flink-core/src/test/java/org/apache/flink/api/common/serialization/TypeInformationSerializationSchemaTest.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.flink.api.common.serialization;

import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.java.typeutils.TypeExtractor;
import org.apache.flink.core.testutils.CommonTestUtils;

import org.junit.Test;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

/**
 * Tests for {@link TypeInformationSerializationSchema}.
 */
public class TypeInformationSerializationSchemaTest {

	@Test
	public void testDeSerialization() {
		try {
			TypeInformation<MyPOJO> info = TypeExtractor.getForClass(MyPOJO.class);

			TypeInformationSerializationSchema<MyPOJO> schema =
					new TypeInformationSerializationSchema<MyPOJO>(info, new ExecutionConfig());

			MyPOJO[] types = {
					new MyPOJO(72, new Date(763784523L), new Date(88234L)),
					new MyPOJO(-1, new Date(11111111111111L)),
					new MyPOJO(42),
					new MyPOJO(17, new Date(222763784523L))
			};

			for (MyPOJO val : types) {
				byte[] serialized = schema.serialize(val);
				MyPOJO deser = schema.deserialize(serialized);
				assertEquals(val, deser);
			}
		}
		catch (Exception e) {
			e.printStackTrace();
			fail(e.getMessage());
		}
	}

	@Test
	public void testSerializability() {
		try {
			TypeInformation<MyPOJO> info = TypeExtractor.getForClass(MyPOJO.class);
			TypeInformationSerializationSchema<MyPOJO> schema =
					new TypeInformationSerializationSchema<MyPOJO>(info, new ExecutionConfig());

			// this needs to succeed
			CommonTestUtils.createCopySerializable(schema);
		}
		catch (Exception e) {
			e.printStackTrace();
			fail(e.getMessage());
		}
	}

	// ------------------------------------------------------------------------
	//  Test data types
	// ------------------------------------------------------------------------

	private static class MyPOJO {

		public int aField;
		public List<Date> aList;

		public MyPOJO() {}

		public MyPOJO(int iVal, Date... dates) {
			this.aField = iVal;
			this.aList = new ArrayList<>(Arrays.asList(dates));
		}

		@Override
		public int hashCode() {
			return aField;
		}

		@Override
		public boolean equals(Object obj) {
			if (obj instanceof MyPOJO) {
				MyPOJO that = (MyPOJO) obj;
				return this.aField == that.aField && (this.aList == null ?
						that.aList == null :
						that.aList != null && this.aList.equals(that.aList));
			}
			return super.equals(obj);
		}

		@Override
		public String toString() {
			return "MyPOJO " + aField + " " + aList;
		}
	}
}