content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.nacos.common.cache.decorators;
  
  import com.alibaba.nacos.common.cache.Cache;
  import com.alibaba.nacos.common.cache.builder.CacheBuilder;
  import org.junit.jupiter.api.Test;
  
  import java.util.stream.IntStream;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  /**
   * lru test .
   *
   * @author zzq
   * @date 2021/7/30
   */
  class LruCacheTest {
      
      @Test
      void testBasic() throws Exception {
          int capacity = 10;
          int start = 0;
          int end = 99;
          Cache cache = CacheBuilder.builder().maximumSize(capacity).lru(true).build();
          IntStream.range(start, end).forEach(item -> cache.put(item, item));
          assertEquals(capacity, cache.getSize());
          assertNull(cache.get(start));
          assertEquals(89, cache.get(89));
          assertEquals(94, cache.get(94));
          assertEquals(94, cache.get(94, () -> 100));
          Object removed = cache.remove(98);
          assertEquals(98, removed);
          assertEquals(9, cache.getSize());
          cache.clear();
          assertEquals(0, cache.getSize());
      }
      
      @Test
      void testLru() {
          int capacity = 10;
          int start = 0;
          int end = 10;
          Cache cache = CacheBuilder.builder().maximumSize(capacity).lru(true).build();
          IntStream.range(start, end).forEach(item -> cache.put(item, item));
          IntStream.range(start, 2).forEach(item -> cache.get(0));
          cache.put(100, 100);
          assertEquals(start, cache.get(0));
          assertNull(cache.get(1));
      }
  }
  