1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.mina.handler.chain;
21
22 import org.apache.mina.core.session.DummySession;
23 import org.apache.mina.core.session.IoSession;
24 import org.junit.Test;
25 import static org.junit.Assert.assertEquals;
26
27 /**
28 * A test case for {@link ChainedIoHandler}.
29 *
30 * @author The Apache MINA Project (dev@mina.apache.org)
31 * @version $Rev: 713100 $, $Date: 2008-11-11 19:39:46 +0100 (Tue, 11 Nov 2008) $
32 */
33 public class ChainedIoHandlerTest {
34 @Test
35 public void testChainedCommand() throws Exception {
36 IoHandlerChain chain = new IoHandlerChain();
37 StringBuilder buf = new StringBuilder();
38 chain.addLast("A", new TestCommand(buf, 'A'));
39 chain.addLast("B", new TestCommand(buf, 'B'));
40 chain.addLast("C", new TestCommand(buf, 'C'));
41
42 new ChainedIoHandler(chain).messageReceived(new DummySession(), null);
43
44 assertEquals("ABC", buf.toString());
45 }
46
47 private class TestCommand implements IoHandlerCommand {
48 private final StringBuilder buf;
49
50 private final char ch;
51
52 private TestCommand(StringBuilder buf, char ch) {
53 this.buf = buf;
54 this.ch = ch;
55 }
56
57 public void execute(NextCommand next, IoSession session, Object message)
58 throws Exception {
59 buf.append(ch);
60 next.execute(session, message);
61 }
62 }
63 }