viirya commented on a change in pull request #32582:
URL: https://github.com/apache/spark/pull/32582#discussion_r645685787



##########
File path: 
sql/core/src/test/scala/org/apache/spark/sql/execution/streaming/state/RocksDBSuite.scala
##########
@@ -54,4 +130,30 @@ class RocksDBSuite extends SparkFunSuite {
       
"""{"sstFiles":[{"localFileName":"00001.sst","dfsSstFileName":"00001-uuid.sst","sizeBytes":12345678901234}],"logFiles":[{"localFileName":"00001.log","dfsLogFileName":"00001-uuid.log","sizeBytes":12345678901234}],"numKeys":12345678901234}""")
     // scalastyle:on line.size.limit
   }
+
+  def generateFiles(dir: String, fileToLengths: Seq[(String, Int)]): Unit = {
+    fileToLengths.foreach { case (fileName, length) =>
+      val file = new File(dir, fileName)
+      FileUtils.write(file, "a" * length)
+    }
+  }
+
+  def saveCheckpointFiles(
+      fileManager: RocksDBFileManager,
+      fileToLengths: Seq[(String, Int)],
+      version: Int,
+      numKeys: Int): Unit = {
+    val checkpointDir = Utils.createTempDir().getAbsolutePath // local dir to 
create checkpoints

Review comment:
       Is it `localTempDir`?
   
   ```scala
   class RocksDBFileManager(
       dfsRootDir: String,
       localTempDir: File,
       hadoopConf: Configuration,
       loggingId: String = "")
   ```




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