| /* |
| * 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.solr.util; |
| |
| import org.apache.solr.SolrTestCase; |
| import org.apache.solr.update.MemOutputStream; |
| |
| import java.util.Random; |
| |
| public class TestFastOutputStream extends SolrTestCase { |
| |
| Random rand; |
| byte[] arr; |
| |
| public void testRandomWrites() throws Exception { |
| rand = random(); |
| |
| arr = new byte[20000]; |
| for (int i=0; i<arr.length; i++) { |
| arr[i] = (byte)rand.nextInt(); |
| } |
| |
| for (int i=0; i<1000; i++) { |
| doRandomWrites(); |
| } |
| |
| } |
| |
| public void doRandomWrites() throws Exception { |
| int bufSize = ( rand.nextBoolean() ? rand.nextInt(10) : rand.nextInt(20000) )+1; |
| MemOutputStream out = new MemOutputStream(new byte[bufSize]); |
| |
| int hash = 0; |
| long written = 0; |
| int iter = rand.nextInt(10)+1; |
| for (int i=0; i<iter; i++) { |
| int off = rand.nextInt(arr.length); |
| int len = off < arr.length ? rand.nextInt(arr.length - off) : 0; |
| out.write(arr, off, len); |
| hash = incHash(hash, arr, off, len); |
| written += len; |
| |
| int pos = rand.nextInt(arr.length); |
| out.write(arr[pos]); |
| hash = incHash(hash, arr, pos, 1); |
| written += 1; |
| } |
| |
| out.close(); |
| |
| int hash2 = 0; |
| for (byte[] buffer : out.buffers) { |
| hash2 = incHash(hash2, buffer, 0, buffer.length); |
| } |
| |
| assertEquals(hash, hash2); |
| assertEquals(written, out.written()); |
| assertEquals(written, out.size()); |
| } |
| |
| |
| public int incHash(int hash, byte[] arr, int off, int len) { |
| for (int i=off; i<off+len; i++) { |
| hash = hash * 31 + arr[i]; |
| } |
| return hash; |
| } |
| } |
| |