/// <reference types="node" />
import { ServerOptions as HttpsServerOptions } from 'https';
export declare type ConfigRetval<T extends object> = T & {
    host: string;
    port: number;
} & HttpsServerOptions;
/**
 * Create an HTTP-server configuration that works well in test environments.
 *  - Ask the operating system to assign a free (ephemeral) port.
 *  - Use IPv4 localhost `127.0.0.1` to avoid known IPv6 issues in Docker-based
 *    environments like Travis-CI.
 *  - Provide default TLS key & cert when `protocol` is set to `https`.
 *
 * @param customConfig - Additional configuration options to apply.
 */
export declare function givenHttpServerConfig<T extends object>(customConfig?: T & {
    protocol?: string;
}): ConfigRetval<T>;