/**
 * Test helper utilities for DDP testing
 */
import { Client } from 'pg';
import type { IDatabaseConnection } from '../types';
/**
 * Test database configuration
 */
export declare const TEST_DB_CONFIG: IDatabaseConnection;
/**
 * Create a test database client
 */
export declare function createTestClient(): Promise<Client>;
/**
 * Clean up test database client
 */
export declare function cleanupTestClient(client: Client): Promise<void>;
/**
 * Execute SQL in test database
 */
export declare function executeTestSQL(sql: string): Promise<void>;
/**
 * Query test database
 */
export declare function queryTestDB<T = unknown>(sql: string, params?: unknown[]): Promise<T[]>;
/**
 * Check if test database is available
 */
export declare function isTestDatabaseAvailable(): Promise<boolean>;
/**
 * Reset test database schema
 */
export declare function resetTestSchema(): Promise<void>;
/**
 * Setup test database with sample data
 */
export declare function setupTestDatabase(): Promise<void>;
/**
 * Mock database connection for testing
 */
export declare function createMockConnection(): IDatabaseConnection;
/**
 * Mock client for testing
 */
export declare class MockClient {
    query: jest.Mock<any, any, any>;
    connect: jest.Mock<any, any, any>;
    end: jest.Mock<any, any, any>;
}
/**
 * Create a mock client with predefined responses
 */
export declare function createMockClient(responses?: unknown[]): MockClient;
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