/*
 * 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.streaming.api.datastream;

import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.typeutils.SerializerTestBase;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer;
import org.apache.flink.streaming.api.datastream.CoGroupedStreams.TaggedUnion;
import org.apache.flink.streaming.api.datastream.CoGroupedStreams.UnionSerializer;
import org.apache.flink.testutils.DeeplyEqualsChecker;

/**
 * Serializer tests for {@link UnionSerializer}.
 */
public class UnionSerializerTest extends SerializerTestBase<TaggedUnion<Object, Object>> {

	public UnionSerializerTest() {
		super(new DeeplyEqualsChecker()
			.withCustomCheck(
				(o1, o2) -> o1 instanceof TaggedUnion && o2 instanceof TaggedUnion,
				(o1, o2, checker) -> {
					TaggedUnion union1 = (TaggedUnion) o1;
					TaggedUnion union2 = (TaggedUnion) o2;

					if (union1.isOne() && union2.isOne()) {
						return checker.deepEquals(union1.getOne(), union2.getOne());
					} else if (union1.isTwo() && union2.isTwo()) {
						return checker.deepEquals(union1.getTwo(), union2.getTwo());
					} else {
						return false;
					}
				}
			));
	}

	@Override
	protected TypeSerializer<TaggedUnion<Object, Object>> createSerializer() {
		return new UnionSerializer<>(
			new KryoSerializer<>(Object.class, new ExecutionConfig()),
			new KryoSerializer<>(Object.class, new ExecutionConfig())
		);
	}

	@Override
	protected int getLength() {
		return -1;
	}

	@Override
	@SuppressWarnings("unchecked")
	protected Class<TaggedUnion<Object, Object>> getTypeClass() {
		return (Class<TaggedUnion<Object, Object>>) (Class<?>) TaggedUnion.class;
	}

	@Override
	@SuppressWarnings("unchecked")
	protected TaggedUnion<Object, Object>[] getTestData() {
		return new TaggedUnion[]{
			TaggedUnion.one(1),
			TaggedUnion.two("A"),
			TaggedUnion.one("C")
		};
	}
}