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.filter.buffer;
021
022import static org.junit.Assert.assertEquals;
023
024import org.apache.mina.core.buffer.IoBuffer;
025import org.apache.mina.core.filterchain.IoFilterAdapter;
026import org.apache.mina.core.session.DummySession;
027import org.apache.mina.core.session.IoSession;
028import org.apache.mina.core.write.WriteRequest;
029import org.apache.mina.filter.logging.LoggingFilter;
030import org.junit.Test;
031import org.slf4j.Logger;
032import org.slf4j.LoggerFactory;
033
034/**
035 * Tests {@link BufferedWriteFilter}.
036 *
037 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
038 * @since MINA 2.0.0-M2
039 */
040public class BufferedWriteFilterTest {
041    static final Logger LOGGER = LoggerFactory.getLogger(BufferedWriteFilterTest.class);
042
043    @Test
044    public void testNonExpandableBuffer() throws Exception {
045        IoBuffer dest = IoBuffer.allocate(1);
046        assertEquals(false, dest.isAutoExpand());
047    }
048
049    @Test
050    public void testBasicBuffering() {
051        DummySession sess = new DummySession();
052        sess.getFilterChain().addFirst("peer", new IoFilterAdapter() {
053
054            private int counter;
055
056            @Override
057            public void filterClose(NextFilter nextFilter, IoSession session) throws Exception {
058                LOGGER.debug("Filter closed !");
059                assertEquals(3, counter);
060            }
061
062            @Override
063            public void filterWrite(NextFilter nextFilter, IoSession session, WriteRequest writeRequest)
064                    throws Exception {
065                LOGGER.debug("New buffered message written !");
066                counter++;
067                try {
068                    IoBuffer buf = (IoBuffer) writeRequest.getMessage();
069                    if (counter == 3) {
070                        assertEquals(1, buf.limit());
071                        assertEquals(0, buf.get());
072                    } else {
073                        assertEquals(10, buf.limit());
074                    }
075                } catch (Exception ex) {
076                    throw new AssertionError("Wrong message type");
077                }
078            }
079
080        });
081        sess.getFilterChain().addFirst("logger", new LoggingFilter());
082        BufferedWriteFilter bFilter = new BufferedWriteFilter(10);
083        sess.getFilterChain().addLast("buffer", bFilter);
084
085        IoBuffer data = IoBuffer.allocate(1);
086        for (byte i = 0; i < 20; i++) {
087            data.put((byte) (0x30 + i));
088            data.flip();
089            sess.write(data);
090            data.clear();
091        }
092
093        // Add one more byte to overflow the final buffer
094        data.put((byte) 0);
095        data.flip();
096        sess.write(data);
097
098        // Flush the final byte
099        bFilter.flush(sess);
100
101        sess.close(true);
102    }
103}