add test, and fix script

src/__tests__/setup.ts

@@ -0,0 +1,17 @@
+// Test setup file for Jest
+// Mock environment variables
+process.env.NODE_ENV = 'test';
+process.env.DB_HOST = 'localhost';
+process.env.DB_PORT = '3306';
+process.env.DB_USERNAME = 'test';
+process.env.DB_PASSWORD = 'test';
+process.env.DB_DATABASE = 'test_db';
+
+// Mock console methods to reduce noise in tests
+global.console = {
+  ...console,
+  error: jest.fn(),
+  warn: jest.fn(),
+  info: jest.fn(),
+  log: jest.fn(),
+};