LuciferYang commented on code in PR #49825:
URL: https://github.com/apache/spark/pull/49825#discussion_r1944189956


##########
common/network-shuffle/src/test/java/org/apache/spark/network/shuffle/ShuffleTransportContextSuite.java:
##########
@@ -114,16 +115,17 @@ public void testDecodeOfFinalizeShuffleMessage() throws 
Exception {
     FinalizeShuffleMerge finalizeRequest = new FinalizeShuffleMerge("app0", 1, 
2, 3);
     RpcRequest rpcRequest = new RpcRequest(1, new 
NioManagedBuffer(finalizeRequest.toByteBuffer()));
     ByteBuf messageBuf = getDecodableMessageBuf(rpcRequest);
-    ShuffleTransportContext shuffleTransportContext = 
createShuffleTransportContext(true);
-    ShuffleTransportContext.ShuffleMessageDecoder decoder =
+    try (ShuffleTransportContext shuffleTransportContext = 
createShuffleTransportContext(true)) {
+      ShuffleTransportContext.ShuffleMessageDecoder decoder =
         (ShuffleTransportContext.ShuffleMessageDecoder) 
shuffleTransportContext.getDecoder();
-    List<Object> out = Lists.newArrayList();
-    decoder.decode(mock(ChannelHandlerContext.class), messageBuf, out);
+      List<Object> out = Lists.newArrayList();
+      decoder.decode(mock(ChannelHandlerContext.class), messageBuf, out);
 
-    Assertions.assertEquals(1, out.size());
-    Assertions.assertTrue(out.get(0) instanceof 
ShuffleTransportContext.RpcRequestInternal);
-    Assertions.assertEquals(BlockTransferMessage.Type.FINALIZE_SHUFFLE_MERGE,
+      Assertions.assertEquals(1, out.size());
+      
Assertions.assertInstanceOf(ShuffleTransportContext.RpcRequestInternal.class, 
out.get(0));

Review Comment:
   can use `assertInstanceOf` in JUnit 5



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