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.values;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  import static org.hamcrest.Matchers.not;
  import static org.junit.Assert.assertEquals;
  
  import java.util.Comparator;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for KV. */
  @RunWith(JUnit4.class)
  public class KVTest {
    private static final Integer[] TEST_VALUES = {
      null, Integer.MIN_VALUE, -1, 0, 1, Integer.MAX_VALUE
    };
  
    // Wrapper around Integer.compareTo() to support null values.
    private int compareInt(Integer a, Integer b) {
      if (a == null) {
        return b == null ? 0 : -1;
      } else {
        return b == null ? 1 : a.compareTo(b);
      }
    }
  
    @Test
    public void testEquals() {
      // Neither position are arrays
      assertThat(KV.of(1, 2), equalTo(KV.of(1, 2)));
  
      // Key is array
      assertThat(KV.of(new int[] {1, 2}, 3), equalTo(KV.of(new int[] {1, 2}, 3)));
  
      // Value is array
      assertThat(KV.of(1, new int[] {2, 3}), equalTo(KV.of(1, new int[] {2, 3})));
  
      // Both are arrays
      assertThat(
          KV.of(new int[] {1, 2}, new int[] {3, 4}),
          equalTo(KV.of(new int[] {1, 2}, new int[] {3, 4})));
  
      // Unfortunately, deep equals only goes so far
      assertThat(
          KV.of(ImmutableList.of(new int[] {1, 2}), 3),
          not(equalTo(KV.of(ImmutableList.of(new int[] {1, 2}), 3))));
      assertThat(
          KV.of(1, ImmutableList.of(new int[] {2, 3})),
          not(equalTo(KV.of(1, ImmutableList.of(new int[] {2, 3})))));
  
      // Key is array and differs
      assertThat(KV.of(new int[] {1, 2}, 3), not(equalTo(KV.of(new int[] {1, 37}, 3))));
  
      // Key is non-array and differs
      assertThat(KV.of(1, new int[] {2, 3}), not(equalTo(KV.of(37, new int[] {1, 2}))));
  
      // Value is array and differs
      assertThat(KV.of(1, new int[] {2, 3}), not(equalTo(KV.of(1, new int[] {37, 3}))));
  
      // Value is non-array and differs
      assertThat(KV.of(new byte[] {1, 2}, 3), not(equalTo(KV.of(new byte[] {1, 2}, 37))));
    }
  
    @Test
    public void testOrderByKey() {
      Comparator<KV<Integer, Integer>> orderByKey = new KV.OrderByKey<>();
      for (Integer key1 : TEST_VALUES) {
        for (Integer val1 : TEST_VALUES) {
          for (Integer key2 : TEST_VALUES) {
            for (Integer val2 : TEST_VALUES) {
              assertEquals(
                  compareInt(key1, key2), orderByKey.compare(KV.of(key1, val1), KV.of(key2, val2)));
            }
          }
        }
      }
    }
  
    @Test
    public void testOrderByValue() {
      Comparator<KV<Integer, Integer>> orderByValue = new KV.OrderByValue<>();
      for (Integer key1 : TEST_VALUES) {
        for (Integer val1 : TEST_VALUES) {
          for (Integer key2 : TEST_VALUES) {
            for (Integer val2 : TEST_VALUES) {
              assertEquals(
                  compareInt(val1, val2), orderByValue.compare(KV.of(key1, val1), KV.of(key2, val2)));
            }
          }
        }
      }
    }
  }
  