/*
* Copyright 2016 Netflix, Inc.
*
* Licensed 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.reactivex.netty.util;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.buffer.UnpooledByteBufAllocator;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExternalResource;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
import java.util.ArrayList;
import java.util.List;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;
public class LineReaderTest {
@Rule
public final ReaderRule readerRule = new ReaderRule();
@Test(timeout = 60000)
public void testSingleLine() throws Exception {
String msg = "Hello";
ByteBuf data = Unpooled.buffer().writeBytes((msg + "\n").getBytes());
List<Object> out = new ArrayList<>();
readerRule.lineReader.decode(data, out, UnpooledByteBufAllocator.DEFAULT);
assertThat("Unexpected output size.", out, hasSize(1));
assertThat("Unexpected output message.", out, contains((Object) msg));
assertThat("Input buffer not consumed.", data.isReadable(), is(false));
}
@Test(timeout = 60000)
public void testEmptyInputBuffer() throws Exception {
ByteBuf data = Unpooled.buffer();
List<Object> out = new ArrayList<>();
readerRule.lineReader.decode(data, out, UnpooledByteBufAllocator.DEFAULT);
assertThat("Unexpected output size.", out, is(empty()));
assertThat("Input buffer not consumed.", data.isReadable(), is(false));
}
@Test(timeout = 60000)
public void testEmptyLine() throws Exception {
ByteBuf data = Unpooled.buffer().writeByte('\n');
List<Object> out = new ArrayList<>();
readerRule.lineReader.decode(data, out, UnpooledByteBufAllocator.DEFAULT);
assertThat("Unexpected output size.", out, hasSize(1));
assertThat("Unexpected output message.", out, contains((Object)""));
assertThat("Input buffer not consumed.", data.isReadable(), is(false));
}
@Test(timeout = 60000)
public void testSplitData() throws Exception {
String msg1 = "Hell";
String msg2 = "o";
ByteBuf data1 = Unpooled.buffer().writeBytes((msg1.getBytes()));
ByteBuf data2 = Unpooled.buffer().writeBytes((msg2 + "\n").getBytes());
List<Object> out = new ArrayList<>();
readerRule.lineReader.decode(data1, out, UnpooledByteBufAllocator.DEFAULT);
assertThat("Unexpected output size post first decode.", out, is(empty()));
assertThat("Input buffer not consumed.", data1.isReadable(), is(false));
readerRule.lineReader.decode(data2, out, UnpooledByteBufAllocator.DEFAULT);
assertThat("Unexpected output size post second decode.", out, hasSize(1));
assertThat("Unexpected output message post second decode.", out, contains((Object) (msg1 + msg2)));
assertThat("Input buffer not consumed.", data2.isReadable(), is(false));
}
@Test(timeout = 60000)
public void testUnreadDataDispose() throws Exception {
String msg = "Hell";
ByteBuf data1 = Unpooled.buffer().writeBytes((msg.getBytes()));
List<Object> out = new ArrayList<>();
readerRule.lineReader.decode(data1, out, UnpooledByteBufAllocator.DEFAULT);
assertThat("Unexpected output size post first decode.", out, is(empty()));
assertThat("Input buffer not consumed.", data1.isReadable(), is(false));
assertThat("Reader does not have incomplete buffer.", readerRule.lineReader.getIncompleteBuffer(), is(notNullValue()));
assertThat("Reader's incomplete buffer is not readable.", readerRule.lineReader.getIncompleteBuffer()
.isReadable(),
is(true));
readerRule.lineReader.dispose();
assertThat("Reader does not have incomplete buffer.", readerRule.lineReader.getIncompleteBuffer(),
is(notNullValue()));
assertThat("Reader did not release incomplete buffer.", readerRule.lineReader.getIncompleteBuffer().refCnt(),
is(0));
}
public static class ReaderRule extends ExternalResource {
private LineReader lineReader;
@Override
public Statement apply(final Statement base, Description description) {
return new Statement() {
@Override
public void evaluate() throws Throwable {
lineReader = new LineReader();
base.evaluate();
}
};
}
}
}