在为以下代码S3resizer
编写测试时,当我调用S3getStub
时, stub testedModule
似乎不起作用,我从mocha AssertionError: expected stub to have been called at least once, but it was never called
获得了响应。
为什么S3resizer_get
不 stub ?s3Handler
:
'use strict';
var s3 = new (require('aws-sdk')).S3();
var S3Handler = {};
S3Handler._get = function (bucketName, imgName, callback) {
var params = {
Bucket: bucketName,
Key: imgName
};
s3.getObject(params, function (error, data) {
if (error) {
console.log("Error, %s", error);
callback(error, null);
}
console.log("good data");
callback(null, data);
});
};
module.exports = S3Handler;
S3resizer
:/**
* This function is called when the protocol defined in index.js is "s3:".
*/
'use strict';
var async = require('async');
var S3 = require("./S3Handler");
var S3get = S3._get;
var S3put = S3._put;
var read = require("./readDirectory");
var readDirFile = read._get;
var readDirCont = read._getContent;
var rs = require("./resizer").resize;
var _sqs = require("./sqsHandler");
var sqsSend = _sqs._sendMessage;
var S3resizer = {};
S3resizer.rs = function (imgName, bucketName) {
S3get(bucketName, imgName, function (error, data) {console.log(data);});
};
module.exports = S3resizer;
tests
:var chai = require('chai');
var sinonChai = require("sinon-chai");
var expect = chai.expect;
var extend = require('lodash').extend;
var sinon = require('sinon');
chai.use(sinonChai);
var proxyquire = require('proxyquire').noPreserveCache();
var url = require('url');
var mockDir = require('mock-fs');
describe("S3resizer", function () {
var testedModule, fakeResponse, fakeFiles, S3getStub, rsStub, readDirFileStub, readDirContStub, S3putStub, sqsCreateStub, sqsSendStub, cbSpy, callbSpy, imgName, bucketName, sizesObj, imageType, obj;
before(function () {
S3getStub = sinon.stub();
rsStub = sinon.stub();
readDirContStub = sinon.stub();
readDirFileStub = sinon.stub();
S3putStub = sinon.stub();
sqsCreateStub = sinon.stub();
sqsSendStub = sinon.stub();
cbSpy = sinon.spy();
callbSpy = sinon.spy();
testedModule = proxyquire('../S3resizer', {
'./S3Handler': {
_get: S3getStub,
_put: S3putStub
},
'./readDirectory': {
_get: readDirFileStub,
_getContent: readDirContStub
},
'./resizer': {
resize: rsStub
},
'./sqsHandler': {
_sendMessage: sqsSendStub
},
});
imgName = "Whatever";
bucketName = "Chappie";
sizesObj = [
{ width: 800, height: 800, name: 'large' },
{ width: 500, height: 500, name: 'medium' },
{ width: 200, height: 200, name: 'small' },
{ width: 45, height: 45, name: 'thumbnail'}
];
imageType = "png";
obj = {
"event":"re-sized",
"message": {
"url":"S3://bucketname/images/908798",
"sizes":["large","medium","small","thumbnail"]
}
};
fakeResponse = {Body: 'image content'};
fakeFiles = ["thumbnail_Whatever", "small_Whatever", "medium_Whatever", "large_Whatever"];
});
it("calls callback with message 'Done'", function () {
S3getStub.callsArgWith(2, null, fakeResponse);
testedModule.rs(imgName, bucketName);
expect(S3getStub).has.been.called;
});
});
最佳答案
从the fine manual:
您在告诉proxyquire捕获./S3Handler
的require,实际上S3Resizer
正在加载./S3Handler.js
(包括.js
)。那不完全一样。