export declare class TestServer {
    private serverProcess;
    private port;
    private isRunning;
    constructor(port?: number);
    /**
     * Start the test server
     */
    start(): Promise<void>;
    /**
     * Stop the test server
     */
    stop(): Promise<void>;
    /**
     * Wait for the server to be ready
     */
    private waitForServer;
    /**
     * Get the base URL for the test server
     */
    getBaseUrl(): string;
    /**
     * Get URL for a specific test page
     */
    getUrl(path: string): string;
    /**
     * Check if server is running
     */
    get running(): boolean;
}
/**
 * Get or create the global test server instance
 */
export declare function getTestServer(): TestServer;
/**
 * Helper function to replace httpbin URLs with local test server URLs
 */
export declare function replaceHttpbinUrls(instruction: string, testServer: TestServer): string;