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.handler.chain; 021 022import org.apache.mina.core.session.DummySession; 023import org.apache.mina.core.session.IoSession; 024import org.junit.Test; 025import static org.junit.Assert.assertEquals; 026 027/** 028 * A test case for {@link ChainedIoHandler}. 029 * 030 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 031 */ 032public class ChainedIoHandlerTest { 033 @Test 034 public void testChainedCommand() throws Exception { 035 IoHandlerChain chain = new IoHandlerChain(); 036 StringBuilder buf = new StringBuilder(); 037 chain.addLast("A", new TestCommand(buf, 'A')); 038 chain.addLast("B", new TestCommand(buf, 'B')); 039 chain.addLast("C", new TestCommand(buf, 'C')); 040 041 new ChainedIoHandler(chain).messageReceived(new DummySession(), null); 042 043 assertEquals("ABC", buf.toString()); 044 } 045 046 private class TestCommand implements IoHandlerCommand { 047 private final StringBuilder buf; 048 049 private final char ch; 050 051 public TestCommand(StringBuilder buf, char ch) { 052 this.buf = buf; 053 this.ch = ch; 054 } 055 056 public void execute(NextCommand next, IoSession session, Object message) throws Exception { 057 buf.append(ch); 058 next.execute(session, message); 059 } 060 } 061}