library/src/test/java/com/datatorrent/lib/math/SigmaTest.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.math;

import java.util.ArrayList;

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

import com.datatorrent.lib.testbench.SumTestSink;

/**
 * 
 * Functional tests for {@link com.datatorrent.lib.math.Sigma}
 * <p>
 * 
 */
public class SigmaTest
{
	/**
	 * Test oper logic emits correct results
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	@Test
	public void testNodeSchemaProcessing()
	{
		Sigma oper = new Sigma();
		SumTestSink lmultSink = new SumTestSink();
		SumTestSink imultSink = new SumTestSink();
		SumTestSink dmultSink = new SumTestSink();
		SumTestSink fmultSink = new SumTestSink();
		oper.longResult.setSink(lmultSink);
		oper.integerResult.setSink(imultSink);
		oper.doubleResult.setSink(dmultSink);
		oper.floatResult.setSink(fmultSink);

		int sum = 0;
		ArrayList<Integer> list = new ArrayList<Integer>();
		for (int i = 0; i < 100; i++) {
			list.add(i);
			sum += i;
		}

		oper.beginWindow(0); //
		oper.input.process(list);
		oper.endWindow(); //

		oper.beginWindow(1); //
		oper.input.process(list);
		oper.endWindow(); //
		sum = sum * 2;

		Assert.assertEquals("sum was", sum, lmultSink.val.intValue());
		Assert.assertEquals("sum was", sum, imultSink.val.intValue());
		Assert.assertEquals("sum was", sum, dmultSink.val.intValue());
		Assert.assertEquals("sum", sum, fmultSink.val.intValue());
	}
}