Add integration tests for CI (#78)

Add integration tests for Heroku CI

index.js

@@ -16,5 +16,3 @@ app.get('/', function(request, response) {
 app.listen(app.get('port'), function() {
   console.log('Node app is running on port', app.get('port'));
 });
-
-

package.json

@@ -7,12 +7,17 @@
   },
   "main": "index.js",
   "scripts": {
-    "start": "node index.js"
+    "start": "node index.js",
+    "test": "node test.js"
   },
   "dependencies": {
     "ejs": "2.5.6",
     "express": "4.15.2"
   },
+  "devDependencies": {
+    "request": "^2.81.0",
+    "tape": "^4.7.0"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/heroku/node-js-getting-started"

test.js

@@ -0,0 +1,28 @@
+const { spawn } = require('child_process');
+const request = require('request');
+const test = require('tape');
+
+// Start the app
+const env = Object.assign({}, process.env, {PORT: 5000});
+const child = spawn('node', ['index.js'], {env});
+
+test('responds to requests', (t) => {
+  t.plan(4);
+
+  // Wait until the server is ready
+  child.stdout.on('data', _ => {
+    // Make a request to our app
+    request('http://127.0.0.1:5000', (error, response, body) => {
+      // stop the server
+      child.kill();
+
+      // No error
+      t.false(error);
+      // Successful response
+      t.equal(response.statusCode, 200);
+      // Assert content checks
+      t.notEqual(body.indexOf("<title>Node.js Getting Started on Heroku</title>"), -1);
+      t.notEqual(body.indexOf("Getting Started with Node on Heroku"), -1);
+    });
+  });
+});