// TestSyncMetadata validates metadata synchronization mechanism in AlluxioEngine.
// 
// Core test scenarios:
// 1. Standard sync flow with populated UfsTotal (hbase dataset)
// 2. Error handling when UfsTotal is empty without restore path (spark dataset)
// 3. Metadata restoration with DataRestoreLocation (hadoop dataset)
//
// Implementation features:
// • Simulates Kubernetes API via fake client
// • Constructs multi-state datasets for scenario coverage
// • Mocks metadata queries via QueryMetaDataInfoIntoFile hook
// • Verifies error propagation in SyncMetadata workflow
// • Ensures hook cleanup through wrappedUnhook