yihua commented on code in PR #12900:
URL: https://github.com/apache/hudi/pull/12900#discussion_r1978381987


##########
hudi-common/src/test/java/org/apache/hudi/common/testutils/FileCreateUtilsLegacy.java:
##########
@@ -83,11 +81,18 @@ private static void createMetaFile(String basePath, String 
instantTime, String s
   }
 
   private static void createMetaFile(String basePath, String instantTime, 
String suffix) throws IOException {
-    createMetaFile(basePath, instantTime, suffix, getUTF8Bytes(""));
+    createMetaFile(basePath, instantTime, suffix, Option.empty());
   }
 
-  private static void createMetaFile(String basePath, String instantTime, 
String suffix, byte[] content) throws IOException {
-    createMetaFile(getTimelinePath(new 
StoragePath(basePath)).toUri().getPath(), instantTime, 
InProcessTimeGenerator::createNewInstantTime, suffix, content);
+  private static <T> void createMetaFile(String basePath, String instantTime, 
String suffix, Option<T> metadata) throws IOException {
+    createMetaFile(getTimelinePath(new 
StoragePath(basePath)).toUri().getPath(), instantTime,
+        InProcessTimeGenerator::createNewInstantTime, suffix,
+        metadata.isEmpty() ? Option.empty() : 
COMMIT_METADATA_SER_DE.getInstantWriter(metadata.get()));

Review Comment:
   nit: use `metadata.map()`



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