export declare const fakeDate: () => void;
export declare const restoreDate: () => void;
export declare const setTimeShift: (shift: number) => number;
export declare const getCurrentTimeShift: () => number;
export declare class FakeDate extends Date {
    static now(): number;
    constructor();
    constructor(value: number | string);
    constructor(year: number, month: number, date?: number, hours?: number, minutes?: number, seconds?: number, ms?: number);
}