| /* |
| * 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.lucene.index; |
| |
| import java.util.Random; |
| import org.apache.lucene.util.ByteBlockPool; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.apache.lucene.util.TestUtil; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| |
| public class TestByteSliceReader extends LuceneTestCase { |
| private static byte[] RANDOM_DATA; |
| private static ByteBlockPool BLOCK_POOL; |
| private static int BLOCK_POOL_END; |
| |
| @BeforeClass |
| public static void beforeClass() { |
| int len = atLeast(100); |
| RANDOM_DATA = new byte[len]; |
| random().nextBytes(RANDOM_DATA); |
| |
| BLOCK_POOL = new ByteBlockPool(new ByteBlockPool.DirectAllocator()); |
| BLOCK_POOL.nextBuffer(); |
| byte[] buffer = BLOCK_POOL.buffer; |
| int upto = BLOCK_POOL.newSlice(ByteBlockPool.FIRST_LEVEL_SIZE); |
| for (byte randomByte : RANDOM_DATA) { |
| if ((buffer[upto] & 16) != 0) { |
| upto = BLOCK_POOL.allocSlice(buffer, upto); |
| buffer = BLOCK_POOL.buffer; |
| } |
| buffer[upto++] = randomByte; |
| } |
| BLOCK_POOL_END = upto; |
| } |
| |
| @AfterClass |
| public static void afterClass() { |
| RANDOM_DATA = null; |
| BLOCK_POOL = null; |
| } |
| |
| public void testReadByte() { |
| ByteSliceReader sliceReader = new ByteSliceReader(); |
| sliceReader.init(BLOCK_POOL, 0, BLOCK_POOL_END); |
| for (byte expected : RANDOM_DATA) { |
| assertEquals(expected, sliceReader.readByte()); |
| } |
| } |
| |
| public void testSkipBytes() { |
| Random random = random(); |
| ByteSliceReader sliceReader = new ByteSliceReader(); |
| |
| int maxSkipTo = RANDOM_DATA.length - 1; |
| int iterations = atLeast(random, 10); |
| for (int i = 0; i < iterations; i++) { |
| sliceReader.init(BLOCK_POOL, 0, BLOCK_POOL_END); |
| // skip random chunks of bytes until exhausted |
| for (int curr = 0; curr < maxSkipTo; ) { |
| int skipTo = TestUtil.nextInt(random, curr, maxSkipTo); |
| int step = skipTo - curr; |
| sliceReader.skipBytes(step); |
| assertEquals(RANDOM_DATA[skipTo], sliceReader.readByte()); |
| curr = skipTo + 1; // +1 for read byte |
| } |
| } |
| } |
| } |