/*
    *    Copyright 2009-2021 the original author or authors.
    *
    *    Licensed 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.ibatis.cache;
  
  import static org.junit.jupiter.api.Assertions.*;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.NotSerializableException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.util.Date;
  
  import org.junit.jupiter.api.Test;
  
  class CacheKeyTest {
  
    @Test
    void shouldTestCacheKeysEqual() {
      Date date = new Date();
      CacheKey key1 = new CacheKey(new Object[] { 1, "hello", null, new Date(date.getTime()) });
      CacheKey key2 = new CacheKey(new Object[] { 1, "hello", null, new Date(date.getTime()) });
      assertEquals(key1, key2);
      assertEquals(key2, key1);
      assertEquals(key1.hashCode(), key2.hashCode());
      assertEquals(key1.toString(), key2.toString());
    }
  
    @Test
    void shouldTestCacheKeysNotEqualDueToDateDifference() throws Exception {
      CacheKey key1 = new CacheKey(new Object[] { 1, "hello", null, new Date() });
      Thread.sleep(1000);
      CacheKey key2 = new CacheKey(new Object[] { 1, "hello", null, new Date() });
      assertNotEquals(key1, key2);
      assertNotEquals(key2, key1);
      assertNotEquals(key1.hashCode(), key2.hashCode());
      assertNotEquals(key1.toString(), key2.toString());
    }
  
    @Test
    void shouldTestCacheKeysNotEqualDueToOrder() throws Exception {
      CacheKey key1 = new CacheKey(new Object[] { 1, "hello", null });
      Thread.sleep(1000);
      CacheKey key2 = new CacheKey(new Object[] { 1, null, "hello" });
      assertNotEquals(key1, key2);
      assertNotEquals(key2, key1);
      assertNotEquals(key1.hashCode(), key2.hashCode());
      assertNotEquals(key1.toString(), key2.toString());
    }
  
    @Test
    void shouldDemonstrateEmptyAndNullKeysAreEqual() {
      CacheKey key1 = new CacheKey();
      CacheKey key2 = new CacheKey();
      assertEquals(key1, key2);
      assertEquals(key2, key1);
      key1.update(null);
      key2.update(null);
      assertEquals(key1, key2);
      assertEquals(key2, key1);
      key1.update(null);
      key2.update(null);
      assertEquals(key1, key2);
      assertEquals(key2, key1);
    }
  
    @Test
    void shouldTestCacheKeysWithBinaryArrays() {
      byte[] array1 = new byte[] { 1 };
      byte[] array2 = new byte[] { 1 };
      CacheKey key1 = new CacheKey(new Object[] { array1 });
      CacheKey key2 = new CacheKey(new Object[] { array2 });
      assertEquals(key1, key2);
    }
  
    @Test
    void throwExceptionWhenTryingToUpdateNullCacheKey() {
      CacheKey cacheKey = CacheKey.NULL_CACHE_KEY;
      assertThrows(CacheException.class, () -> cacheKey.update("null"));
    }
  
    @Test
    void throwExceptionWhenTryingToUpdateAllNullCacheKey() {
      CacheKey cacheKey = CacheKey.NULL_CACHE_KEY;
      assertThrows(CacheException.class, () -> cacheKey.updateAll(new Object[]{"null", "null"}));
    }
 
   @Test
   void shouldDemonstrateClonedNullCacheKeysAreEqual() throws Exception {
     CacheKey cacheKey = CacheKey.NULL_CACHE_KEY;
     CacheKey clonedCacheKey = cacheKey.clone();
     assertEquals(cacheKey, clonedCacheKey);
     assertEquals(cacheKey.hashCode(), clonedCacheKey.hashCode());
   }
 
   @Test
   void serializationExceptionTest() {
     CacheKey cacheKey = new CacheKey();
     cacheKey.update(new Object());
     assertThrows(NotSerializableException.class, () -> {
       serialize(cacheKey);
     });
   }
 
   @Test
   void serializationTest() throws Exception {
     CacheKey cacheKey = new CacheKey();
     cacheKey.update("serializable");
     assertEquals(cacheKey, serialize(cacheKey));
   }
 
   private static <T> T serialize(T object) throws Exception {
       ByteArrayOutputStream baos = new ByteArrayOutputStream();
       new ObjectOutputStream(baos).writeObject(object);
 
       ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
       return (T) new ObjectInputStream(bais).readObject();
   }
 
 }