/*
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    * 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;
  
  import org.apache.hc.client5.http.ConnectionKeepAliveStrategy;
  import org.apache.hc.client5.http.config.RequestConfig;
  import org.apache.hc.client5.http.protocol.HttpClientContext;
  import org.apache.hc.core5.http.HttpResponse;
  import org.apache.hc.core5.http.HttpStatus;
  import org.apache.hc.core5.http.message.BasicHttpResponse;
  import org.apache.hc.core5.http.protocol.BasicHttpContext;
  import org.apache.hc.core5.http.protocol.HttpContext;
  import org.apache.hc.core5.util.TimeValue;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   *  Simple tests for {@link DefaultConnectionKeepAliveStrategy}.
   */
  public class TestDefaultConnKeepAliveStrategy {
  
      @Test(expected=NullPointerException.class)
      public void testIllegalResponseArg() throws Exception {
          final HttpContext context = new BasicHttpContext(null);
          final ConnectionKeepAliveStrategy keepAliveStrat = new DefaultConnectionKeepAliveStrategy();
          keepAliveStrat.getKeepAliveDuration(null, context);
      }
  
      @Test
      public void testNoKeepAliveHeader() throws Exception {
          final HttpClientContext context = HttpClientContext.create();
          context.setRequestConfig( RequestConfig.custom()
                  .setConnectionKeepAlive(TimeValue.NEG_ONE_MILLISECOND)
                  .build());
          final HttpResponse response = new BasicHttpResponse(HttpStatus.SC_OK);
          final ConnectionKeepAliveStrategy keepAliveStrat = new DefaultConnectionKeepAliveStrategy();
          final TimeValue d = keepAliveStrat.getKeepAliveDuration(response, context);
          Assert.assertEquals(TimeValue.NEG_ONE_MILLISECOND, d);
      }
  
      @Test
      public void testEmptyKeepAliveHeader() throws Exception {
          final HttpClientContext context = HttpClientContext.create();
          context.setRequestConfig( RequestConfig.custom()
                  .setConnectionKeepAlive(TimeValue.NEG_ONE_MILLISECOND)
                  .build());
          final HttpResponse response = new BasicHttpResponse(HttpStatus.SC_OK);
          response.addHeader("Keep-Alive", "timeout, max=20");
          final ConnectionKeepAliveStrategy keepAliveStrat = new DefaultConnectionKeepAliveStrategy();
          final TimeValue d = keepAliveStrat.getKeepAliveDuration(response, context);
          Assert.assertEquals(TimeValue.NEG_ONE_MILLISECOND, d);
      }
  
      @Test
      public void testInvalidKeepAliveHeader() throws Exception {
          final HttpClientContext context = HttpClientContext.create();
          context.setRequestConfig( RequestConfig.custom()
                  .setConnectionKeepAlive(TimeValue.NEG_ONE_MILLISECOND)
                  .build());
          final HttpResponse response = new BasicHttpResponse(HttpStatus.SC_OK);
          response.addHeader("Keep-Alive", "timeout=whatever, max=20");
          final ConnectionKeepAliveStrategy keepAliveStrat = new DefaultConnectionKeepAliveStrategy();
          final TimeValue d = keepAliveStrat.getKeepAliveDuration(response, context);
          Assert.assertEquals(TimeValue.NEG_ONE_MILLISECOND, d);
      }
  
      @Test
      public void testKeepAliveHeader() throws Exception {
          final HttpClientContext context = HttpClientContext.create();
          context.setRequestConfig( RequestConfig.custom()
                  .setConnectionKeepAlive(TimeValue.NEG_ONE_MILLISECOND)
                  .build());
          final HttpResponse response = new BasicHttpResponse(HttpStatus.SC_OK);
          response.addHeader("Keep-Alive", "timeout=300, max=20");
          final ConnectionKeepAliveStrategy keepAliveStrat = new DefaultConnectionKeepAliveStrategy();
         final TimeValue d = keepAliveStrat.getKeepAliveDuration(response, context);
         Assert.assertEquals(TimeValue.ofSeconds(300), d);
     }
 
 }