TransactionStoreNoop implements TransactionStore { @Override public boolean insertIntoTransactionRepo(TransactionRepo transactionRepo) { return true; }  @Override boolean insertIntoTransactionRepo(TransactionRepo transactionRepo); @Override String getTransactionId(String messageId);  }
@Test public void testNegativeInsert() { TransactionStoreNoop store = new TransactionStoreNoop(); assert(store.insertIntoTransactionRepo(null)); }