| /* |
| * 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.kafka.common.utils; |
| |
| import org.junit.Test; |
| |
| import java.nio.ByteBuffer; |
| import java.util.zip.Checksum; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| public class ChecksumsTest { |
| |
| @Test |
| public void testUpdateByteBuffer() { |
| byte[] bytes = new byte[]{0, 1, 2, 3, 4, 5}; |
| doTestUpdateByteBuffer(bytes, ByteBuffer.allocate(bytes.length)); |
| doTestUpdateByteBuffer(bytes, ByteBuffer.allocateDirect(bytes.length)); |
| } |
| |
| private void doTestUpdateByteBuffer(byte[] bytes, ByteBuffer buffer) { |
| buffer.put(bytes); |
| buffer.flip(); |
| Checksum bufferCrc = new Crc32(); |
| Checksums.update(bufferCrc, buffer, buffer.remaining()); |
| assertEquals(Crc32.crc32(bytes), bufferCrc.getValue()); |
| assertEquals(0, buffer.position()); |
| } |
| |
| @Test |
| public void testUpdateByteBufferWithOffsetPosition() { |
| byte[] bytes = new byte[]{-2, -1, 0, 1, 2, 3, 4, 5}; |
| doTestUpdateByteBufferWithOffsetPosition(bytes, ByteBuffer.allocate(bytes.length), 2); |
| doTestUpdateByteBufferWithOffsetPosition(bytes, ByteBuffer.allocateDirect(bytes.length), 2); |
| } |
| |
| @Test |
| public void testUpdateInt() { |
| final int value = 1000; |
| final ByteBuffer buffer = ByteBuffer.allocate(4); |
| buffer.putInt(value); |
| |
| Checksum crc1 = Crc32C.create(); |
| Checksum crc2 = Crc32C.create(); |
| |
| Checksums.updateInt(crc1, value); |
| crc2.update(buffer.array(), buffer.arrayOffset(), 4); |
| |
| assertEquals("Crc values should be the same", crc1.getValue(), crc2.getValue()); |
| } |
| |
| @Test |
| public void testUpdateLong() { |
| final long value = Integer.MAX_VALUE + 1; |
| final ByteBuffer buffer = ByteBuffer.allocate(8); |
| buffer.putLong(value); |
| |
| Checksum crc1 = new Crc32(); |
| Checksum crc2 = new Crc32(); |
| |
| Checksums.updateLong(crc1, value); |
| crc2.update(buffer.array(), buffer.arrayOffset(), 8); |
| |
| assertEquals("Crc values should be the same", crc1.getValue(), crc2.getValue()); |
| } |
| |
| private void doTestUpdateByteBufferWithOffsetPosition(byte[] bytes, ByteBuffer buffer, int offset) { |
| buffer.put(bytes); |
| buffer.flip(); |
| buffer.position(offset); |
| |
| Checksum bufferCrc = Crc32C.create(); |
| Checksums.update(bufferCrc, buffer, buffer.remaining()); |
| assertEquals(Crc32C.compute(bytes, offset, buffer.remaining()), bufferCrc.getValue()); |
| assertEquals(offset, buffer.position()); |
| } |
| |
| } |