import type { Mail } from "./type";
import type { MailServer } from "./mailserver";
interface Next {
    filter: (Mail: any) => boolean;
    resolve: (Mail: any) => any;
    reject: (Error: any) => any;
    consume: boolean;
    timeout?: NodeJS.Timeout | undefined;
}
export declare class MailBuffer {
    mails: Mail[];
    nexts: Next[];
    defaultTimeout: number;
    close: () => any;
    _receive: (Mail: any) => any;
    constructor(mailServer: MailServer, subject: String, defaultTimeout: number);
    find(filter: (Mail: any) => boolean, consume: boolean): Mail | undefined;
    next(filter: (Mail: any) => boolean, consume?: boolean): Promise<Mail>;
    expect(filter: (Mail: any) => boolean, consume?: boolean, timeout?: number): Promise<Mail>;
}
export {};