import { FakeMailer } from '@adonisjs/mail';
export declare const generatePassword: () => string;
export declare const firstMailData: (fakeMailer: FakeMailer, mailClass: any) => {
    text: string;
} | undefined;
export declare const serializeDate: (date: Date | string, atMidnight?: boolean) => string;
export declare const addDays: (date: Date, days: number) => Date;
export declare const sleep: (ms: number) => Promise<unknown>;
export declare const waitFor: <T>(f: () => Promise<T | undefined>, delay?: number, interval?: number) => Promise<T | undefined>;
