Modifying the Add Function

README.md

@@ -3,6 +3,7 @@ Calculator.js: a node.js Demonstration Project
 An example node.js project, including tests with mocha, that behaves like
 a pocket calculator.
 
+[![Build Status](https://dev.azure.com/k200342/Integrating%20External%20Source%20Control%20with%20Azure%20Pipelines/_apis/build/status%2FAmmar-Siddique.calculator?branchName=master)](https://dev.azure.com/k200342/Integrating%20External%20Source%20Control%20with%20Azure%20Pipelines/_build/latest?definitionId=2&branchName=master)
 The project contains a simple node.js application that exposes REST APIs
 to perform arithmetic on integers, and provides a test suite with mocha
 and chai.  The `mocha-junit-reporters` package is included to provide XML

api/controllers/arithmeticController.js

@@ -11,7 +11,7 @@ exports.calculate = function(req, res) {
   });
 
   var operations = {
-    'add':      function(a,b) { return +a + +b },
+    'add':      function(a,b) { return +a + +b }, // Using + operator to type cast variables as integers in order to prevent string concatenation.
     'subtract': function(a,b) { return a - b },
     'multiply': function(a,b) { return a * b },
     'divide':   function(a,b) { return a / b },

azure-pipelines.yml

@@ -0,0 +1,22 @@
+# Node.js
+# Build a general Node.js project with npm.
+# Add steps that analyze code, save build artifacts, deploy, and more:
+# https://docs.microsoft.com/azure/devops/pipelines/languages/javascript
+
+trigger:
+- master
+
+pool:
+  vmImage: ubuntu-latest
+
+steps:
+- task: NodeTool@0
+  inputs:
+    versionSpec: '10.x'
+  displayName: 'Install Node.js'
+
+- script: |
+    npm install
+    npm run build
+    npm test
+  displayName: 'npm install, build, and test'