library/src/test/java/com/datatorrent/lib/math/QuotientMapTest.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.HashMap;
import java.util.Map;

import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.datatorrent.lib.testbench.CountAndLastTupleTestSink;

/**
 * Functional tests for {@link com.datatorrent.lib.math.QuotientMap}
 */
public class QuotientMapTest
{
	private static Logger LOG = LoggerFactory.getLogger(QuotientMap.class);

	/**
	 * Test node logic emits correct results
	 */
	@Test
	public void testNodeProcessing() throws Exception
	{
		testNodeProcessingSchema(new QuotientMap<String, Integer>());
		testNodeProcessingSchema(new QuotientMap<String, Double>());
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	public void testNodeProcessingSchema(QuotientMap oper) throws Exception
	{
		CountAndLastTupleTestSink quotientSink = new CountAndLastTupleTestSink();

		oper.quotient.setSink(quotientSink);
		oper.setMult_by(2);

		oper.beginWindow(0); //
		HashMap<String, Number> input = new HashMap<String, Number>();
		int numtuples = 100;
		for (int i = 0; i < numtuples; i++) {
			input.clear();
			input.put("a", 2);
			input.put("b", 20);
			input.put("c", 1000);
			oper.numerator.process(input);
			input.clear();
			input.put("a", 2);
			input.put("b", 40);
			input.put("c", 500);
			oper.denominator.process(input);
		}

		oper.endWindow();

		// One for each key
		Assert.assertEquals("number emitted tuples", 1, quotientSink.count);
		HashMap<String, Number> output = (HashMap<String, Number>) quotientSink.tuple;
		for (Map.Entry<String, Number> e : output.entrySet()) {
			if (e.getKey().equals("a")) {
				Assert.assertEquals("emitted value for 'a' was ", new Double(2),
						e.getValue());
			} else if (e.getKey().equals("b")) {
				Assert.assertEquals("emitted tuple for 'b' was ", new Double(1),
						e.getValue());
			} else if (e.getKey().equals("c")) {
				Assert.assertEquals("emitted tuple for 'c' was ", new Double(4),
						e.getValue());
			} else {
				LOG.debug(String.format("key was %s", e.getKey()));
			}
		}
	}
}