/*
* Copyright 2013 The Netty Project
*
* The Netty Project 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 io.netty.handler.codec.frame;
import io.netty.buffer.ByteBuf;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.handler.codec.EncoderException;
import io.netty.handler.codec.LengthFieldPrepender;
import io.netty.util.CharsetUtil;
import org.junit.Before;
import org.junit.Test;
import static io.netty.buffer.Unpooled.*;
import static org.junit.Assert.*;
public class LengthFieldPrependerTest {
private ByteBuf msg;
@Before
public void setUp() throws Exception {
msg = copiedBuffer("A", CharsetUtil.ISO_8859_1);
}
@Test
public void testPrependLength() throws Exception {
final EmbeddedChannel ch = new EmbeddedChannel(new LengthFieldPrepender(4));
ch.writeOutbound(msg);
ByteBuf buf = ch.readOutbound();
assertEquals(4, buf.readableBytes());
assertEquals(msg.readableBytes(), buf.readInt());
buf.release();
buf = ch.readOutbound();
assertSame(buf, msg);
buf.release();
}
@Test
public void testPrependLengthIncludesLengthFieldLength() throws Exception {
final EmbeddedChannel ch = new EmbeddedChannel(new LengthFieldPrepender(4, true));
ch.writeOutbound(msg);
ByteBuf buf = ch.readOutbound();
assertEquals(4, buf.readableBytes());
assertEquals(5, buf.readInt());
buf.release();
buf = ch.readOutbound();
assertSame(buf, msg);
buf.release();
}
@Test
public void testPrependAdjustedLength() throws Exception {
final EmbeddedChannel ch = new EmbeddedChannel(new LengthFieldPrepender(4, -1));
ch.writeOutbound(msg);
ByteBuf buf = ch.readOutbound();
assertEquals(4, buf.readableBytes());
assertEquals(msg.readableBytes() - 1, buf.readInt());
buf.release();
buf = ch.readOutbound();
assertSame(buf, msg);
buf.release();
}
@Test
public void testAdjustedLengthLessThanZero() throws Exception {
final EmbeddedChannel ch = new EmbeddedChannel(new LengthFieldPrepender(4, -2));
try {
ch.writeOutbound(msg);
fail(EncoderException.class.getSimpleName() + " must be raised.");
} catch (EncoderException e) {
// Expected
}
}
}