library/src/test/java/com/datatorrent/lib/math/MaxKeyValTest.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.api.BaseOperator;
import com.datatorrent.api.DefaultInputPort;
import com.datatorrent.api.DefaultOutputPort;
import com.datatorrent.api.InputOperator;

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

/**
 *
 * Functional tests for {@link com.datatorrent.lib.math.MaxKeyVal}. <p>
 *
 */
public class MaxKeyValTest
{
  /**
   * Test functional logic
   */
  @Test
  public void testNodeProcessing()
  {
    testSchemaNodeProcessing(new MaxKeyVal<String, Integer>(), "integer");
    testSchemaNodeProcessing(new MaxKeyVal<String, Double>(), "double");
    testSchemaNodeProcessing(new MaxKeyVal<String, Long>(), "long");
    testSchemaNodeProcessing(new MaxKeyVal<String, Short>(), "short");
    testSchemaNodeProcessing(new MaxKeyVal<String, Float>(), "float");
  }

  /**
   * Test operator logic emits correct results for each schema.
   *
   */
  @SuppressWarnings({ "rawtypes", "unchecked" })
  public void testSchemaNodeProcessing(MaxKeyVal oper, String type)
  {
    CountAndLastTupleTestSink maxSink = new CountAndLastTupleTestSink();
    oper.max.setSink(maxSink);

    oper.beginWindow(0);

    int numtuples = 10000;
    if (type.equals("integer")) {
      for (int i = 0; i < numtuples; i++) {
        oper.data.process(new KeyValPair("a", new Integer(i)));
      }
    }
    else if (type.equals("double")) {
      for (int i = 0; i < numtuples; i++) {
        oper.data.process(new KeyValPair("a", new Double(i)));
      }
    }
    else if (type.equals("long")) {
      for (int i = 0; i < numtuples; i++) {
        oper.data.process(new KeyValPair("a", new Long(i)));
      }
    }
    else if (type.equals("short")) {
      int count = numtuples / 1000; // cannot cross 64K
      for (short j = 0; j < count; j++) {
        oper.data.process(new KeyValPair("a", new Short(j)));
      }
    }
    else if (type.equals("float")) {
      for (int i = 0; i < numtuples; i++) {
        oper.data.process(new KeyValPair("a", new Float(i)));
      }
    }

    oper.endWindow();

    Assert.assertEquals("number emitted tuples", 1, maxSink.count);
    Number val = ((KeyValPair<String, Number>)maxSink.tuple).getValue().intValue();
    if (type.equals("short")) {
      Assert.assertEquals("emitted max value was ", (new Double(numtuples / 1000 - 1)).intValue(), val);
    }
    else {
      Assert.assertEquals("emitted max value was ", (new Double(numtuples - 1)).intValue(), val);
    }
  }

  /**
   * Used to test partitioning.
   */
  public static class TestInputOperator extends BaseOperator implements InputOperator
  {
    public final transient DefaultOutputPort<KeyValPair<String, Integer>> output = new DefaultOutputPort<KeyValPair<String, Integer>>();
    private transient boolean first = true;

    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Override
    public void emitTuples()
    {
      if (first) {
        for (int i = 0; i < 100; i++) {
          output.emit(new KeyValPair("a", new Integer(i)));
        }
        for (int i = 0; i < 80; i++) {
          output.emit(new KeyValPair("b", new Integer(i)));
        }
        for (int i = 0; i < 60; i++) {
          output.emit(new KeyValPair("c", new Integer(i)));
        }
        first = false;
      }
    }
  }

  public static class CollectorOperator extends BaseOperator
  {
    public static final ArrayList<KeyValPair<String, Integer>> buffer = new ArrayList<KeyValPair<String, Integer>>();
    public final transient DefaultInputPort<KeyValPair<String, Integer>> input = new DefaultInputPort<KeyValPair<String, Integer>>()
    {
      @SuppressWarnings({ "unchecked", "rawtypes" })
      @Override
      public void process(KeyValPair<String, Integer> tuple)
      {
        buffer.add(new KeyValPair(tuple.getKey(), tuple.getValue()));
      }
    };
  }
}