import { vi } from 'vitest';
/**
 * Creates a mock function with type safety
 */
export declare function createMockFn<T extends (...args: any[]) => any>(): ReturnType<typeof vi.fn<T>>;
/**
 * Waits for a specified number of milliseconds
 * Useful for testing async operations
 */
export declare function wait(ms: number): Promise<void>;
/**
 * Creates a deferred promise that can be resolved/rejected externally
 */
export declare function createDeferred<T>(): {
    promise: Promise<T>;
    resolve: (value: T) => void;
    reject: (error: unknown) => void;
};
/**
 * Type-safe mock creator for complex objects.
 * Returns a Partial<T>; callers are responsible for providing required properties if needed.
 */
export declare function createMock<T>(overrides?: Partial<T>): Partial<T>;
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