/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.hc.client5.http.impl.nio;
  
  import org.apache.hc.core5.http.HttpConnection;
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.pool.PoolEntry;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  
  public class H2SharingPerRoutePoolTest {
  
      static PoolEntry<String, HttpConnection> createMockEntry() {
          final PoolEntry<String, HttpConnection> poolEntry = new PoolEntry<>("some route");
          final HttpConnection conn = Mockito.mock(HttpConnection.class);
          Mockito.when(conn.isOpen()).thenReturn(true);
          poolEntry.assignConnection(conn);
          return poolEntry;
      }
  
      H2SharingConnPool.PerRoutePool<String, HttpConnection> pool;
      PoolEntry<String, HttpConnection> poolEntry1;
      PoolEntry<String, HttpConnection> poolEntry2;
  
      @BeforeEach
      void setup() {
          pool = new H2SharingConnPool.PerRoutePool<>();
          poolEntry1 = createMockEntry();
          poolEntry2 = createMockEntry();
      }
  
      @Test
      void testKeep() {
          Assertions.assertEquals(1, pool.track(poolEntry1));
          Assertions.assertEquals(2, pool.track(poolEntry1));
          Assertions.assertEquals(1, pool.track(poolEntry2));
          Assertions.assertEquals(3, pool.track(poolEntry1));
      }
  
      @Test
      void testLeaseLeastUsed() {
          pool.track(poolEntry1);
          pool.track(poolEntry1);
          pool.track(poolEntry2);
          Assertions.assertSame(poolEntry2, pool.lease());
          Assertions.assertEquals(2, pool.getCount(poolEntry2));
  
          final PoolEntry<String, HttpConnection> poolEntry = pool.lease();
          Assertions.assertEquals(3, pool.getCount(poolEntry));
      }
  
      @Test
      void testLeaseEmptyPool() {
          Assertions.assertNull(pool.lease());
      }
  
      @Test
      void testReleaseReusable() {
          pool.track(poolEntry1);
          pool.track(poolEntry1);
          pool.track(poolEntry1);
  
          Assertions.assertEquals(2, pool.release(poolEntry1, true));
          Assertions.assertEquals(1, pool.release(poolEntry1, true));
          Assertions.assertEquals(0, pool.release(poolEntry1, true));
          Assertions.assertEquals(0, pool.release(poolEntry1, true));
      }
  
      @Test
      void testReleaseNonReusable() {
          pool.track(poolEntry1);
          pool.track(poolEntry1);
          pool.track(poolEntry1);
 
         Assertions.assertEquals(0, pool.release(poolEntry1, false));
     }
 
     @Test
     void testReleaseNonPresent() {
         Assertions.assertEquals(0, pool.release(poolEntry1, true));
         Assertions.assertEquals(0, pool.release(poolEntry2, true));
     }
 
     @Test
     void testReleaseConnectionClosed() {
         pool.track(poolEntry1);
         pool.track(poolEntry1);
         pool.track(poolEntry1);
 
         Mockito.when(poolEntry1.getConnection().isOpen()).thenReturn(false);
         Assertions.assertEquals(0, pool.release(poolEntry1, true));
     }
 
     @Test
     void testReleaseConnectionMissing() {
         pool.track(poolEntry1);
         pool.track(poolEntry1);
         pool.track(poolEntry1);
 
         poolEntry1.discardConnection(CloseMode.IMMEDIATE);
         Assertions.assertEquals(0, pool.release(poolEntry1, true));
     }
 
 }