multi-device-test.js

const csvparse = require("csv-parse/lib/sync");
const deviceAPI = require("./device-api");
const expect = require("chai").expect;
const fs = require("fs");
const metrics = require("datadog-metrics");
const vdk = require("virtual-device-sdk");

// We use the very nice dotenv module to setup our environment variables
// It looks in the <PROJECT_DIR>/.env file for environment values so we don't have to set them up everytime
require("dotenv").config();

describe("multiple devices", function() {
    // Increase the timeout for these tests to 60 seconds
    this.timeout(60000);
    const virtualDevice = new vdk.VirtualDevice(process.env.VIRTUAL_DEVICE_TOKEN); 

    // Read the device names from a CSV
    const devices = csvparse(fs.readFileSync("devices.csv"));
	
    for (const deviceArray of devices) {
        const deviceName = deviceArray[0];
        const deviceID = deviceName.split(" ").join("-");
	
        describe(`turn on and off ${deviceName}`, function() {
            afterEach(async function() {
                // Turn off the device after each test
                return virtualDevice.message(`turn off ${deviceName}`);
            });

            it("should toggle without error", async function() {
                // To interact with a Bespoken Virtual Device, sign up and create one at:
                //	https://apps.bespoken.io/dashboard
                // They virtual devices allow you to talk to Alexa and Google Assistant programmatically  
                // The token once created should be set as an environment variable named VIRTUAL_DEVICE_TOKEN
                const response = await virtualDevice.message(`turn on ${deviceName}`);

                const successAlexa = response.transcript.includes("ok");
				
                // Check the device API to ensure it also worked
                // In this case, we use a simple mock - but just substitute in your real API here
                const state = deviceAPI.getState(process.env.DEVICE_API_KEY, deviceID)
                const successDevice = state.status === "ON";

                // Send the stats to Data Dog [Optional step]
                // Leveraging DataDog is great for advanced reporting and notifications
                sendToDataDog(deviceID, successAlexa, successDevice);

                // Do our assertions
                expect(successAlexa, "Call to Alexa failed: " + response.transcript).to.be.true;
                expect(successDevice, "Device state was not set properly").to.be.true;
            });
        });
    }
});

// Here we increment a counter everytime we have success interacting with the device
// Using the counter, we can see the results over time as well as trigger notifications if too many tests fail				
function sendToDataDog(deviceID, successAlexa, successDevice) {
    if (process.env.DATADOG_API_KEY) {
        metrics.init({ host: deviceID, prefix: "device." });
        if (successAlexa) {
            metrics.increment("alexa.success");
        } else {
            metrics.increment("alexa.failure");
        }

        if (successDevice) {
            metrics.increment("api.success");
        } else {
            metrics.increment("api.failure");
        }
        metrics.flush();
    }
}