use new JS hello world app for cnb integration

Co-authored-by: Pavel Busko <pavel.busko@sap.com>

integration/assets/js-hello/index.js

@@ -0,0 +1,12 @@
+const http = require('http');
+
+const server = http.createServer((_req, res) => {
+  res.statusCode = 200;
+  res.setHeader('Content-Type', 'text/plain');
+  res.end('Hello World\n');
+});
+
+const port = process.env.PORT;
+server.listen(port, "0.0.0.0", () => {
+  console.log(`Server running at http://0.0.0.0:${port}/`);
+});

integration/assets/js-hello/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "js-hello",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "start": "node ./index.js"
+  }
+}

integration/helpers/app.go

@@ -129,6 +129,11 @@ func WithMultiBuildpackApp(f func(dir string)) {
 	f("../../assets/go_calls_ruby")
 }
 
+// WithJSHelloWorld creates a simple JS Hello World HTTP application to use with the CF push command.
+func WithJSHelloWorld(f func(dir string)) {
+	f("../../assets/js-hello")
+}
+
 // WithProcfileApp creates an application to use with your CLI command
 // that contains Procfile defining web and worker processes.
 func WithProcfileApp(f func(dir string)) {

integration/v7/isolated/app_command_test.go

@@ -409,14 +409,14 @@ applications:
 
 				When("the app is a CNB app", func() {
 					BeforeEach(func() {
-						helpers.WithProcfileApp(func(appDir string) {
-							Eventually(helpers.CF("push", appName, "-p", appDir, "--lifecycle", "cnb", "-b", "docker://gcr.io/paketo-buildpacks/ruby:latest")).Should(Exit())
+						helpers.WithJSHelloWorld(func(appDir string) {
+							Eventually(helpers.CF("push", appName, "-p", appDir, "--lifecycle", "cnb", "-b", "docker://gcr.io/paketo-buildpacks/nodejs:latest")).Should(Exit())
 						})
 					})
 
 					It("displays the app buildpacks", func() {
 						session := helpers.CF("app", appName)
-						Eventually(session).Should(Say(`paketo-buildpacks\/ruby`))
+						Eventually(session).Should(Say(`paketo-buildpacks\/nodejs`))
 						Eventually(session).Should(Exit(0))
 					})
 				})