library/src/test/java/com/datatorrent/lib/math/AverageKeyValTest.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 org.junit.Assert;
import org.junit.Test;

import com.datatorrent.lib.testbench.CollectorTestSink;
import com.datatorrent.lib.util.KeyValPair;

/**
 *
 * Functional tests for {@link com.datatorrent.lib.math.AverageKeyVal}.
 * <p>
 *
 */
public class AverageKeyValTest
{
	/**
	 * Test operator logic emits correct results.
	 */
	@SuppressWarnings({ "unchecked", "rawtypes" })
	@Test
	public void testNodeProcessing()
	{
		AverageKeyVal<String> oper = new AverageKeyVal<String>();
		CollectorTestSink averageSink = new CollectorTestSink();

		oper.doubleAverage.setSink(averageSink);

		oper.beginWindow(0); //

		oper.data.process(new KeyValPair("a", 2.0));
		oper.data.process(new KeyValPair("b", 20.0));
		oper.data.process(new KeyValPair("c", 1000.0));
		oper.data.process(new KeyValPair("a", 1.0));
		oper.data.process(new KeyValPair("a", 10.0));
		oper.data.process(new KeyValPair("b", 5.0));
		oper.data.process(new KeyValPair("d", 55.0));
		oper.data.process(new KeyValPair("b", 12.0));
		oper.data.process(new KeyValPair("d", 22.0));
		oper.data.process(new KeyValPair("d", 14.2));
		oper.data.process(new KeyValPair("d", 46.0));
		oper.data.process(new KeyValPair("e", 2.0));
		oper.data.process(new KeyValPair("a", 23.0));
		oper.data.process(new KeyValPair("d", 4.0));

		oper.endWindow(); //

		Assert.assertEquals("number emitted tuples", 5,
				averageSink.collectedTuples.size());
		for (Object o : averageSink.collectedTuples) {
			KeyValPair<String, Double> e = (KeyValPair<String, Double>) o;
			Double val = e.getValue();
			if (e.getKey().equals("a")) {
				Assert.assertEquals("emitted value for 'a' was ", new Double(36 / 4.0),
						val);
			} else if (e.getKey().equals("b")) {
				Assert.assertEquals("emitted tuple for 'b' was ", new Double(37 / 3.0),
						val);
			} else if (e.getKey().equals("c")) {
				Assert.assertEquals("emitted tuple for 'c' was ",
						new Double(1000 / 1.0), val);
			} else if (e.getKey().equals("d")) {
				Assert.assertEquals("emitted tuple for 'd' was ",
						new Double(141.2 / 5), val);
			} else if (e.getKey().equals("e")) {
				Assert.assertEquals("emitted tuple for 'e' was ", new Double(2 / 1.0),
						val);
			}
		}
	}
}