content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed 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.
   */
  package com.alibaba.csp.sentinel.transport.command.netty;
  
  import io.netty.channel.ChannelHandler;
  import io.netty.channel.ChannelPipeline;
  import io.netty.channel.socket.SocketChannel;
  import io.netty.handler.codec.http.HttpObjectAggregator;
  import io.netty.handler.codec.http.HttpRequestDecoder;
  import io.netty.handler.codec.http.HttpResponseEncoder;
  import org.junit.Test;
  import org.mockito.InOrder;
  
  import static org.mockito.Mockito.*;
  
  /**
   * Test cases for {@link HttpServerInitializer}.
   *
   * @author cdfive
   */
  public class HttpServerInitializerTest {
  
      @Test
      public void testInitChannel() throws Exception {
          // Mock Objects
          HttpServerInitializer httpServerInitializer = mock(HttpServerInitializer.class);
          SocketChannel socketChannel = mock(SocketChannel.class);
          ChannelPipeline channelPipeline = mock(ChannelPipeline.class);
  
          // Mock SocketChannel#pipeline() method
          when(socketChannel.pipeline()).thenReturn(channelPipeline);
  
          // HttpServerInitializer#initChannel(SocketChannel) call real method
          doCallRealMethod().when(httpServerInitializer).initChannel(socketChannel);
  
          // Start test for HttpServerInitializer#initChannel(SocketChannel)
          httpServerInitializer.initChannel(socketChannel);
  
          // Verify 4 times calling ChannelPipeline#addLast() method
          verify(channelPipeline, times(4)).addLast(any(ChannelHandler.class));
  
          // Verify the order of calling ChannelPipeline#addLast() method
          InOrder inOrder = inOrder(channelPipeline);
          inOrder.verify(channelPipeline).addLast(any(HttpRequestDecoder.class));
          inOrder.verify(channelPipeline).addLast(any(HttpObjectAggregator.class));
          inOrder.verify(channelPipeline).addLast(any(HttpResponseEncoder.class));
  
          inOrder.verify(channelPipeline).addLast(any(HttpServerHandler.class));
      }
  }
  