Optimized testReadByte of FastJson2SerializationTest

Author: zrlw

dubbo-serialization/dubbo-serialization-fastjson2/src/test/java/org/apache/dubbo/common/serialize/fastjson2/FastJson2SerializationTest.java

@@ -27,6 +27,8 @@
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.LinkedList;
@@ -204,7 +206,7 @@ void testReadEvent() throws IOException, ClassNotFoundException {
     }
 
     @Test
-    void testReadByte() throws IOException {
+    void testReadByte() throws IOException, ParseException {
         FrameworkModel frameworkModel = new FrameworkModel();
         Serialization serialization =
                 frameworkModel.getExtensionLoader(Serialization.class).getExtension("fastjson2");
@@ -227,7 +229,9 @@ void testReadByte() throws IOException {
         {
             ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
             ObjectOutput objectOutput = serialization.serialize(url, outputStream);
-            objectOutput.writeObject(new Date());
+            // the milliseconds of date should not be zero, otherwise the output could be read as byte.
+            Date date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").parse("2025-04-01 12:47:10.001");
+            objectOutput.writeObject(date);
             objectOutput.flushBuffer();
 
             byte[] bytes = outputStream.toByteArray();