library/src/test/java/org/apache/apex/malhar/lib/stream/ArrayListAggregatorTest.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 org.apache.apex.malhar.lib.stream;

import java.util.ArrayList;

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

import org.apache.apex.malhar.lib.testbench.CollectorTestSink;

/**
 * Functional test for {@link org.apache.apex.malhar.lib.stream.ArrayListAggregator}
 */
public class ArrayListAggregatorTest
{
  @SuppressWarnings({ "rawtypes", "unchecked" })
  @Test
  public void testNodeProcessing() throws Exception
  {
    ArrayListAggregator<Integer> oper = new ArrayListAggregator<Integer>();
    CollectorTestSink cSink = new CollectorTestSink();

    oper.output.setSink(cSink);
    oper.setSize(10);
    int numtuples = 100;

    oper.beginWindow(0);
    for (int i = 0; i < numtuples; i++) {
      oper.input.process(i);
    }
    oper.endWindow();
    Assert.assertEquals("number emitted tuples", 10,
        cSink.collectedTuples.size());

    cSink.clear();
    oper.setSize(0);

    oper.beginWindow(1);
    for (int i = 0; i < numtuples; i++) {
      oper.input.process(i);
    }
    oper.endWindow();
    Assert.assertEquals("number emitted tuples", 1, cSink.collectedTuples.size());
    ArrayList<?> list = (ArrayList<?>)cSink.collectedTuples.get(0);
    Assert.assertEquals("number emitted tuples", numtuples, list.size());
  }
}