/***********************************************************************************************************************
 * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
 *
 * 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 eu.stratosphere.pact.runtime.task;

import junit.framework.Assert;

import org.junit.Test;

import eu.stratosphere.api.common.functions.GenericCrosser;
import eu.stratosphere.pact.runtime.task.CrossTaskTest.MockCrossStub;
import eu.stratosphere.pact.runtime.test.util.DriverTestBase;
import eu.stratosphere.pact.runtime.test.util.UniformRecordGenerator;
import eu.stratosphere.types.Record;


public class CrossTaskExternalITCase extends DriverTestBase<GenericCrosser<Record, Record, Record>>
{
	private static final long CROSS_MEM = 1024 * 1024;
	
	private final CountingOutputCollector output = new CountingOutputCollector();

	public CrossTaskExternalITCase() {
		super(CROSS_MEM, 0);
	}
	
	@Test
	public void testExternalBlockCrossTask() {

		int keyCnt1 = 2;
		int valCnt1 = 1;
		
		// 43690 fit into memory, 43691 do not!
		int keyCnt2 = 43700;
		int valCnt2 = 1;
		
		final int expCnt = keyCnt1*valCnt1*keyCnt2*valCnt2;
		
		setOutput(this.output);
		
		addInput(new UniformRecordGenerator(keyCnt1, valCnt1, false));
		addInput(new UniformRecordGenerator(keyCnt2, valCnt2, false));
				
		getTaskConfig().setDriverStrategy(DriverStrategy.NESTEDLOOP_BLOCKED_OUTER_FIRST);
		getTaskConfig().setMemoryDriver(CROSS_MEM);
		
		final CrossDriver<Record, Record, Record> testTask = new CrossDriver<Record, Record, Record>();
		
		try {
			testDriver(testTask, MockCrossStub.class);
		} catch (Exception e) {
			e.printStackTrace();
			Assert.fail("Test failed due to an exception.");
		}
		
		Assert.assertEquals("Wrong result size.", expCnt, this.output.getNumberOfRecords());
	}
	
	@Test
	public void testExternalStreamCrossTask() {

		int keyCnt1 = 2;
		int valCnt1 = 1;
		
		// 87381 fit into memory, 87382 do not!
		int keyCnt2 = 87385;
		int valCnt2 = 1;
		
		final int expCnt = keyCnt1*valCnt1*keyCnt2*valCnt2;
		
		setOutput(this.output);
		
		addInput(new UniformRecordGenerator(keyCnt1, valCnt1, false));
		addInput(new UniformRecordGenerator(keyCnt2, valCnt2, false));
				
		getTaskConfig().setDriverStrategy(DriverStrategy.NESTEDLOOP_STREAMED_OUTER_FIRST);
		getTaskConfig().setMemoryDriver(CROSS_MEM);
		
		final CrossDriver<Record, Record, Record> testTask = new CrossDriver<Record, Record, Record>();
		
		try {
			testDriver(testTask, MockCrossStub.class);
		} catch (Exception e) {
			e.printStackTrace();
			Assert.fail("Test failed due to an exception.");
		}
		
		Assert.assertEquals("Wrong result size.", expCnt, this.output.getNumberOfRecords());
	}
}