/*
 * 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.functions.windowing.delta.extractor;

import static org.junit.Assert.*;

import org.apache.flink.api.java.tuple.Tuple2;
import org.junit.Before;
import org.junit.Test;

public class ConcatenatedExtractTest {

	private String[] testStringArray1 = { "1", "2", "3" };
	private int[] testIntArray1 = { 1, 2, 3 };
	private String[] testStringArray2 = { "4", "5", "6" };
	private int[] testIntArray2 = { 4, 5, 6 };
	private String[] testStringArray3 = { "7", "8", "9" };
	private int[] testIntArray3 = { 7, 8, 9 };
	private Tuple2<String[], int[]>[] testTuple2Array;
	private Tuple2<String[], int[]> testTuple2;
	private Tuple2<Tuple2<String[], int[]>, Tuple2<String[], int[]>[]> testData;

	@SuppressWarnings("unchecked")
	@Before
	public void setupData() {
		testTuple2Array = new Tuple2[2];
		testTuple2Array[0] = new Tuple2<String[], int[]>(testStringArray1, testIntArray2);
		testTuple2Array[1] = new Tuple2<String[], int[]>(testStringArray2, testIntArray1);

		testTuple2 = new Tuple2<String[], int[]>(testStringArray3, testIntArray3);

		testData = new Tuple2<Tuple2<String[], int[]>, Tuple2<String[], int[]>[]>(testTuple2,
				testTuple2Array);
	}

	@SuppressWarnings({ "rawtypes", "unchecked" })
	@Test
	public void test1() {
		Extractor ext = new ConcatenatedExtract(new FieldFromTuple(0), new FieldFromTuple(1))
				.add(new FieldsFromArray(Integer.class, 2, 1, 0));
		int[] expected = { testIntArray3[2], testIntArray3[1], testIntArray3[0] };
		assertEquals(new Integer(expected[0]), ((Integer[]) ext.extract(testData))[0]);
		assertEquals(new Integer(expected[1]), ((Integer[]) ext.extract(testData))[1]);
		assertEquals(new Integer(expected[2]), ((Integer[]) ext.extract(testData))[2]);
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	@Test
	public void test2() {
		Extractor ext = new ConcatenatedExtract(new FieldFromTuple(1), // Tuple2<String[],int[]>[]
				new FieldsFromArray(Tuple2.class, 1)) // Tuple2<String[],int[]>[]
				.add(new FieldFromArray(0)) // Tuple2<String[],int[]>
				.add(new ArrayFromTuple(0)) // Object[] (Containing String[])
				.add(new FieldFromArray(0)) // String[]
				.add(new FieldFromArray(1)); // String

		String expected2 = testStringArray2[1];
		assertEquals(expected2, ext.extract(testData));

	}

}