给这个方法添加单元测试： public List<MessageDetails> processTrade(CisTStpTradeData tradeData) throws CisTStpException { List<T> viewList = getTradeData(tradeData.getTradeId()); log.info("Size of Object fetched for CIS Trade id {} is {} ", tradeData.getTradeId(), viewList.size()); if(!validateRequest(viewList)){ log.info("Not a valid data to process...."); return null; } Map<String, List<T>> viewAsMap = getViewAsMap(viewList); List<MessageDetails> msgDetailsListAllLegs = new ArrayList<>(); /Process REPO Leg first/ CisRefScbmlEvents reUseRefEvent = null; if(viewAsMap != null && viewAsMap.size() > 0 && viewAsMap.containsKey(TradeLegs.REPO_LEG.getValue())){ log.info("REPO Leg identified in the package"); Map<String, List<T>> repoViewAsMap = viewAsMap.entrySet().stream().filter(p -> p.getKey().equals(TradeLegs.REPO_LEG.getValue())).collect(Collectors.toMap(x -> x.getKey(), x -> x.getValue())); processAllMsgDetail(repoViewAsMap, tradeData, msgDetailsListAllLegs, null); log.info("Event will be reused for other LEGS in package"); if(msgDetailsListAllLegs != null && msgDetailsListAllLegs.size() > 0 && msgDetailsListAllLegs.get(0).getEventDetails() != null){ reUseRefEvent = msgDetailsListAllLegs.get(0).getEventDetails().getRefEvent(); log.info("REPO Event to be reused for other legs is : {} ", reUseRefEvent); } log.info("REPO Leg processed and removed from Map"); viewAsMap.remove(TradeLegs.REPO_LEG.getValue()); } /*Process SCF leg */ if(viewAsMap != null && viewAsMap.size() > 0 && viewAsMap.containsKey(TradeLegs.SCF_LEG.getValue())){ log.info("SCF Leg identified in the package"); Map<String, List<T>> repoViewAsMap = viewAsMap.entrySet().stream().filter(p -> p.getKey().equals(TradeLegs.SCF_LEG.getValue())).collect(Collectors.toMap(x -> x.getKey(), x -> x.getValue())); processAllMsgDetail(repoViewAsMap, tradeData, msgDetailsListAllLegs, null); log.info("SCF Leg processed and removed from Map"); viewAsMap.remove(TradeLegs.SCF_LEG.getValue()); } /Process NON REPO and other CIS and SIP Legs After it. This is done to reuse the Event identified for REPO above for same package/ processAllMsgDetail(viewAsMap, tradeData, msgDetailsListAllLegs, reUseRefEvent); return msgDetailsListAllLegs; }

Here is an example of a JUnit test for the given method:

import org.junit.Test;
import static org.junit.Assert.*;

public class TradeProcessorTest {

   @Test
   public void testProcessTrade() throws CisTStpException {
      // Create a mock CisTStpTradeData object
      CisTStpTradeData tradeData = new CisTStpTradeData();
      tradeData.setTradeId("123");

      // Create a mock list of trade data objects
      List<T> viewList = new ArrayList<T>();
      viewList.add(new TradeDataObject());

      // Create a mock TradeProcessor object
      TradeProcessor tradeProcessor = new TradeProcessor();

      // Call the method under test
      List<MessageDetails> result = tradeProcessor.processTrade(tradeData);

      // Verify that the result is not null
      assertNotNull(result);

      // Verify that the result is of the expected size
      assertEquals(1, result.size());
   }
}

This test creates a mock `CisTStpTradeData` object and a mock list of trade data objects, and then calls the `processTrade` method on a mock `TradeProcessor` object. It then verifies that the result is not null and is of the expected size.

You can add more test cases to cover different scenarios and edge cases.