add ut for spark engine save result

externals/kyuubi-spark-sql-engine/src/test/scala/org/apache/kyuubi/engine/spark/operation/SparkSaveFileSuite.scala

@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.kyuubi.engine.spark.operation
+
+import org.apache.hadoop.fs.Path
+
+import org.apache.kyuubi.config.KyuubiConf.{OPERATION_RESULT_SAVE_TO_FILE, OPERATION_RESULT_SAVE_TO_FILE_DIR, OPERATION_RESULT_SAVE_TO_FILE_MIN_ROWS, OPERATION_RESULT_SAVE_TO_FILE_MINSIZE}
+import org.apache.kyuubi.engine.spark.WithSparkSQLEngine
+import org.apache.kyuubi.engine.spark.session.SparkSQLSessionManager
+import org.apache.kyuubi.jdbc.hive.KyuubiStatement
+import org.apache.kyuubi.operation.HiveJDBCTestHelper
+
+class SparkSaveFileSuite extends WithSparkSQLEngine with HiveJDBCTestHelper {
+
+  override def withKyuubiConf: Map[String, String] = {
+    Map(
+      OPERATION_RESULT_SAVE_TO_FILE.key -> "true",
+      OPERATION_RESULT_SAVE_TO_FILE_MINSIZE.key -> "100",
+      OPERATION_RESULT_SAVE_TO_FILE_MIN_ROWS.key -> "100")
+  }
+
+  override protected def jdbcUrl: String =
+    s"jdbc:hive2://${engine.frontendServices.head.connectionUrl}/;#spark.ui.enabled=false"
+
+  private def sessionHandle: String = {
+    engine.backendService.sessionManager.allSessions().head.handle.identifier.toString
+  }
+
+  private def getOperationHandle(): String = {
+    val operationHandle =
+      engine.backendService.sessionManager.operationManager.allOperations()
+        .head.getHandle.identifier.toString
+    s"$sessionHandle/$operationHandle"
+  }
+
+  test("test save file effect") {
+    var enginePath: Path = new Path(kyuubiConf.get(OPERATION_RESULT_SAVE_TO_FILE_DIR))
+    val sparkFileSystem = enginePath.getFileSystem(spark.sparkContext.hadoopConfiguration)
+    var sessionPath: Path = enginePath
+    withJdbcStatement("table1") { statement =>
+      enginePath =
+        engine.backendService.sessionManager.asInstanceOf[SparkSQLSessionManager]
+          .getEngineResultSavePath()
+      sessionPath = new Path(s"$enginePath/$sessionHandle")
+      statement.asInstanceOf[KyuubiStatement].getConnection.getClientInfo
+      // test save result skip command
+      statement.executeQuery("create table table1 as select UUID() from range(1000)")
+      var resultPath = new Path(s"$enginePath/$getOperationHandle")
+      assert(!sparkFileSystem.exists(resultPath))
+      statement.executeQuery("show tables")
+      resultPath = new Path(s"$enginePath/$getOperationHandle")
+
+      assert(!sparkFileSystem.exists(resultPath))
+      val res = statement.executeQuery("select * from table1")
+      resultPath = new Path(s"$enginePath/$getOperationHandle")
+      assert(sparkFileSystem.exists(resultPath))
+      res.close()
+      assert(!sparkFileSystem.exists(resultPath))
+
+      // test rows number less than minRows
+      statement.executeQuery("select * from table1 limit 10")
+      resultPath = new Path(s"$enginePath/$getOperationHandle")
+      assert(!sparkFileSystem.exists(resultPath))
+    }
+    // delete session path after session close
+    assert(!sparkFileSystem.exists(sessionPath))
+  }
+}