diff --git a/src/test/java/component/LpPacketFragmentIdTest.java b/src/test/java/component/LpPacketFragmentIdTest.java
new file mode 100644
index 0000000..e188643
--- /dev/null
+++ b/src/test/java/component/LpPacketFragmentIdTest.java
@@ -0,0 +1,37 @@
+package component;
+
+import encoding.*;
+import org.junit.Test;
+
+import java.util.Arrays;
+
+/*
+ * @Author: Wang Feng
+ * @Description:
+ * @Version: 1.0.0
+ * @Date: 14:03 2021/4/8
+ * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
+ */
+public class LpPacketFragmentIdTest {
+    @Test
+    public void testLpPacketFragmentIdEncoderAndDecode() throws EncoderException, ComponentException, BlockException {
+        LpPacketFragmentId lpPacketFragmentId=new LpPacketFragmentId(Long.MAX_VALUE);
+        System.out.println("value: "+lpPacketFragmentId.getId());
+        System.out.println("ini: "+lpPacketFragmentId.isInitial());
+
+        Encoder encoder = new Encoder();
+        encoder.encoderReset(new SizeT(Encoder.MaxPacketSize), new SizeT(0));
+        System.out.println("encode res: "+lpPacketFragmentId.wireEncode(encoder));
+        byte[] buf=encoder.getBuffer();
+        System.out.println("buf: "+ Arrays.toString(buf));
+
+        Block block=new Block(buf,false);
+        LpPacketFragmentId newId=new LpPacketFragmentId();
+        System.out.println("decode res: "+newId.wireDecode(block));
+        System.out.println("new value: "+newId.getId());
+        System.out.println("new ini: "+newId.isInitial());
+        encoder.encoderReset(new SizeT(Encoder.MaxPacketSize), new SizeT(0));
+        newId.wireEncode(encoder);
+        System.out.println("new buf: "+Arrays.toString(encoder.getBuffer()));
+    }
+}