content: /*
   * 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 test.org.apache.spark.java8.sql;
  
  import java.util.Arrays;
  
  import org.junit.Assert;
  import org.junit.Test;
  import scala.Tuple2;
  
  import org.apache.spark.sql.Dataset;
  import org.apache.spark.sql.KeyValueGroupedDataset;
  import org.apache.spark.sql.expressions.javalang.typed;
  import test.org.apache.spark.sql.JavaDatasetAggregatorSuiteBase;
  
  /**
   * Suite that replicates tests in JavaDatasetAggregatorSuite using lambda syntax.
   */
  public class Java8DatasetAggregatorSuite extends JavaDatasetAggregatorSuiteBase {
    @Test
    public void testTypedAggregationAverage() {
      KeyValueGroupedDataset<String, Tuple2<String, Integer>> grouped = generateGroupedDataset();
      Dataset<Tuple2<String, Double>> agged = grouped.agg(typed.avg(v -> (double)(v._2() * 2)));
      Assert.assertEquals(Arrays.asList(tuple2("a", 3.0), tuple2("b", 6.0)), agged.collectAsList());
    }
  
    @Test
    public void testTypedAggregationCount() {
      KeyValueGroupedDataset<String, Tuple2<String, Integer>> grouped = generateGroupedDataset();
      Dataset<Tuple2<String, Long>> agged = grouped.agg(typed.count(v -> v));
      Assert.assertEquals(Arrays.asList(tuple2("a", 2L), tuple2("b", 1L)), agged.collectAsList());
    }
  
    @Test
    public void testTypedAggregationSumDouble() {
      KeyValueGroupedDataset<String, Tuple2<String, Integer>> grouped = generateGroupedDataset();
      Dataset<Tuple2<String, Double>> agged = grouped.agg(typed.sum(v -> (double)v._2()));
      Assert.assertEquals(Arrays.asList(tuple2("a", 3.0), tuple2("b", 3.0)), agged.collectAsList());
    }
  
    @Test
    public void testTypedAggregationSumLong() {
      KeyValueGroupedDataset<String, Tuple2<String, Integer>> grouped = generateGroupedDataset();
      Dataset<Tuple2<String, Long>> agged = grouped.agg(typed.sumLong(v -> (long)v._2()));
      Assert.assertEquals(Arrays.asList(tuple2("a", 3L), tuple2("b", 3L)), agged.collectAsList());
    }
  }
  