/*
    * ====================================================================
    * 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.core5.http.impl.io;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  import javax.net.ssl.SSLSession;
  
  import org.apache.hc.core5.http.ClassicHttpRequest;
  import org.apache.hc.core5.http.io.HttpClientConnection;
  import org.apache.hc.core5.http.io.ResponseOutOfOrderStrategy;
  import org.apache.hc.core5.http.message.BasicClassicHttpRequest;
  import org.apache.hc.core5.util.Timeout;
  import org.junit.Assert;
  import org.junit.Test;
  import org.mockito.ArgumentMatchers;
  import org.mockito.Mockito;
  
  public class TestMonitoringResponseOutOfOrderStrategy {
  
      private static final ClassicHttpRequest REQUEST = new BasicClassicHttpRequest("POST", "/path");
  
      @Test
      public void testFirstByteIsNotCheckedSsl() throws IOException {
          final boolean earlyResponse = MonitoringResponseOutOfOrderStrategy.INSTANCE.isEarlyResponseDetected(
                  REQUEST,
                  connection(true, true),
                  // SSLSocket streams report zero bytes available
                  socketInputStream(0),
                  0,
                  1);
          Assert.assertFalse(earlyResponse);
      }
  
      @Test
      public void testFirstByteIsNotCheckedPlain() throws IOException {
          final boolean earlyResponse = MonitoringResponseOutOfOrderStrategy.INSTANCE.isEarlyResponseDetected(
                  REQUEST,
                  connection(true, false),
                  socketInputStream(1),
                  0,
                  1);
          Assert.assertFalse(earlyResponse);
      }
  
      @Test
      public void testWritesWithinChunkAreNotChecked() throws IOException {
          final boolean earlyResponse = MonitoringResponseOutOfOrderStrategy.INSTANCE.isEarlyResponseDetected(
                  REQUEST,
                  connection(true, true),
                  socketInputStream(0),
                  1,
                  8190);
          Assert.assertFalse(
                  "There is data available, but checks shouldn't occur until just prior to the 8192nd byte",
                  earlyResponse);
      }
  
      @Test
      public void testWritesAcrossChunksAreChecked() throws IOException {
          final boolean earlyResponse = MonitoringResponseOutOfOrderStrategy.INSTANCE.isEarlyResponseDetected(
                  REQUEST,
                  connection(true, true),
                  socketInputStream(0),
                  8191,
                  1);
          Assert.assertTrue(earlyResponse);
      }
  
      @Test
      public void testMaximumChunks() throws IOException {
          final ResponseOutOfOrderStrategy strategy = new MonitoringResponseOutOfOrderStrategy(1, 2);
          Assert.assertTrue(strategy.isEarlyResponseDetected(
                 REQUEST,
                 connection(true, true),
                 socketInputStream(0),
                 0,
                 1));
         Assert.assertTrue(strategy.isEarlyResponseDetected(
                 REQUEST,
                 connection(true, true),
                 socketInputStream(0),
                 1,
                 2));
         Assert.assertFalse(strategy.isEarlyResponseDetected(
                 REQUEST,
                 connection(true, true),
                 socketInputStream(0),
                 2,
                 3));
     }
 
     private static InputStream socketInputStream(final int available) throws IOException {
         final InputStream stream = Mockito.mock(InputStream.class);
         Mockito.when(stream.available()).thenReturn(available);
         return stream;
     }
 
     private static HttpClientConnection connection(final boolean dataAvailable, final boolean ssl) throws IOException {
         final HttpClientConnection connection = Mockito.mock(HttpClientConnection.class);
         Mockito.when(connection.isDataAvailable(ArgumentMatchers.any(Timeout.class))).thenReturn(dataAvailable);
         if (ssl) {
             Mockito.when(connection.getSSLSession()).thenReturn(Mockito.mock(SSLSession.class));
         }
         return connection;
     }
 }