### Question:
ShardDataSourceCreateHelper { public Long getShardId() { return shardId; } ShardDataSourceCreateHelper(DatabaseManager databaseManager);  ShardDataSourceCreateHelper(DatabaseManager databaseManager, Long shardId); Long getShardId(); String getShardName(); TransactionalDataSource getShardDb(); ShardDataSourceCreateHelper createUninitializedDataSource(); String checkGenerateShardName(); static final int MAX_CACHE_SIZE; static final int MAX_CONNECTIONS; static final int MAX_MEMORY_ROWS; }### Answer:
@Test void getShardId() { createHelper = new ShardDataSourceCreateHelper(extension.getDatabaseManager(), null); createHelper.createUninitializedDataSource(); long shardId = createHelper.getShardId(); assertEquals(3, shardId); }