library/src/test/java/org/apache/apex/malhar/lib/algo/BottomNUnifierTest.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.algo;

import java.util.ArrayList;
import java.util.HashMap;

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

import com.datatorrent.lib.testbench.CollectorTestSink;

public class BottomNUnifierTest
{
  @SuppressWarnings({ "rawtypes", "unchecked" })
  @Test
  public void testUnifier()
  {

    // Instantiate unifier
    BottomNUnifier<String, Integer> oper = new BottomNUnifier<>();
    oper.setN(2);
    CollectorTestSink sink = new CollectorTestSink();
    oper.mergedport.setSink(sink);

    oper.beginWindow(1);
    ArrayList<Integer> values = new ArrayList<Integer>();
    values.add(5);
    values.add(2);
    HashMap<String, ArrayList<Integer>> tuple = new HashMap<String, ArrayList<Integer>>();
    tuple.put("a", values);
    oper.process(tuple);
    values = new ArrayList<Integer>();
    values.add(3);
    values.add(5);
    tuple = new HashMap<String, ArrayList<Integer>>();
    tuple.put("a", values);
    oper.process(tuple);
    oper.endWindow();

    Assert.assertEquals("Tuples in sink", sink.collectedTuples.size(), 1);
    tuple = (HashMap<String, ArrayList<Integer>>)sink.collectedTuples.get(0);
    values = tuple.get("a");
    Assert.assertEquals(2, values.size());
    Assert.assertEquals(true, values.indexOf(2) >= 0);
    Assert.assertEquals(true, values.indexOf(3) >= 0);
  }
}