Test Database Environment

# .env.test
NODE_ENV=test
DATABASE_URL_TEST=postgresql://app:secret@localhost:5433/todo_test

# test command
DATABASE_URL=$DATABASE_URL_TEST pnpm test:e2e

function requireTestDatabaseUrl(): string {
  const url = process.env.DATABASE_URL_TEST;

  if (!url || !url.includes("todo_test")) {
    throw new Error("E2E requires a dedicated test database");
  }

  return url;
}