| /* |
| * 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.cassandra.io.util; |
| |
| import java.io.EOFException; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| import java.util.Random; |
| |
| import com.google.common.primitives.Ints; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.utils.ByteBufferUtil; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| public class FileSegmentInputStreamTest |
| { |
| private ByteBuffer allocateBuffer(int size) |
| { |
| ByteBuffer ret = ByteBuffer.allocate(Ints.checkedCast(size)); |
| long seed = System.nanoTime(); |
| //seed = 365238103404423L; |
| System.out.println("Seed " + seed); |
| |
| new Random(seed).nextBytes(ret.array()); |
| return ret; |
| } |
| |
| @Test |
| public void testRead() throws IOException |
| { |
| testRead(0, 4096, 1024); |
| testRead(1024, 4096, 1024); |
| testRead(4096, 4096, 1024); |
| } |
| |
| private void testRead(int offset, int size, int checkInterval) throws IOException |
| { |
| final ByteBuffer buffer = allocateBuffer(size); |
| final String path = buffer.toString(); |
| |
| FileSegmentInputStream reader = new FileSegmentInputStream(buffer.duplicate(), path, offset); |
| assertEquals(path, reader.getPath()); |
| |
| for (int i = offset; i < (size + offset); i += checkInterval) |
| { |
| reader.seek(i); |
| assertFalse(reader.isEOF()); |
| assertEquals(i, reader.getFilePointer()); |
| |
| buffer.position(i - offset); |
| |
| int remaining = buffer.remaining(); |
| assertEquals(remaining, reader.bytesRemaining()); |
| byte[] expected = new byte[buffer.remaining()]; |
| buffer.get(expected); |
| assertTrue(Arrays.equals(expected, ByteBufferUtil.read(reader, remaining).array())); |
| |
| assertTrue(reader.isEOF()); |
| assertEquals(0, reader.bytesRemaining()); |
| assertEquals(buffer.capacity() + offset, reader.getFilePointer()); |
| } |
| |
| reader.close(); |
| reader.close(); |
| } |
| |
| @Test(expected = UnsupportedOperationException.class) |
| public void testMarkNotSupported() throws Exception |
| { |
| try (FileSegmentInputStream reader = new FileSegmentInputStream(allocateBuffer(1024), "", 0)) |
| { |
| assertFalse(reader.markSupported()); |
| assertEquals(0, reader.bytesPastMark(null)); |
| reader.mark(); |
| } |
| } |
| |
| @Test(expected = UnsupportedOperationException.class) |
| public void testResetNotSupported() throws Exception |
| { |
| try (FileSegmentInputStream reader = new FileSegmentInputStream(allocateBuffer(1024), "", 0)) |
| { |
| reader.reset(null); |
| } |
| } |
| |
| @Test(expected = IllegalArgumentException.class) |
| public void testSeekNegative() throws Exception |
| { |
| try (FileSegmentInputStream reader = new FileSegmentInputStream(allocateBuffer(1024), "", 0)) |
| { |
| reader.seek(-1); |
| } |
| } |
| |
| @Test(expected = IllegalArgumentException.class) |
| public void testSeekBeforeOffset() throws Exception |
| { |
| try (FileSegmentInputStream reader = new FileSegmentInputStream(allocateBuffer(1024), "", 1024)) |
| { |
| reader.seek(1023); |
| } |
| } |
| |
| @Test(expected = IllegalArgumentException.class) |
| public void testSeekPastLength() throws Exception |
| { |
| try (FileSegmentInputStream reader = new FileSegmentInputStream(allocateBuffer(1024), "", 1024)) |
| { |
| reader.seek(2049); |
| } |
| } |
| |
| @Test(expected = EOFException.class) |
| public void testReadBytesTooMany() throws Exception |
| { |
| try (FileSegmentInputStream reader = new FileSegmentInputStream(allocateBuffer(1024), "", 1024)) |
| { |
| ByteBufferUtil.read(reader, 2049); |
| } |
| } |
| } |