#335 test: add basic concurrent trainer login and passthrough stress …

…test structure as separate node project

testing/backend-stress/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "backend-stress",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "build": "tsc"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module",
+  "dependencies": {
+    "axios": "^1.7.7",
+    "performance-now": "^2.1.0",
+    "ws": "^8.18.0"
+  },
+  "devDependencies": {
+    "@types/node": "^22.7.4",
+    "@types/ws": "^8.5.12",
+    "typescript": "^5.6.2"
+  }
+}

testing/backend-stress/src/exercise.js

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+import { parentPort, workerData } from "worker_threads";
+import axios from "axios";
+import now from "performance-now";
+import {SocketTrainer} from "./sockets/SocketTrainer.js"
+// import {NUM_TRAINER_PER_EXERCISE} from "./main.js";
+
+async function simulateExercise(userIndex) {
+	const trainerName = `testuser${crypto.randomUUID()}`
+
+	const startTime = now();
+
+	try {
+		const response = await axios.post(`https://klinik-dps.de/api/trainer/login`, {
+			username: trainerName,
+			password: 'password123'
+		});
+		const token = response.data.token;
+
+		const socketTrainer = new SocketTrainer('https://klinik-dps.de/ws/trainer/?token=')
+
+		await new Promise(resolve => {
+			socketTrainer.connect(token, response => resolve(response));
+		});
+
+		socketTrainer.testPassthrough((message) => {console.log(message)})
+
+		const endTime = now();
+
+		parentPort.postMessage({
+			userIndex,
+			responseTime: endTime - startTime,
+			success: true
+		});
+	} catch (error) {
+		parentPort.postMessage({
+			userIndex,
+			responseTime: now() - startTime,
+			success: false,
+			error: error.message
+		});
+	}
+}
+
+simulateExercise(workerData.userIndex);