Question

我有一个在AWS上运行的NodeJS lambda函数。我想为exports.bidNotification = functions.database.ref('/notification/{pushId}').onWrite((event) => { const data = event.data; console.log('Notification received'); if(!data.changed()){ console.log('Nothing changed'); return; } const payLoad = { notification:{ title: 'App name', body: data.val().message, sound: "default" } }; const options = { priority: "high", timeToLive: 60*60 }; return admin.messaging().sendToDevice(data.val().token, payLoad, options); });函数编写一个简单的测试。

CODE

以下是.handler代码：

index.js

如果调用// importing dependencies var mySQLWriter = require('./mySQLWriterService'); exports.handler = function(event, context, callback) { console.log('Printing out JSON.stringify(event): '); console.log(JSON.stringify(event)); event.Records.forEach((record) => { if (record.eventName === 'INSERT') { console.log('We have an INSERT happening.'); mySQLWriter(record, callback); } }); };，我想写一个简单的测试。

使用Mocha和Chai，并在下面的dashmud的帮助下，我试图这样做，但它不起作用，这是我的mySQLWriter代码：

indexTests.js

当我进行测试时，我得到：

Answer 1

删除 chai 并使用 sinon

//const chai = require('chai');
//const expect = chai.expect;
const sinon = require('sinon');
//chai.use(sinon);
const SQLWriter = require('./mysqlwriterservice.js');
const appStart = require('./sinonsqlwriter');

describe('lambda function', () => {
  it('should call the mySQLWriter() function', () => {
      const spy = sinon.spy(SQLWriter, 'mySQLWriter');
      let event = {
        Records: [
          {
            eventName: 'INSERT',
            dynamodb: {
              NewImage: {
                DeviceId: { S: 'Device 000' },
                TimeStamp: { S: '2018-03-20T11:15:31.668Z' },
                Accuracy: { S: '5' },
                Latitude: { S: '53.639645' },
                Longitude: { S: '-1.782491' },
                Speed: { S: '1' },
              }
            }
          }
        ]
      };
      const context = {};

      appStart.handler(event, context, () => {
        console.log("Call count"+spy.callCount)
        //expect(spy).to.have.been.called();
      })
  });
});

// sinonsqlwriter.js

//导入依赖项

const SQLWriter = require('./mysqlwriterservice.js');

exports.handler = function(event, context, callback) {
  console.log('Printing out JSON.stringify(event): ');
  console.log(JSON.stringify(event));
  event.Records.forEach((record) => {
    if (record.eventName === 'INSERT') {
      console.log('We have an INSERT happening.');
      SQLWriter.mySQLWriter(record, callback);
      SQLWriter.mySQLWriter(record, callback);
    }
  });
  callback();
};

// mysqlwriterservice.js 我使用了共享链接中的代码。以下是更新答案：

Answer 2

您似乎没有调用处理程序函数，因此请尝试更改

appStart()

到

appStart.handler(someEvent)

Answer 3

您的appStart只是一个模块。您需要调用handler（appStart）内的index.js并在回调中进行断言。

const chai = require('chai');
const expect = chai.expect;
const spies = require('chai-spies');
chai.use(spies);
const appStart = require('../index');

describe('lambda function', () => {
  it('should call the mySQLWriter() function', done => {
      const spy = chai.spy.on(mySQLWriter, 'mySQLWriter');
      const event = {};
      const context = {};
      appStart.handler(event, context, () => {
        expect(spy).to.have.been.called();
        done();
      })
  });
});

根据评论和更新的问题进行更新：

根据您的屏幕截图，似乎mySQLWriterService.js导出一个具有mySQLWriter功能的对象。

这不起作用。

var mySQLWriter = require('./mySQLWriterService');

我认为应该是这样的：

const mySQLWriter = require('./mySQLWriterService').mysqlWriter;

（由于您未在mySQLWriterService.js中添加代码，我不能100％确定。）

P.S。不要使用var。如初。

测试：确保在AWS NodeJS Lamda函数中调用方法

3 个答案: