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.beam.sdk.extensions.kryo;
  
  import static org.junit.Assert.assertSame;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import org.junit.Test;
  
  /** A set of unit {@link KryoState} tests. */
  public class KryoStateTest {
  
    @Test
    public void testSameKryoAfterDeserialization() throws IOException, ClassNotFoundException {
      final KryoCoder<?> coder = KryoCoder.of(k -> k.register(TestClass.class));
      final KryoState firstKryo = KryoState.get(coder);
  
      final ByteArrayOutputStream outStr = new ByteArrayOutputStream();
      final ObjectOutputStream oss = new ObjectOutputStream(outStr);
      oss.writeObject(coder);
      oss.flush();
      oss.close();
  
      final ObjectInputStream ois =
          new ObjectInputStream(new ByteArrayInputStream(outStr.toByteArray()));
      @SuppressWarnings("unchecked")
      final KryoCoder<?> deserializedCoder = (KryoCoder) ois.readObject();
      final KryoState secondKryo = KryoState.get(deserializedCoder);
      assertSame(firstKryo, secondKryo);
    }
  
    private static class TestClass {}
  }
  