content: /*
   * 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.spark.ml.util;
  
  import java.io.File;
  import java.io.IOException;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  import org.apache.spark.SharedSparkSession;
  import org.apache.spark.util.Utils;
  
  public class JavaDefaultReadWriteSuite extends SharedSparkSession {
    File tempDir = null;
  
    @Override
    public void setUp() throws IOException {
      super.setUp();
      tempDir = Utils.createTempDir(
        System.getProperty("java.io.tmpdir"), "JavaDefaultReadWriteSuite");
    }
  
    @Override
    public void tearDown() {
      super.tearDown();
      Utils.deleteRecursively(tempDir);
    }
  
    @Test
    public void testDefaultReadWrite() throws IOException {
      String uid = "my_params";
      MyParams instance = new MyParams(uid);
      instance.set(instance.intParam(), 2);
      String outputPath = new File(tempDir, uid).getPath();
      instance.save(outputPath);
      try {
        instance.save(outputPath);
        Assert.fail(
          "Write without overwrite enabled should fail if the output directory already exists.");
      } catch (IOException e) {
        // expected
      }
      instance.write().session(spark).overwrite().save(outputPath);
      MyParams newInstance = MyParams.load(outputPath);
      Assert.assertEquals("UID should match.", instance.uid(), newInstance.uid());
      Assert.assertEquals("Params should be preserved.",
        2, newInstance.getOrDefault(newInstance.intParam()));
    }
  }
  