2.2.9 Testing & QA

Unit Tests:

• Jest or Mocha + Chai to test controllers, services, model logic.

2. Integration Tests:

• Supertest to simulate HTTP calls on the Express server.

• Mock external APIs (crypto market data, Etherscan) to ensure reliability.

3. Load Testing:

• Tools like Artillery or k6 to simulate high concurrency (chat messages, rapid trade events).

• Evaluate performance bottlenecks and memory usage.