chore: refactor typescript test (GoogleCloudPlatform#1699)

Author: sofisl

appengine/typescript/index.ts

@@ -20,6 +20,8 @@ app.get("/", (req, res) => {
  res.send("🎉 Hello TypeScript! 🎉");
 });
 
-app.listen(PORT, () => {
+const server = app.listen(PORT, () => {
  console.log(`App listening on port ${PORT}`);
 });
+
+module.exports = server;

appengine/typescript/package.json

@@ -11,7 +11,7 @@
  "scripts": {
  "prepare": "npm run gcp-build",
  "pretest": "npm run gcp-build",
- "test": "repo-tools test app -- index.js", 
+ "test": "mocha test/*.test.js --exit",
  "posttest": "npm run lint",
  "lint": "tslint -p .",
  "start": "node ./index.js",
@@ -23,8 +23,10 @@
  "typescript": "^3.0.1"
  },
  "devDependencies": {
- "@google-cloud/nodejs-repo-tools": "^3.3.0",
+ "mocha": "^7.0.0",
+ "wait-port": "^0.2.7",
  "@types/express": "^4.16.0",
+ "chai": "^4.2.0",
  "tslint": "^6.0.0"
  }
 }

appengine/typescript/test/app.test.js

@@ -0,0 +1,13 @@
+const waitPort = require('wait-port');
+const {expect} = require('chai');
+
+const PORT = process.env.PORT || 8080;
+
+describe('server listening', () => {
+ it('should be listening', async () => {
+ const server = require('../index.js');
+ const isOpen = await waitPort({port: PORT});
+ expect(isOpen).to.be.true;
+ server.close();
+ });
+});