/**
 * SMI-3416: BackgroundSyncService Tests
 *
 * Tests for session-based automatic sync service:
 * - Start/stop lifecycle
 * - Sync-on-start behavior
 * - Periodic check and sync triggering
 * - Concurrent sync prevention
 * - Manual sync
 * - Error handling and callbacks
 */
import type { SyncEngine, SyncResult } from '../../src/sync/SyncEngine.js';
import type { SyncConfigRepository } from '../../src/repositories/SyncConfigRepository.js';
export declare function createMockSyncResult(overrides?: Partial<SyncResult>): SyncResult;
export declare function createMockSyncEngine(result?: SyncResult): SyncEngine;
export declare function createMockConfigRepo(overrides?: {
    enabled?: boolean;
    lastSyncAt?: string | null;
    isSyncDue?: boolean;
}): SyncConfigRepository;
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