS.mock('S3', 'getObject', function (params, callback) { 
     callback(null, 'dummy-data') 
    }) 
    }) 

    it('Should get dummy data', function() { 
    myFunc().should.eventually.equal('dummy-data') 
    }) 

    after(function() { 
    AWS.restore('S3', 'getObject') 
    }) 
})

的思考？

來源

2016-09-14 Henrique Barcelos