import type { AnyFastifyInstance } from './AnyFastifyInstance.ts';
/**
 * Test server wrapper that starts a Fastify app on a random port for testing.
 *
 * Use `SSETestServer.start(app)` with your pre-configured Fastify app:
 *
 * ```typescript
 * const app = getApp() // your app factory
 * const server = await SSETestServer.start(app)
 * // server.baseUrl → "http://localhost:xxxxx"
 * // server.app → the Fastify instance
 *
 * const { client } = await SSEHttpClient.connect(server.baseUrl, '/api/events', ...)
 * // ... test ...
 * client.close()
 * await server.close()
 * ```
 */
export declare class SSETestServer {
    /** The Fastify instance */
    readonly app: AnyFastifyInstance;
    /** Base URL for the running server (e.g., "http://localhost:3000") */
    readonly baseUrl: string;
    private constructor();
    /**
     * Start a pre-configured Fastify app on a random port for testing.
     *
     * The app should have routes and plugins already registered —
     * this method only starts the HTTP listener.
     *
     * @param app - A fully configured Fastify instance (routes, plugins, etc. already registered)
     * @returns A running SSETestServer with `baseUrl` and `app`
     *
     * @example
     * ```typescript
     * const app = getApp() // your app factory that creates & configures Fastify
     * const server = await SSETestServer.start(app)
     *
     * const { client } = await SSEHttpClient.connect(
     *   server.baseUrl,
     *   '/api/events',
     *   { awaitServerConnection: { controller } },
     * )
     *
     * // ... test ...
     * client.close()
     * await server.close()
     * ```
     */
    static start(app: AnyFastifyInstance): Promise<SSETestServer>;
    /**
     * Close the server and cleanup resources.
     */
    close(): Promise<void>;
}