import { Async, KV } from './types';
/**
 * A mock implementation of an async key-value store that keeps all data in a map
 * in memory.
 */
export declare class MockAsync implements Async {
    readonly store: Map<string, unknown>;
    get<V>(key: string): Promise<V | null>;
    set<V>(key: string, value: V): Promise<void>;
    delete(key: string): Promise<void>;
    length(): Promise<number>;
    clear(): Promise<void>;
}
/**
 * A mock implementation of a sync key-value store that keeps all data in a map
 * in memory.
 */
export declare class MockSync implements KV {
    readonly store: Map<string, unknown>;
    get<V>(key: string): V | null;
    set<V>(key: string, value: V): void;
    delete(key: string): void;
}
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