/*
    *    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 org.apache.ibatis.cache.decorators.SerializedCache;
  import org.apache.ibatis.cache.impl.PerpetualCache;
  import org.junit.jupiter.api.Test;
  
  import java.io.Serializable;
  import java.util.Objects;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  class SerializedCacheTest {
  
    @Test
    void shouldDemonstrateSerializedObjectAreEqual() {
      SerializedCache cache = new SerializedCache(new PerpetualCache("default"));
      for (int i = 0; i < 5; i++) {
        cache.putObject(i, new CachingObject(i));
      }
      for (int i = 0; i < 5; i++) {
        assertEquals(new CachingObject(i), cache.getObject(i));
      }
    }
  
    @Test
    void shouldDemonstrateNullsAreSerializable() {
      SerializedCache cache = new SerializedCache(new PerpetualCache("default"));
      for (int i = 0; i < 5; i++) {
        cache.putObject(i, null);
      }
      for (int i = 0; i < 5; i++) {
        assertEquals(null, cache.getObject(i));
      }
    }
  
    @Test
    void throwExceptionWhenTryingToCacheNonSerializableObject() {
      SerializedCache cache = new SerializedCache(new PerpetualCache("default"));
      assertThrows(CacheException.class,
        () -> cache.putObject(0, new CachingObjectWithoutSerializable(0)));
    }
  
    static class CachingObject implements Serializable {
      int x;
  
      public CachingObject(int x) {
        this.x = x;
      }
  
      @Override
      public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        CachingObject obj = (CachingObject) o;
        return x == obj.x;
      }
  
      @Override
      public int hashCode() {
        return Objects.hash(x);
      }
    }
  
    static class CachingObjectWithoutSerializable {
      int x;
  
      public CachingObjectWithoutSerializable(int x) {
        this.x = x;
      }
  
      @Override
      public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        CachingObjectWithoutSerializable obj = (CachingObjectWithoutSerializable) o;
        return x == obj.x;
      }
  
      @Override
      public int hashCode() {
        return Objects.hash(x);
      }
    }
 }