library/src/test/java/org/apache/apex/malhar/lib/codec/JavaSerializationStreamCodecTest.java

/**
 * 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.apex.malhar.lib.codec;

import java.io.IOException;
import java.io.Serializable;

import org.junit.Assert;
import org.junit.Test;

import com.datatorrent.netlet.util.Slice;

/**
 * functional test for {@link org.apache.apex.malhar.lib.util.JavaSerializationStreamCodec}.
 */
public class JavaSerializationStreamCodecTest
{
  static class TestClass implements Serializable
  {
    private static final long serialVersionUID = 201301081743L;
    final String s;
    final int i;

    TestClass(String s, int i)
    {
      this.s = s;
      this.i = i;
    }

    TestClass()
    {
      s = "default!";
      i = Integer.MAX_VALUE;
    }

    @Override
    public int hashCode()
    {
      int hash = 7;
      hash = 97 * hash + (this.s != null ? this.s.hashCode() : 0);
      hash = 97 * hash + this.i;
      return hash;
    }

    @Override
    public boolean equals(Object obj)
    {
      if (obj == null) {
        return false;
      }
      if (getClass() != obj.getClass()) {
        return false;
      }
      final TestClass other = (TestClass)obj;
      if ((this.s == null) ? (other.s != null) : !this.s.equals(other.s)) {
        return false;
      }
      if (this.i != other.i) {
        return false;
      }
      return true;
    }

  }

  @Test
  public void testSomeMethod() throws IOException
  {
    JavaSerializationStreamCodec<Serializable> coder = new JavaSerializationStreamCodec<Serializable>();
    JavaSerializationStreamCodec<Serializable> decoder = new JavaSerializationStreamCodec<Serializable>();

    TestClass tc = new TestClass("hello!", 42);

    Slice dsp1 = coder.toByteArray(tc);
    Slice dsp2 = coder.toByteArray(tc);
    Assert.assertEquals(dsp1, dsp2);

    Object tcObject1 = decoder.fromByteArray(dsp1);
    assert (tc.equals(tcObject1));

    Object tcObject2 = decoder.fromByteArray(dsp2);
    assert (tc.equals(tcObject2));

    dsp1 = coder.toByteArray(tc);
    dsp2 = coder.toByteArray(tc);
    Assert.assertEquals(dsp1, dsp2);
  }

  public static class TestTuple implements Serializable
  {
    private static final long serialVersionUID = 201301081744L;
    final Integer finalField;

    @SuppressWarnings("unused")
    private TestTuple()
    {
      finalField = null;
    }

    public TestTuple(Integer i)
    {
      this.finalField = i;
    }

  }

  @Test
  public void testFinalFieldSerialization() throws Exception
  {
    TestTuple t1 = new TestTuple(5);
    JavaSerializationStreamCodec<Serializable> c = new JavaSerializationStreamCodec<Serializable>();
    Slice dsp = c.toByteArray(t1);
    TestTuple t2 = (TestTuple)c.fromByteArray(dsp);
    Assert.assertEquals("", t1.finalField, t2.finalField);
  }
}