[MINOR][SQL] Combine the same codes in test cases

## What changes were proposed in this pull request?

In the DDLSuit, there are four test cases have the same codes , writing a function can combine the same code.

## How was this patch tested?

existing tests.

Closes #23194 from CarolinePeng/Update_temp.

Authored-by: 彭灿00244106 <00244106@zte.intra>
Signed-off-by: Takeshi Yamamuro <yamamuro@apache.org>

sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLSuite.scala

@@ -377,41 +377,41 @@ abstract class DDLSuite extends QueryTest with SQLTestUtils {
     }
   }
 
-  test("CTAS a managed table with the existing empty directory") {
-    val tableLoc = new File(spark.sessionState.catalog.defaultTablePath(TableIdentifier("tab1")))
+  private def withEmptyDirInTablePath(dirName: String)(f : File => Unit): Unit = {
+    val tableLoc =
+      new File(spark.sessionState.catalog.defaultTablePath(TableIdentifier(dirName)))
     try {
       tableLoc.mkdir()
-      withTable("tab1") {
-        sql(s"CREATE TABLE tab1 USING ${dataSource} AS SELECT 1, 'a'")
-        checkAnswer(spark.table("tab1"), Row(1, "a"))
-      }
+      f(tableLoc)
     } finally {
       waitForTasksToFinish()
       Utils.deleteRecursively(tableLoc)
     }
   }
 
+
+  test("CTAS a managed table with the existing empty directory") {
+    withEmptyDirInTablePath("tab1") { tableLoc =>
+      withTable("tab1") {
+        sql(s"CREATE TABLE tab1 USING ${dataSource} AS SELECT 1, 'a'")
+        checkAnswer(spark.table("tab1"), Row(1, "a"))
+      }
+    }
+  }
+
   test("create a managed table with the existing empty directory") {
-    val tableLoc = new File(spark.sessionState.catalog.defaultTablePath(TableIdentifier("tab1")))
-    try {
-      tableLoc.mkdir()
+    withEmptyDirInTablePath("tab1") { tableLoc =>
       withTable("tab1") {
         sql(s"CREATE TABLE tab1 (col1 int, col2 string) USING ${dataSource}")
         sql("INSERT INTO tab1 VALUES (1, 'a')")
         checkAnswer(spark.table("tab1"), Row(1, "a"))
       }
-    } finally {
-      waitForTasksToFinish()
-      Utils.deleteRecursively(tableLoc)
     }
   }
 
   test("create a managed table with the existing non-empty directory") {
     withTable("tab1") {
-      val tableLoc = new File(spark.sessionState.catalog.defaultTablePath(TableIdentifier("tab1")))
-      try {
-        // create an empty hidden file
-        tableLoc.mkdir()
+      withEmptyDirInTablePath("tab1") { tableLoc =>
         val hiddenGarbageFile = new File(tableLoc.getCanonicalPath, ".garbage")
         hiddenGarbageFile.createNewFile()
         val exMsg = "Can not create the managed table('`tab1`'). The associated location"
@@ -439,28 +439,20 @@ abstract class DDLSuite extends QueryTest with SQLTestUtils {
           }.getMessage
           assert(ex.contains(exMsgWithDefaultDB))
         }
-      } finally {
-        waitForTasksToFinish()
-        Utils.deleteRecursively(tableLoc)
       }
     }
   }
 
   test("rename a managed table with existing empty directory") {
-    val tableLoc = new File(spark.sessionState.catalog.defaultTablePath(TableIdentifier("tab2")))
-    try {
+    withEmptyDirInTablePath("tab2") { tableLoc =>
       withTable("tab1") {
         sql(s"CREATE TABLE tab1 USING $dataSource AS SELECT 1, 'a'")
-        tableLoc.mkdir()
         val ex = intercept[AnalysisException] {
           sql("ALTER TABLE tab1 RENAME TO tab2")
         }.getMessage
         val expectedMsg = "Can not rename the managed table('`tab1`'). The associated location"
         assert(ex.contains(expectedMsg))
       }
-    } finally {
-      waitForTasksToFinish()
-      Utils.deleteRecursively(tableLoc)
     }
   }