/*
    * 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.DoubleWritable;
  import org.junit.Test;
  
  public class TestDoubleAggregators {
  
    @Test
    public void testMaxAggregator() {
      DoubleMaxAggregator max = new DoubleMaxAggregator();
      max.aggregate(new DoubleWritable(2.0));
      max.aggregate(new DoubleWritable(3.0));
      assertEquals(3.0, max.getAggregatedValue().get(), 0d);
      max.setAggregatedValue(new DoubleWritable(1.0));
      assertEquals(1.0, max.getAggregatedValue().get(), 0d);
      DoubleWritable dw = max.createInitialValue();
      assertNotNull(dw);
    }
  
    @Test
    public void testMinAggregator() {
      DoubleMinAggregator min = new DoubleMinAggregator();
      min.aggregate(new DoubleWritable(3.0));
      min.aggregate(new DoubleWritable(2.0));
      assertEquals(2.0, min.getAggregatedValue().get(), 0d);
      min.setAggregatedValue(new DoubleWritable(3.0));
      assertEquals(3.0, min.getAggregatedValue().get(), 0d);
      DoubleWritable dw = min.createInitialValue();
      assertNotNull(dw);
    }
  
    @Test
    public void testOverwriteAggregator() {
      DoubleOverwriteAggregator overwrite = new DoubleOverwriteAggregator();
      overwrite.aggregate(new DoubleWritable(1.0));
      assertEquals(1.0, overwrite.getAggregatedValue().get(), 0d);
      overwrite.aggregate(new DoubleWritable(2.0));
      assertEquals(2.0, overwrite.getAggregatedValue().get(), 0d);
      overwrite.setAggregatedValue(new DoubleWritable(3.0));
      assertEquals(3.0, overwrite.getAggregatedValue().get(), 0d);
      DoubleWritable dw = overwrite.createInitialValue();
      assertNotNull(dw);
    }
  
    @Test
    public void testProductAggregator() {
      DoubleProductAggregator product = new DoubleProductAggregator();
      product.aggregate(new DoubleWritable(6.0));
      product.aggregate(new DoubleWritable(7.0));
      assertEquals(42.0, product.getAggregatedValue().get(), 0d);
      product.setAggregatedValue(new DoubleWritable(1.0));
      assertEquals(1.0, product.getAggregatedValue().get(), 0d);
      DoubleWritable dw = product.createInitialValue();
      assertNotNull(dw);
    }
  
    @Test
    public void testSumAggregator() {
      DoubleSumAggregator sum = new DoubleSumAggregator();
      sum.aggregate(new DoubleWritable(1.0));
      sum.aggregate(new DoubleWritable(2.0));
      assertEquals(3.0, sum.getAggregatedValue().get(), 0d);
      sum.setAggregatedValue(new DoubleWritable(4.0));
      assertEquals(4.0, sum.getAggregatedValue().get(), 0d);
      DoubleWritable dw = sum.createInitialValue();
      assertNotNull(dw);
    }
  
  }