import type { MockKVNamespace, KVEntry, KVMap } from "./types/MockKVNamespace";
/**
 * Creates an in-memory mock implementation of the Cloudflare KVNamespace interface for use in tests.
 *
 * Features:
 * - get / put / delete operations
 * - TTL and absolute expiration support
 * - Typed JSON parsing (via `{ type: 'json' }`)
 * - Key listing with limit
 * - .dump() for test inspection
 *
 * All expiration values are normalized into milliseconds using the `expiresAt` field.
 *
 * @example
 * ```ts
 * const kv = mockKVNamespace();
 * await kv.put('foo', 'bar', { expirationTtl: 60 });
 * const val = await kv.get('foo'); // 'bar'
 * ```
 *
 * @param data - Optional initial KV data to populate the store.
 * @returns A mock KVNamespace instance with Cloudflare-like API.
 */
export declare const mockKVNamespace: (data?: KVMap) => MockKVNamespace & {
    dump: () => Record<string, KVEntry>;
    list: (_opts?: {
        limit?: number;
    }) => Promise<{
        keys: {
            name: string;
        }[];
        list_complete: boolean;
    }>;
    expireKeyNow: (_key: string) => void;
};