DB - Removed some template code and also tests to metrics helper

app.js

@@ -1,36 +1,20 @@
-var createError = require('http-errors');
-var express = require('express');
-var logger = require('morgan');
+const createError = require('http-errors');
+const express = require('express');
+const logger = require('morgan');
+
+const app = express();
+const client = require('prom-client');
 
 const lighthouse = require('./plugins/lighthouse');
 const pageSpeedInsights = require('./plugins/page-speed-insights');
 
-var app = express();
-
-app.use(logger('dev'));
-app.use(express.json());
-app.use(express.urlencoded({ extended: false }));
-
-const client = require('prom-client');
-
 const collectDefaultMetrics = client.collectDefaultMetrics;
 const Registry = client.Registry;
 const register = new Registry();
 
-// collectDefaultMetrics({ register });
-
-const gauge = new client.Gauge({ name: 'metric_name', help: 'metric_help' });
-const counter = new client.Counter({
-  name: 'metric_name2',
-  help: 'metric_help32'
-});
-
-counter.inc(Math.random() * 100);
-
-app.get('/count', (req, res) => {
-  counter.inc(Math.random() * 100);
-  res.send(200);
-});
+app.use(logger('dev'));
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
 
 app.get('/metrics', (req, res) => {
 	res.set('Content-Type', register.contentType);

package.json

@@ -4,7 +4,8 @@
   "private": true,
   "scripts": {
     "start": "node ./bin/www",
-    "test": "PAGE_SPEED_INSIGHTS_KEY=PAGE_SPEED_INSIGHTS_KEY LIGHTHOUSE_API_KEY=LIGHTHOUSE_API_KEY jest"
+    "test": "PAGE_SPEED_INSIGHTS_KEY=PAGE_SPEED_INSIGHTS_KEY LIGHTHOUSE_API_KEY=LIGHTHOUSE_API_KEY jest",
+    "test:watch": "PAGE_SPEED_INSIGHTS_KEY=PAGE_SPEED_INSIGHTS_KEY LIGHTHOUSE_API_KEY=LIGHTHOUSE_API_KEY jest --watch"
   },
   "dependencies": {
     "debug": "~2.6.9",

utils/metrics/index.js

@@ -6,8 +6,6 @@ const raiseMetric = (name, product, value) => {
 
     if(!metrics[name]){
 
-        console.log(client)
-
         metrics[name] = new client.Gauge({ 
             name: name,
             help: 'metric_help',
@@ -17,6 +15,8 @@ const raiseMetric = (name, product, value) => {
 
       metrics[name].set({ product }, parseFloat(value));
 
+      return metrics;
+
 };
 
 module.exports = {

utils/metrics/spec.js

@@ -0,0 +1,27 @@
+const { raiseMetric } = require('./');
+
+describe('metrics helper', () => {
+
+    describe('raiseMetric', () => {
+
+        it('sets a new promethus Gauge with the given name, product and value', () => {
+
+            const metrics = raiseMetric('test', 'test-product', 10);
+
+            expect(metrics['test']).toEqual(expect.objectContaining({
+                name: 'test',
+                labelNames: ['product'],
+                help: 'metric_help',
+                aggregator: 'sum',
+                hashMap: {
+                    'product:test-product': expect.objectContaining({
+                        value: 10
+                    })
+                }
+            }));
+
+        });
+
+    });
+
+});