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.transforms;
  
  import static org.apache.beam.sdk.testing.CombineFnTester.testCombineFn;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotEquals;
  
  import org.apache.beam.sdk.coders.BigEndianIntegerCoder;
  import org.apache.beam.sdk.coders.BigEndianLongCoder;
  import org.apache.beam.sdk.coders.CoderRegistry;
  import org.apache.beam.sdk.coders.DoubleCoder;
  import org.apache.beam.sdk.coders.VarIntCoder;
  import org.apache.beam.sdk.coders.VarLongCoder;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.Lists;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for Sum. */
  @RunWith(JUnit4.class)
  public class SumTest {
    private static final CoderRegistry STANDARD_REGISTRY = CoderRegistry.createDefault();
  
    @Test
    public void testSumGetNames() {
      assertEquals("Combine.globally(SumInteger)", Sum.integersGlobally().getName());
      assertEquals("Combine.globally(SumDouble)", Sum.doublesGlobally().getName());
      assertEquals("Combine.globally(SumLong)", Sum.longsGlobally().getName());
      assertEquals("Combine.perKey(SumInteger)", Sum.integersPerKey().getName());
      assertEquals("Combine.perKey(SumDouble)", Sum.doublesPerKey().getName());
      assertEquals("Combine.perKey(SumLong)", Sum.longsPerKey().getName());
    }
  
    @Test
    public void testSumIntegerFn() {
      testCombineFn(Sum.ofIntegers(), Lists.newArrayList(1, 2, 3, 4), 10);
    }
  
    @Test
    public void testSumLongFn() {
      testCombineFn(Sum.ofLongs(), Lists.newArrayList(1L, 2L, 3L, 4L), 10L);
    }
  
    @Test
    public void testSumDoubleFn() {
      testCombineFn(Sum.ofDoubles(), Lists.newArrayList(1.0, 2.0, 3.0, 4.0), 10.0);
    }
  
    @Test
    public void testSumDoubleFnInfinity() {
      testCombineFn(
          Sum.ofDoubles(),
          Lists.newArrayList(Double.NEGATIVE_INFINITY, 2.0, 3.0, Double.POSITIVE_INFINITY),
          Double.NaN);
    }
  
    @Test
    public void testSumDoubleFnPositiveInfinity() {
      testCombineFn(
          Sum.ofDoubles(),
          Lists.newArrayList(1.0, 2.0, 3.0, Double.POSITIVE_INFINITY),
          Double.POSITIVE_INFINITY);
    }
  
    @Test
    public void testSumDoubleFnNegativeInfinity() {
      testCombineFn(
          Sum.ofDoubles(),
          Lists.newArrayList(Double.NEGATIVE_INFINITY, 2.0, 3.0, 4.0),
          Double.NEGATIVE_INFINITY);
    }
  
    @Test
    public void testSumDoubleFnNan() {
      testCombineFn(Sum.ofDoubles(), Lists.newArrayList(1.0, 2.0, 3.0, Double.NaN), Double.NaN);
    }
  
    @Test
    public void testGetAccumulatorCoderEquals() {
      Combine.BinaryCombineIntegerFn sumIntegerFn = Sum.ofIntegers();
      assertEquals(
          sumIntegerFn.getAccumulatorCoder(STANDARD_REGISTRY, VarIntCoder.of()),
          sumIntegerFn.getAccumulatorCoder(STANDARD_REGISTRY, VarIntCoder.of()));
      assertNotEquals(
          sumIntegerFn.getAccumulatorCoder(STANDARD_REGISTRY, VarIntCoder.of()),
          sumIntegerFn.getAccumulatorCoder(STANDARD_REGISTRY, BigEndianIntegerCoder.of()));
  
      Combine.BinaryCombineLongFn sumLongFn = Sum.ofLongs();
      assertEquals(
          sumLongFn.getAccumulatorCoder(STANDARD_REGISTRY, VarLongCoder.of()),
          sumLongFn.getAccumulatorCoder(STANDARD_REGISTRY, VarLongCoder.of()));
      assertNotEquals(
          sumLongFn.getAccumulatorCoder(STANDARD_REGISTRY, VarLongCoder.of()),
          sumLongFn.getAccumulatorCoder(STANDARD_REGISTRY, BigEndianLongCoder.of()));
  
      Combine.BinaryCombineDoubleFn sumDoubleFn = Sum.ofDoubles();
      assertEquals(
          sumDoubleFn.getAccumulatorCoder(STANDARD_REGISTRY, DoubleCoder.of()),
          sumDoubleFn.getAccumulatorCoder(STANDARD_REGISTRY, DoubleCoder.of()));
    }
  }
  