library/src/test/java/com/datatorrent/lib/math/QuotientTest.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 java.util.List;

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

import com.datatorrent.api.Sink;

/**
 * Functional tests for {@link com.datatorrent.lib.math.Quotient}
 */
public class QuotientTest
{
	class TestSink implements Sink<Object>
	{
		List<Object> collectedTuples = new ArrayList<Object>();

		@Override
		public void put(Object payload)
		{
          collectedTuples.add(payload);
		}

		@Override
		public int getCount(boolean reset)
		{
			throw new UnsupportedOperationException("Not supported yet.");
		}
	}

	/**
	 * Test oper logic emits correct results.
	 */
	@Test
	public void testNodeSchemaProcessing()
	{
		Quotient<Double> oper = new Quotient<Double>();
		TestSink quotientSink = new TestSink();
		oper.quotient.setSink(quotientSink);

		oper.setMult_by(2);

		oper.beginWindow(0); //
		Double a = new Double(30.0);
		Double b = new Double(20.0);
		Double c = new Double(100.0);
		oper.denominator.process(a);
		oper.denominator.process(b);
		oper.denominator.process(c);

		a = 5.0;
		oper.numerator.process(a);
		a = 1.0;
		oper.numerator.process(a);
		b = 44.0;
		oper.numerator.process(b);

		b = 10.0;
		oper.numerator.process(b);
		c = 22.0;
		oper.numerator.process(c);
		c = 18.0;
		oper.numerator.process(c);

		a = 0.5;
		oper.numerator.process(a);
		b = 41.5;
		oper.numerator.process(b);
		a = 8.0;
		oper.numerator.process(a);
		oper.endWindow(); //

		// payload should be 1 bag of tuples with keys "a", "b", "c", "d", "e"
		Assert.assertEquals("number emitted tuples", 1,
				quotientSink.collectedTuples.size());
		for (Object o : quotientSink.collectedTuples) { // sum is 1157
			Double val = (Double) o;
			Assert.assertEquals("emitted quotient value was ", new Double(2.0), val);
		}
	}
}