import { FetchBackend, HttpClientBase, kBackend } from '@opra/client';
import { IncomingMessage, Server, ServerResponse } from 'http';
import { ApiExpect } from './api-expect/api-expect.js';
import { TestBackend } from './test-backend.js';
declare type RequestListener = (req: IncomingMessage, res: ServerResponse) => void;
export declare const kContext: unique symbol;
export type ResponseExt = {
    expect: ApiExpect;
};
export declare namespace OpraTestClient {
    interface Options extends FetchBackend.Options {
        basePath?: string;
    }
}
/**
 * Test specific implementation of {@link HttpClientBase} for API testing.
 *
 * @class OpraTestClient
 */
export declare class OpraTestClient extends HttpClientBase<FetchBackend.RequestOptions, ResponseExt> {
    [kBackend]: TestBackend;
    /**
     * Creates a new instance of OpraTestClient.
     *
     * @param app The server or request listener to test.
     * @param options Configuration options.
     */
    constructor(app: Server | RequestListener, options?: OpraTestClient.Options);
}
export {};