added unit test framework and unit test github action

.github/workflows/test-app-nodejs.yml

@@ -0,0 +1,33 @@
+name: Test App - Node.js
+
+on:
+  push:
+    paths:
+      - 'app/**'
+  pull_request:
+    paths:
+      - 'app/**'
+  workflow_dispatch:
+
+jobs:
+  test-app:
+    name: 'Test Node.js App'
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        shell: bash
+        working-directory: 'app'
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+
+    - name: NPM Install
+      run: npm install
+
+    - name: NPM Test
+      run: npm test

app/app.js

@@ -27,6 +27,6 @@ require('./api/v2.js')(app)
 swagger(app)
 
 const port = process.env.PORT || 8080;  
-app.listen(port, () => {  
+module.exports = app.listen(port, () => {
     console.log(`Server running on port ${port}`);  
-});  
+});

app/package.json

@@ -1,10 +1,16 @@
 {
   "dependencies": {
     "@azure/openai": "^1.0.0-beta.11",
+    "chai": "^4.4.1",
+    "chai-http": "^4.4.0",
     "cors": "^2.8.5",
     "dotenv": "^16.4.5",
     "express": "^4.18.3",
+    "mocha": "^10.3.0",
     "swagger-jsdoc": "^6.2.8",
     "swagger-ui-express": "^5.0.0"
+  },
+  "scripts": {
+    "test": "mocha test/*.js --exit"
   }
 }

app/test/test-webapp.js

@@ -0,0 +1,18 @@
+const chai = require('chai'),
+      expect = chai.expect,
+      chaiHttp = require('chai-http')
+
+chai.use(chaiHttp)
+
+const app = require('../app.js')
+
+describe('AIChatUI Web App', function() {
+  it('should respond with a 200 status code', function(done) {
+    chai.request(app)
+      .get('/')
+      .end(function(err, res) {
+        expect(res).to.have.status(200);
+        done();
+      });
+  });
+});

app/test/test.js

@@ -0,0 +1,8 @@
+const assert = require('assert')
+describe('Array', function () {
+  describe('#indexOf()', function () {
+    it('should return -1 when the value is not present', function () {
+      assert.equal([1, 2, 3].indexOf(4), -1);
+    });
+  });
+});