/*
    * ====================================================================
    * 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.http.impl.client;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  import java.net.ConnectException;
  import java.net.SocketTimeoutException;
  
  import org.apache.http.HttpResponse;
  import org.apache.http.HttpStatus;
  import org.apache.http.HttpVersion;
  import org.apache.http.client.ConnectionBackoffStrategy;
  import org.apache.http.conn.ConnectionPoolTimeoutException;
  import org.apache.http.message.BasicHttpResponse;
  import org.junit.Before;
  import org.junit.Test;
  
  
  public class TestDefaultBackoffStrategy {
  
      private DefaultBackoffStrategy impl;
  
      @Before
      public void setUp() {
          impl = new DefaultBackoffStrategy();
      }
  
      @Test
      public void isABackoffStrategy() {
          assertTrue(impl instanceof ConnectionBackoffStrategy);
      }
  
      @Test
      public void backsOffForSocketTimeouts() {
          assertTrue(impl.shouldBackoff(new SocketTimeoutException()));
      }
  
      @Test
      public void backsOffForConnectionTimeouts() {
          assertTrue(impl.shouldBackoff(new ConnectException()));
      }
  
      @Test
      public void doesNotBackOffForConnectionManagerTimeout() {
          assertFalse(impl.shouldBackoff(new ConnectionPoolTimeoutException()));
      }
  
      @Test
      public void backsOffForServiceUnavailable() {
          final HttpResponse resp = new BasicHttpResponse(HttpVersion.HTTP_1_1,
                  HttpStatus.SC_SERVICE_UNAVAILABLE, "Service Unavailable");
          assertTrue(impl.shouldBackoff(resp));
      }
  
      @Test
      public void backsOffForTooManyRequests() {
          final HttpResponse resp = new BasicHttpResponse(HttpVersion.HTTP_1_1,
                  429, "Too Many Requests");
          assertTrue(impl.shouldBackoff(resp));
      }
  
      @Test
      public void doesNotBackOffForNon429And503StatusCodes() {
          for(int i = 100; i <= 599; i++) {
              if (i== 429|| i == HttpStatus.SC_SERVICE_UNAVAILABLE) {
                  continue;
              }
              final HttpResponse resp = new BasicHttpResponse(HttpVersion.HTTP_1_1,
                      i, "Foo");
              assertFalse(impl.shouldBackoff(resp));
          }
      }
  }