/// <summary>
/// 准备流程，然后流转到活动D
/// </summary>
/// <returns></returns>
public static IWfActivity PrepareAndMoveToSpecialActivity()
{
IWfProcessDescriptor processDesp = ReturnExecutorTestHelper.PrepareSpecialReturnProcessDesp();
IWfProcess process = ReturnExecutorTestHelper.StartSpecialReturnProcess(processDesp);
WfProcessTestCommon.MoveToNextDefaultActivity(process); //To B
WfProcessTestCommon.MoveToNextDefaultActivity(process); //To C
WfProcessTestCommon.MoveToNextDefaultActivity(process); //To D
return(process.CurrentActivity);
}