001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 *
019 */
020package org.apache.mina.core;
021
022import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
023import org.apache.mina.core.filterchain.IoFilter;
024import org.apache.mina.core.filterchain.IoFilterAdapter;
025import org.apache.mina.core.filterchain.IoFilterChain.Entry;
026import org.apache.mina.filter.util.NoopFilter;
027import org.junit.After;
028import org.junit.Before;
029import org.junit.Test;
030
031import static org.junit.Assert.assertEquals;
032import static org.junit.Assert.assertSame;
033
034/**
035 * Tests {@link DefaultIoFilterChainBuilder}.
036 *
037 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
038 */
039public class DefaultIoFilterChainBuilderTest {
040    @Before
041    public void setUp() throws Exception {
042        // Do nothing
043    }
044
045    @After
046    public void tearDown() throws Exception {
047        // Do nothing
048    }
049
050    @Test
051    public void testAdd() throws Exception {
052        DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
053
054        builder.addFirst("A", new NoopFilter());
055        builder.addLast("B", new NoopFilter());
056        builder.addFirst("C", new NoopFilter());
057        builder.addLast("D", new NoopFilter());
058        builder.addBefore("B", "E", new NoopFilter());
059        builder.addBefore("C", "F", new NoopFilter());
060        builder.addAfter("B", "G", new NoopFilter());
061        builder.addAfter("D", "H", new NoopFilter());
062
063        String actual = "";
064        for (Entry e : builder.getAll()) {
065            actual += e.getName();
066        }
067
068        assertEquals("FCAEBGDH", actual);
069    }
070
071    @Test
072    public void testGet() throws Exception {
073        DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
074
075        IoFilter filterA = new NoopFilter();
076        IoFilter filterB = new NoopFilter();
077        IoFilter filterC = new NoopFilter();
078        IoFilter filterD = new NoopFilter();
079
080        builder.addFirst("A", filterA);
081        builder.addLast("B", filterB);
082        builder.addBefore("B", "C", filterC);
083        builder.addAfter("A", "D", filterD);
084
085        assertSame(filterA, builder.get("A"));
086        assertSame(filterB, builder.get("B"));
087        assertSame(filterC, builder.get("C"));
088        assertSame(filterD, builder.get("D"));
089    }
090
091    @Test
092    public void testRemove() throws Exception {
093        DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
094
095        builder.addLast("A", new NoopFilter());
096        builder.addLast("B", new NoopFilter());
097        builder.addLast("C", new NoopFilter());
098        builder.addLast("D", new NoopFilter());
099        builder.addLast("E", new NoopFilter());
100
101        builder.remove("A");
102        builder.remove("E");
103        builder.remove("C");
104        builder.remove("B");
105        builder.remove("D");
106
107        assertEquals(0, builder.getAll().size());
108    }
109
110    @Test
111    public void testClear() throws Exception {
112        DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
113
114        builder.addLast("A", new NoopFilter());
115        builder.addLast("B", new NoopFilter());
116        builder.addLast("C", new NoopFilter());
117        builder.addLast("D", new NoopFilter());
118        builder.addLast("E", new NoopFilter());
119
120        builder.clear();
121
122        assertEquals(0, builder.getAll().size());
123    }
124
125    @Test
126    public void testToString() {
127        DefaultIoFilterChainBuilder builder = new DefaultIoFilterChainBuilder();
128
129        // When the chain is empty
130        assertEquals("{ empty }", builder.toString());
131
132        // When there's one filter
133        builder.addLast("A", new IoFilterAdapter() {
134            @Override
135            public String toString() {
136                return "B";
137            }
138        });
139        assertEquals("{ (A:B) }", builder.toString());
140
141        // When there are two
142        builder.addLast("C", new IoFilterAdapter() {
143            @Override
144            public String toString() {
145                return "D";
146            }
147        });
148        assertEquals("{ (A:B), (C:D) }", builder.toString());
149    }
150}