code: @Test public void testGetATestStage(){
    Stage s=StageUtils.getATestStage(1,2,"host2");
    String hostname=s.getHosts().get(0);
    List<ExecutionCommandWrapper> wrappers=s.getExecutionCommands(hostname);
    for (  ExecutionCommandWrapper wrapper : wrappers) {
      assertEquals("cluster1",wrapper.getExecutionCommand().getClusterName());
      assertEquals(StageUtils.getActionId(1,2),wrapper.getExecutionCommand().getCommandId());
      assertEquals(hostname,wrapper.getExecutionCommand().getHostname());
    }
  }
  