Code for WP article 21st September 2017

index.js, index.spec.js

//i.js
'use strict';

console.log('Loading function');

exports.handler = (event, context, callback) => {
    console.log('Received event:', JSON.stringify(event, null, 2));
    console.log('value1x =', event.key1);
    console.log('value2x =', event.key2);
    console.log('value3x =', event.key3);
    var myEvent2 = { 'key99': '2001' }
    callback(null, myEvent2);  
    //callback('Something went wrong');
};

//i.spec.js
'use strict';
const LambdaTester = require('lambda-tester');
// Mocha using Chai
const expect = require('chai').expect;

const myHandler = require('../index').handler;
const nameSet = { key1: 'Fred', key2: 'Alison', key3: 'James' };
var returnValue = null;

var lambdaReturnHandler = function (message) {
    console.log(message);
}
// https://github.com/vandium-io/lambda-tester/blob/e04a0237e7b06a441029db5dfb416079b95bfccd/docs/callback.md
describe('lambda-tester sandbox', function () {
    it('returns the expected key and value', function () {
        return LambdaTester(myHandler)
            .event(nameSet)
            .expectResult((myEvent, additional) => {
                expect(myEvent.key99).to.exist;
                expect(myEvent.key99).to.equal('2001');
            });
    });
});