code: @Test public void assertExecuteInTransactionSuccess() throws Exception {
    CuratorFramework client=mock(CuratorFramework.class);
    CuratorTransaction curatorTransaction=mock(CuratorTransaction.class);
    TransactionCheckBuilder transactionCheckBuilder=mock(TransactionCheckBuilder.class);
    CuratorTransactionBridge curatorTransactionBridge=mock(CuratorTransactionBridge.class);
    CuratorTransactionFinal curatorTransactionFinal=mock(CuratorTransactionFinal.class);
    when(regCenter.getRawClient()).thenReturn(client);
    when(client.inTransaction()).thenReturn(curatorTransaction);
    when(curatorTransaction.check()).thenReturn(transactionCheckBuilder);
    when(transactionCheckBuilder.forPath("/")).thenReturn(curatorTransactionBridge);
    when(curatorTransactionBridge.and()).thenReturn(curatorTransactionFinal);
    TransactionCreateBuilder transactionCreateBuilder=mock(TransactionCreateBuilder.class);
    when(curatorTransactionFinal.create()).thenReturn(transactionCreateBuilder);
    when(transactionCreateBuilder.forPath("/test_transaction")).thenReturn(curatorTransactionBridge);
    when(curatorTransactionBridge.and()).thenReturn(curatorTransactionFinal);
    jobNodeStorage.executeInTransaction(new TransactionExecutionCallback(){
      @Override public void execute(    final CuratorTransactionFinal curatorTransactionFinal) throws Exception {
        curatorTransactionFinal.create().forPath("/test_transaction").and();
      }
    }
  );
    verify(regCenter).getRawClient();
    verify(client).inTransaction();
    verify(curatorTransaction).check();
    verify(transactionCheckBuilder).forPath("/");
    verify(curatorTransactionBridge,times(2)).and();
    verify(curatorTransactionFinal).create();
    verify(transactionCreateBuilder).forPath("/test_transaction");
    verify(curatorTransactionFinal).commit();
  }
  