| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 org.apache.hadoop.hbase.io; |
| |
| import static org.junit.Assert.*; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| @Category(SmallTests.class) |
| public class TestByteBufferOutputStream { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestByteBufferOutputStream.class); |
| |
| @Test |
| public void testByteBufferReuse() throws IOException { |
| byte [] someBytes = Bytes.toBytes("some bytes"); |
| ByteBuffer bb = ByteBuffer.allocate(someBytes.length); |
| ByteBuffer bbToReuse = write(bb, someBytes); |
| bbToReuse = write(bbToReuse, Bytes.toBytes("less")); |
| assertTrue(bb == bbToReuse); |
| } |
| |
| private ByteBuffer write(final ByteBuffer bb, final byte [] bytes) throws IOException { |
| try (ByteBufferOutputStream bbos = new ByteBufferOutputStream(bb)) { |
| bbos.write(bytes); |
| assertTrue(Bytes.compareTo(bytes, bbos.toByteArray(0, bytes.length)) == 0); |
| bbos.flush(); |
| return bbos.getByteBuffer(); |
| } |
| } |
| } |