28

我正在尝试为使用aws-sdk将事物推送到 SQS 队列的 NPM 模块的应用程序编写一些测试覆盖率，但我不确定如何正确地模拟事物。

到目前为止，这是我的测试：

var request = require('superagent'),
    expect = require('chai').expect,
    assert = require('chai').assert,
    sinon = require('sinon'),
    AWS = require('aws-sdk'),
    app = require("../../../../app");

describe("Activities", function () {

    describe("POST /activities", function () {

        beforeEach(function(done) {
            sinon.stub(AWS.SQS.prototype, 'sendMessage');

            done();
        });

        afterEach(function(done) {
            AWS.SQS.prototype.sendMessage.restore();

            done();
        });

        it("should call SQS successfully", function (done) {
            var body = {
                "custom_activity_node_id" : "1562",
                "campaign_id" : "318"
            };

            reqest
            .post('/v1/user/123/custom_activity')
            .send(body)
            .set('Content-Type', 'application/json')
            .end(function(err, res) {
                expect(res.status).to.equal(200)

                assert(AWS.SQS.sendMessage.calledOnce);
                assert(AWS.SQS.sendMessage.calledWith(body));
            });
        });

    });

});

我看到的错误是：

  1) Activities POST /activities "before each" hook:
     TypeError: Attempted to wrap undefined property sendMessage as function

  2) Activities POST /activities "after each" hook:
     TypeError: Cannot call method 'restore' of undefined

当谈到或在 JavaScript 中模拟对象时，我有点新手，所以请原谅我的无知sinon.stub

4

8 回答 8

26

这就是我使用 sinonjs 存根 AWS-SDK 的方式

import AWS from 'aws-sdk'
import sinon from 'sinon'

let sinonSandbox

const beforeEach = (done) => {
   sinonSandbox = sinon.sandbox.create()
   done()
}

const afterEach = done => {
   sinonSandbox.restore()
   done()
} 
lab.test('test name', (done) => {
    sinonSandbox.stub(AWS, 'SQS')
      .returns({
        getQueueUrl: () => {
          return {
            QueueUrl: 'https://www.sample.com'
          }
        }
    })
    done()
})

基本上我控制来自主 SQS 的所有方法。希望这会对某人有所帮助

于 2017-11-20T07:41:49.287 回答
23

我们创建了一个aws-sdk-mock npm 模块，它模拟了所有 AWS 开发工具包服务和方法。 https://github.com/dwyl/aws-sdk-mock

它真的很容易使用。只需使用服务、方法和存根函数调用 AWS.mock。

AWS.mock('SQS', 'sendMessage', function(params, callback) {
    callback(null, 'success');
});

然后通过调用在测试后恢复方法：

AWS.restore('SQS', 'sendMessage');
于 2016-02-10T20:53:02.693 回答
6

我认为问题在于 AWS SDK 类是从 JSON 配置动态构建的。这是 SQS 的一个：Github。

所有 API 调用最终都归结为ServicemakeRequest或makeUnauthenticatedRequest在Service上，所以我只是将那些使用withArgs(...). 例如：

var stub = sinon.stub(AWS.Service.prototype, 'makeRequest');
stub.withArgs('assumeRole', sinon.match.any, sinon.match.any)
    .yields(null, fakeCredentials);

这适用于我的简单用例。

于 2016-11-07T23:59:03.140 回答
4

您可以使用以下方法使用 Sinon 存根 AWS 开发工具包方法

  1. 包装 AWS 开发工具包实例并允许在外部设置 this：

    //Within say, SqsService.js
var Aws = require('aws-sdk');

exports.sqsClient = new Aws.SQS({
    region: <AWS_REGION>,
    apiVersion: <API_VERSION>,
    accessKeyId: <AWS_ACCESS_KEY_ID>,
    secretAccessKey: <AWS_SECRET_KEY>
});

  2. 使用 时sqsClient，请确保改用包装的实例。

    var SqsService = require('./SqsService');

function (message, callback) {
    //Do stuff..
    //Then send stuff..
    SqsService.sqsClient.sendMessage(message, callback);
});

  3. 因此，使用包装好的 AWS 开发工具包从上面修改您的测试用例：

    var request = require('superagent'),
    expect = require('chai').expect,
    assert = require('chai').assert,
    sinon = require('sinon'),
    SqsService = require('./SqsService'), //Import wrapper
    app = require("../../../../app");

describe("Activities", function () {

    describe("POST /activities", function () {

        var sendMessageStub;

        beforeEach(function(done) {
            //Stub like so here
            sendMessageStub = sinon.stub(SqsService.sqsClient, 'sendMessage').callsArgWith(1, null, { MessageId: 'Your desired MessageId' });

            done();
        });

        afterEach(function(done) {
            sendMessageStub.restore();

            done();
        });

        it("should call SQS successfully", function (done) {
            var body = {
                "custom_activity_node_id" : "1562",
                "campaign_id" : "318"
            };

            reqest
                .post('/v1/user/123/custom_activity')
                .send(body)
                .set('Content-Type', 'application/json')
                .end(function(err, res) {
                    expect(res.status).to.equal(200)

                    assert(sendMessageStub.calledOnce);
                    assert(sendMessageStub.calledWith(body));
            });
        });
    });
});
于 2015-02-26T07:25:55.613 回答
4

您可以使用以下方法在不引入任何额外库的情况下做到这一点：

const mocha = require('mocha'),
    chai = require('chai'),
    expect = chai.expect,    // Using Expect style
    sinon = require('sinon'),
    AWS = require('aws-sdk');

describe('app', function () {
    var aws, sqs, app,
        sendMessageError = null,
        sendMessageData = { MessageId: "1" };
    before(() => {
        // Create a stub for the SQS lib
        sqs = sinon.stub({ sendMessage: Function() });
        // Make sure that when someone calls AWS.SQS they get our stub
        aws = sinon.stub(AWS, 'SQS');
        aws.returns(sqs);
        // Now include your app since it will `require` our stubbed version of AWS
        app = require('./app');
    });
    after(() => {
        aws.restore(); // Be kind to future tests
    });
    beforeEach(() => {
        // Reset callback behavior after each test
        sqs.sendMessage.reset();
        // Call the callback supplied to sendMessage in the 1st position with the arguments supplied
        sqs.sendMessage.callsArgWith(1, sendMessageError, sendMessageData);
    });
    it('sends messages', () => {
        // Pretend you're using Promises in your app, but callbacks are just as easy
        return app.sendMessage().then(() => {
            const args = sqs.sendMessage.getCall(0).args[0];
            expect(args.QueueUrl).to.be.eq('http://127.0.0.1/your/queue/url');
        });
    });
});
于 2017-07-18T03:21:54.117 回答
2

我无法确切告诉您为什么 Sinon 无法对 aws sdk 进行存根（也许一些 JS 专家可以更好地解释这一点），但它与proxyquire一起工作得很好。

代理 nodejs 的要求是为了在测试期间轻松覆盖依赖项，同时保持完全不显眼。

于 2015-02-20T13:17:25.467 回答
1

我喜欢使用承诺，在上面@kdlcruz 的回答的基础上，我做了这样的事情：

import AWS from 'aws-sdk'
import sinon from 'sinon'

let sinonSandbox

const beforeEach = (done) => {
   sinonSandbox = sinon.sandbox.create()
   done()
}

const afterEach = done => {
   sinonSandbox.restore()
   done()
} 

function mockAWSCall(service, method, expectedArgs, response) {
    var stubDef = {};
    stubDef[method] = function(args) {
        if(expectedArgs) {
            expect(args).to.deep.equal(expectedArgs);
        }
        return {
            promise: () => {
                return new Promise(function (resolve, reject) {
                    if(response.startsWith("ERROR:")) {
                        reject(response);
                    } else {
                        resolve(response);
                    }
                });
            }
        };
    };

    sinonSandbox.stub(AWS, service).returns(stubDef);
}

lab.test('test name', (done) => {
    mockAWSCall('SQS', 'sendMessage', {
        MessageBody: 'foo', QueueUrl: 'http://xxx'
    }, 'ok');
    // Do something that triggers the call...
    done()
})
于 2018-03-13T15:47:18.513 回答
0

使用AWS SDK v3，它变得更加容易。它甚至可以直接使用 Promise，而无需创建嵌入式存根对象。

  sinon.stub(SQS.prototype, 'sendMessage').resolves({
    SequenceNumber: '0',
  });

  const sqs = new SQS({});
  const result = await sqs.sendMessage({
    MessageBody: '',
    QueueUrl: '',
  });

  expect(SQS.prototype.sendMessage).to.be.calledOnce;
  expect(result.SequenceNumber).to.be('0');
于 2020-12-17T16:48:36.283 回答