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    * Licensed to the Apache Software Foundation (ASF) under one
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    * 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,
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   * "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.
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   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
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  package org.apache.hc.client5.http.impl;
  
  import java.io.IOException;
  import java.net.ConnectException;
  import java.net.NoRouteToHostException;
  import java.net.SocketTimeoutException;
  import java.net.UnknownHostException;
  import java.time.Instant;
  import java.time.temporal.ChronoUnit;
  
  import javax.net.ssl.SSLException;
  
  import org.apache.hc.client5.http.classic.methods.HttpGet;
  import org.apache.hc.client5.http.utils.DateUtils;
  import org.apache.hc.core5.http.ConnectionClosedException;
  import org.apache.hc.core5.http.HttpHeaders;
  import org.apache.hc.core5.http.HttpResponse;
  import org.apache.hc.core5.http.message.BasicHttpResponse;
  import org.apache.hc.core5.util.TimeValue;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  class TestDefaultHttpRequestRetryStrategy {
  
      private DefaultHttpRequestRetryStrategy retryStrategy;
  
      @BeforeEach
      void setup() {
          this.retryStrategy = new DefaultHttpRequestRetryStrategy(3, TimeValue.ofMilliseconds(1234L));
      }
  
      @Test
      void testBasics() {
          final HttpResponse response1 = new BasicHttpResponse(503, "Oopsie");
          Assertions.assertTrue(this.retryStrategy.retryRequest(response1, 1, null));
          Assertions.assertTrue(this.retryStrategy.retryRequest(response1, 2, null));
          Assertions.assertTrue(this.retryStrategy.retryRequest(response1, 3, null));
          Assertions.assertFalse(this.retryStrategy.retryRequest(response1, 4, null));
          final HttpResponse response2 = new BasicHttpResponse(500, "Big Time Oopsie");
          Assertions.assertFalse(this.retryStrategy.retryRequest(response2, 1, null));
          final HttpResponse response3 = new BasicHttpResponse(429, "Oopsie");
          Assertions.assertTrue(this.retryStrategy.retryRequest(response3, 1, null));
          Assertions.assertTrue(this.retryStrategy.retryRequest(response3, 2, null));
          Assertions.assertTrue(this.retryStrategy.retryRequest(response3, 3, null));
          Assertions.assertFalse(this.retryStrategy.retryRequest(response3, 4, null));
  
          Assertions.assertEquals(TimeValue.ofMilliseconds(1234L), this.retryStrategy.getRetryInterval(response1, 1, null));
      }
  
      @Test
      void testRetryAfterHeaderAsLong() {
          final HttpResponse response = new BasicHttpResponse(503, "Oopsie");
          response.setHeader(HttpHeaders.RETRY_AFTER, "321");
  
          Assertions.assertEquals(TimeValue.ofSeconds(321L), this.retryStrategy.getRetryInterval(response, 3, null));
      }
  
      @Test
      void testRetryAfterHeaderAsDate() {
          this.retryStrategy = new DefaultHttpRequestRetryStrategy(3, TimeValue.ZERO_MILLISECONDS);
          final HttpResponse response = new BasicHttpResponse(503, "Oopsie");
          response.setHeader(HttpHeaders.RETRY_AFTER, DateUtils.formatStandardDate(Instant.now().plus(100, ChronoUnit.SECONDS)));
  
          Assertions.assertTrue(this.retryStrategy.getRetryInterval(response, 3, null).compareTo(TimeValue.ZERO_MILLISECONDS) > 0);
      }
  
      @Test
      void testRetryAfterHeaderAsPastDate() {
          final HttpResponse response = new BasicHttpResponse(503, "Oopsie");
          response.setHeader(HttpHeaders.RETRY_AFTER, DateUtils.formatStandardDate(Instant.now().minus(100, ChronoUnit.SECONDS)));
  
          Assertions.assertEquals(TimeValue.ofMilliseconds(1234L), this.retryStrategy.getRetryInterval(response, 3, null));
     }
 
     @Test
     void testInvalidRetryAfterHeader() {
         final HttpResponse response = new BasicHttpResponse(503, "Oopsie");
         response.setHeader(HttpHeaders.RETRY_AFTER, "Stuff");
 
         Assertions.assertEquals(TimeValue.ofMilliseconds(1234L), retryStrategy.getRetryInterval(response, 3, null));
     }
 
     @Test
     void noRetryOnConnectTimeout() {
         final HttpGet request = new HttpGet("/");
 
         Assertions.assertFalse(retryStrategy.retryRequest(request, new SocketTimeoutException(), 1, null));
     }
 
     @Test
     void noRetryOnConnect() {
         final HttpGet request = new HttpGet("/");
 
         Assertions.assertFalse(retryStrategy.retryRequest(request, new ConnectException(), 1, null));
     }
 
     @Test
     void noRetryOnConnectionClosed() {
         final HttpGet request = new HttpGet("/");
 
         Assertions.assertFalse(retryStrategy.retryRequest(request, new ConnectionClosedException(), 1, null));
     }
 
     @Test
     void noRetryForNoRouteToHostException() {
         final HttpGet request = new HttpGet("/");
 
         Assertions.assertFalse(retryStrategy.retryRequest(request, new NoRouteToHostException(), 1, null));
     }
 
     @Test
     void noRetryOnSSLFailure() {
         final HttpGet request = new HttpGet("/");
 
         Assertions.assertFalse(retryStrategy.retryRequest(request, new SSLException("encryption failed"), 1, null));
     }
 
     @Test
     void noRetryOnUnknownHost() {
         final HttpGet request = new HttpGet("/");
 
         Assertions.assertFalse(retryStrategy.retryRequest(request, new UnknownHostException(), 1, null));
     }
 
     @Test
     void noRetryOnAbortedRequests() {
         final HttpGet request = new HttpGet("/");
         request.cancel();
 
         Assertions.assertFalse(retryStrategy.retryRequest(request, new IOException(), 1, null));
     }
 
     @Test
     void retryOnNonAbortedRequests() {
         final HttpGet request = new HttpGet("/");
 
         Assertions.assertTrue(retryStrategy.retryRequest(request, new IOException(), 1, null));
     }
 
 }