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 org.apache.beam.sdk.extensions.euphoria.core.client.util;
  
  import static org.junit.Assert.assertEquals;
  
  import java.util.stream.Stream;
  import org.apache.beam.sdk.extensions.euphoria.core.client.operator.ReduceByKey;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Test suite for @{link Sums}. */
  @RunWith(JUnit4.class)
  public class SumsTest {
  
    @Test
    public void testSumOfInts() {
      assertEquals(6, (int) apply(Stream.of(1, 2, 3), Sums.ofInts()));
    }
  
    @Test
    public void testSumOfLongs() {
      assertEquals(6L, (long) apply(Stream.of(1L, 2L, 3L), Sums.ofLongs()));
    }
  
    @Test
    public void testSumOfFloats() {
      assertEquals(6f, (float) apply(Stream.of(1f, 2f, 3f), Sums.ofFloats()), 0.001);
    }
  
    @Test
    public void testSumOfDoubles() {
      assertEquals(6.0, (double) apply(Stream.of(1.0, 2.0, 3.0), Sums.ofDoubles()), 0.001);
    }
  
    private <T> T apply(Stream<T> stream, ReduceByKey.CombineFunctionWithIdentity<T> fn) {
      return stream.reduce(fn.identity(), fn::apply);
    }
  }
  