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.kafka.streams;
  
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.Timeout;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  
  @Timeout(600)
  public class KeyValueTest {
  
      @Test
      public void shouldHaveSameEqualsAndHashCode() {
          final KeyValue<String, Long> kv = KeyValue.pair("key1", 1L);
          final KeyValue<String, Long> copyOfKV = KeyValue.pair(kv.key, kv.value);
  
          // Reflexive
          assertEquals(kv, kv);
          assertEquals(kv.hashCode(), kv.hashCode());
  
          // Symmetric
          assertEquals(kv, copyOfKV);
          assertEquals(kv.hashCode(), copyOfKV.hashCode());
          assertEquals(copyOfKV.hashCode(), kv.hashCode());
  
          // Transitive
          final KeyValue<String, Long> copyOfCopyOfKV = KeyValue.pair(copyOfKV.key, copyOfKV.value);
          assertEquals(copyOfKV, copyOfCopyOfKV);
          assertEquals(copyOfKV.hashCode(), copyOfCopyOfKV.hashCode());
          assertEquals(kv, copyOfCopyOfKV);
          assertEquals(kv.hashCode(), copyOfCopyOfKV.hashCode());
  
          // Inequality scenarios
          assertNotEquals(null, kv, "must be false for null");
          assertNotEquals(kv, KeyValue.pair(null, kv.value), "must be false if key is non-null and other key is null");
          assertNotEquals(kv, KeyValue.pair(kv.key, null), "must be false if value is non-null and other value is null");
          final KeyValue<Long, Long> differentKeyType = KeyValue.pair(1L, kv.value);
          assertNotEquals(kv, differentKeyType, "must be false for different key types");
          final KeyValue<String, String> differentValueType = KeyValue.pair(kv.key, "anyString");
          assertNotEquals(kv, differentValueType, "must be false for different value types");
          final KeyValue<Long, String> differentKeyValueTypes = KeyValue.pair(1L, "anyString");
          assertNotEquals(kv, differentKeyValueTypes, "must be false for different key and value types");
          assertNotEquals(kv, new Object(), "must be false for different types of objects");
  
          final KeyValue<String, Long> differentKey = KeyValue.pair(kv.key + "suffix", kv.value);
          assertNotEquals(kv, differentKey, "must be false if key is different");
          assertNotEquals(differentKey, kv, "must be false if key is different");
  
          final KeyValue<String, Long> differentValue = KeyValue.pair(kv.key, kv.value + 1L);
          assertNotEquals(kv, differentValue, "must be false if value is different");
          assertNotEquals(differentValue, kv, "must be false if value is different");
  
          final KeyValue<String, Long> differentKeyAndValue = KeyValue.pair(kv.key + "suffix", kv.value + 1L);
          assertNotEquals(kv, differentKeyAndValue, "must be false if key and value are different");
          assertNotEquals(differentKeyAndValue, kv, "must be false if key and value are different");
      }
  
  }