library/src/test/java/com/datatorrent/lib/math/ChangeAlertMapTest.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 org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.datatorrent.lib.testbench.CollectorTestSink;

/**
 *
 * Functional tests for {@link com.datatorrent.lib.math.ChangeAlertMap}.
 * <p>
 *
 */
public class ChangeAlertMapTest
{
	private static Logger log = LoggerFactory.getLogger(ChangeAlertMapTest.class);

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

	@SuppressWarnings({ "rawtypes", "unchecked" })
  public <V extends Number> void testNodeProcessingSchema(
			ChangeAlertMap<String, V> oper)
	{
		CollectorTestSink alertSink = new CollectorTestSink();

		oper.alert.setSink(alertSink);
		oper.setPercentThreshold(5);

		oper.beginWindow(0);
		HashMap<String, V> input = new HashMap<String, V>();
		input.put("a", oper.getValue(200));
		input.put("b", oper.getValue(10));
		input.put("c", oper.getValue(100));
		oper.data.process(input);

		input.clear();
		input.put("a", oper.getValue(203));
		input.put("b", oper.getValue(12));
		input.put("c", oper.getValue(101));
		oper.data.process(input);

		input.clear();
		input.put("a", oper.getValue(210));
		input.put("b", oper.getValue(12));
		input.put("c", oper.getValue(102));
		oper.data.process(input);

		input.clear();
		input.put("a", oper.getValue(231));
		input.put("b", oper.getValue(18));
		input.put("c", oper.getValue(103));
		oper.data.process(input);
		oper.endWindow();

		// One for a, Two for b
		Assert.assertEquals("number emitted tuples", 3,
				alertSink.collectedTuples.size());

		double aval = 0;
		double bval = 0;
		log.debug("\nLogging tuples");
		for (Object o : alertSink.collectedTuples) {
			HashMap<String, HashMap<Number, Double>> map = (HashMap<String, HashMap<Number, Double>>) o;
			Assert.assertEquals("map size", 1, map.size());
			log.debug(o.toString());
			HashMap<Number, Double> vmap = map.get("a");
			if (vmap != null) {
				aval += vmap.get(231.0).doubleValue();
			}
			vmap = map.get("b");
			if (vmap != null) {
				if (vmap.get(12.0) != null) {
					bval += vmap.get(12.0).doubleValue();
				} else {
					bval += vmap.get(18.0).doubleValue();
				}
			}
		}
		Assert.assertEquals("change in a", 10.0, aval,0);
		Assert.assertEquals("change in a", 70.0, bval,0);
	}
}