/// <reference types="jest" />
import type { QueryClientConfig } from '@tanstack/query-core';
import { QueryClient } from '@tanstack/query-core';
import type { Persister } from '@tanstack/query-persist-client-core';
export declare function createQueryClient(config?: QueryClientConfig): QueryClient;
export declare const mockLogger: {
    log: jest.Mock<any, any>;
    warn: jest.Mock<any, any>;
    error: jest.Mock<any, any>;
};
export declare function sleep(timeout: number): Promise<void>;
export declare const createMockPersister: () => Persister;
export declare const createSpyablePersister: () => Persister;
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