/*
    * 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.giraph.aggregators;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  
  import org.apache.hadoop.io.IntWritable;
  import org.junit.Test;
  
  public class TestIntAggregators {
  
    @Test
    public void testMaxAggregator() {
      IntMaxAggregator max = new IntMaxAggregator();
      max.aggregate(new IntWritable(2));
      max.aggregate(new IntWritable(3));
      assertEquals(3, max.getAggregatedValue().get());
      max.setAggregatedValue(new IntWritable(1));
      assertEquals(1, max.getAggregatedValue().get());
      IntWritable iw = max.createInitialValue();
      assertNotNull(iw);
    }
  
    @Test
    public void testMinAggregator() {
      IntMinAggregator min = new IntMinAggregator();
      min.aggregate(new IntWritable(3));
      min.aggregate(new IntWritable(2));
      assertEquals(2, min.getAggregatedValue().get());
      min.setAggregatedValue(new IntWritable(3));
      assertEquals(3, min.getAggregatedValue().get());
      IntWritable iw = min.createInitialValue();
      assertNotNull(iw);
    }
  
    @Test
    public void testOverwriteAggregator() {
      IntOverwriteAggregator overwrite = new IntOverwriteAggregator();
      overwrite.aggregate(new IntWritable(1));
      assertEquals(1, overwrite.getAggregatedValue().get());
      overwrite.aggregate(new IntWritable(2));
      assertEquals(2, overwrite.getAggregatedValue().get());
      overwrite.setAggregatedValue(new IntWritable(3));
      assertEquals(3, overwrite.getAggregatedValue().get());
      IntWritable iw = overwrite.createInitialValue();
      assertNotNull(iw);
    }
    
    @Test
    public void testProductAggregator() {
      IntProductAggregator product = new IntProductAggregator();
      product.aggregate(new IntWritable(6));
      product.aggregate(new IntWritable(7));
      assertEquals(42, product.getAggregatedValue().get());
      product.setAggregatedValue(new IntWritable(1));
      assertEquals(1, product.getAggregatedValue().get());
      IntWritable iw = product.createInitialValue();
      assertNotNull(iw);
    }
  
    @Test
    public void testSumAggregator() {
      IntSumAggregator sum = new IntSumAggregator();
      sum.aggregate(new IntWritable(1));
      sum.aggregate(new IntWritable(2));
      assertEquals(3, sum.getAggregatedValue().get());
      sum.setAggregatedValue(new IntWritable(4));
      assertEquals(4, sum.getAggregatedValue().get());
      IntWritable iw = sum.createInitialValue();
      assertNotNull(iw);
    }
  
  }