library/src/test/java/com/datatorrent/lib/codec/JavaSerializationStreamCodecTest.java

/*
 * Copyright (c) 2013 DataTorrent, Inc. ALL Rights Reserved.
 *
 * Licensed 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 com.datatorrent.lib.codec;

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

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

import com.datatorrent.common.util.Slice;

/**
 * functional test for {@link com.datatorrent.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);
	}
}