import type { Mocker } from '@abstractest/types';
export declare class LocalStorage {
    __data: Map<string, string>;
    constructor(mocker?: Mocker, data?: Map<string, string>);
    getItem(key: string): string | null | undefined;
    setItem(key: string, value: string): void;
    removeItem(key: string): void;
    clear(): void;
    toString(): string;
    key(idx: number): string | null;
    get length(): number;
}