/*
    *  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.
   *
   */
  package org.apache.mina.core;
  
  import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
  import org.apache.mina.core.filterchain.IoFilter;
  import org.apache.mina.core.filterchain.IoFilterAdapter;
  import org.apache.mina.core.filterchain.IoFilterChain.Entry;
  import org.apache.mina.filter.util.NoopFilter;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertSame;
  
  /**
   * Tests {@link DefaultIoFilterChainBuilder}.
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class DefaultIoFilterChainBuilderTest {
      @Before
      public void setUp() throws Exception {
          // Do nothing
      }
  
      @After
      public void tearDown() throws Exception {
          // Do nothing
      }
  
      @Test
      public void testAdd() throws Exception {
          DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
  
          builder.addFirst("A", new NoopFilter());
          builder.addLast("B", new NoopFilter());
          builder.addFirst("C", new NoopFilter());
          builder.addLast("D", new NoopFilter());
          builder.addBefore("B", "E", new NoopFilter());
          builder.addBefore("C", "F", new NoopFilter());
          builder.addAfter("B", "G", new NoopFilter());
          builder.addAfter("D", "H", new NoopFilter());
  
          String actual = "";
          for (Entry e : builder.getAll()) {
              actual += e.getName();
          }
  
          assertEquals("FCAEBGDH", actual);
      }
  
      @Test
      public void testGet() throws Exception {
          DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
  
          IoFilter filterA = new NoopFilter();
          IoFilter filterB = new NoopFilter();
          IoFilter filterC = new NoopFilter();
          IoFilter filterD = new NoopFilter();
  
          builder.addFirst("A", filterA);
          builder.addLast("B", filterB);
          builder.addBefore("B", "C", filterC);
          builder.addAfter("A", "D", filterD);
  
          assertSame(filterA, builder.get("A"));
          assertSame(filterB, builder.get("B"));
          assertSame(filterC, builder.get("C"));
          assertSame(filterD, builder.get("D"));
      }
  
      @Test
      public void testRemove() throws Exception {
          DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
  
          builder.addLast("A", new NoopFilter());
          builder.addLast("B", new NoopFilter());
          builder.addLast("C", new NoopFilter());
          builder.addLast("D", new NoopFilter());
          builder.addLast("E", new NoopFilter());
 
         builder.remove("A");
         builder.remove("E");
         builder.remove("C");
         builder.remove("B");
         builder.remove("D");
 
         assertEquals(0, builder.getAll().size());
     }
 
     @Test
     public void testClear() throws Exception {
         DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
 
         builder.addLast("A", new NoopFilter());
         builder.addLast("B", new NoopFilter());
         builder.addLast("C", new NoopFilter());
         builder.addLast("D", new NoopFilter());
         builder.addLast("E", new NoopFilter());
 
         builder.clear();
 
         assertEquals(0, builder.getAll().size());
     }
 
     @Test
     public void testToString() {
         DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
 
         // When the chain is empty
         assertEquals("{ empty }", builder.toString());
 
         // When there's one filter
         builder.addLast("A", new IoFilterAdapter() {
             @Override
             public String toString() {
                 return "B";
             }
         });
         assertEquals("{ (A:B) }", builder.toString());
 
         // When there are two
         builder.addLast("C", new IoFilterAdapter() {
             @Override
             public String toString() {
                 return "D";
             }
         });
         assertEquals("{ (A:B), (C:D) }", builder.toString());
     }
 }