| /** |
| * 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.util.hash; |
| |
| import static org.junit.Assert.*; |
| import org.apache.hadoop.conf.Configuration; |
| import org.junit.Test; |
| |
| public class TestHash { |
| static final String LINE = "34563@45kjkksdf/ljfdb9d8fbusd*89uggjsk<dfgjsdfh@sddc2q3esc"; |
| |
| @Test |
| public void testHash() { |
| int iterations = 30; |
| assertTrue("testHash jenkins error !!!", |
| Hash.JENKINS_HASH == Hash.parseHashType("jenkins")); |
| assertTrue("testHash murmur error !!!", |
| Hash.MURMUR_HASH == Hash.parseHashType("murmur")); |
| assertTrue("testHash undefined", |
| Hash.INVALID_HASH == Hash.parseHashType("undefined")); |
| |
| Configuration cfg = new Configuration(); |
| cfg.set("hadoop.util.hash.type", "murmur"); |
| assertTrue("testHash", MurmurHash.getInstance() == Hash.getInstance(cfg)); |
| |
| cfg = new Configuration(); |
| cfg.set("hadoop.util.hash.type", "jenkins"); |
| assertTrue("testHash jenkins configuration error !!!", |
| JenkinsHash.getInstance() == Hash.getInstance(cfg)); |
| |
| cfg = new Configuration(); |
| assertTrue("testHash undefine configuration error !!!", |
| MurmurHash.getInstance() == Hash.getInstance(cfg)); |
| |
| assertTrue("testHash error jenkin getInstance !!!", |
| JenkinsHash.getInstance() == Hash.getInstance(Hash.JENKINS_HASH)); |
| assertTrue("testHash error murmur getInstance !!!", |
| MurmurHash.getInstance() == Hash.getInstance(Hash.MURMUR_HASH)); |
| |
| assertNull("testHash error invalid getInstance !!!", |
| Hash.getInstance(Hash.INVALID_HASH)); |
| |
| int murmurHash = Hash.getInstance(Hash.MURMUR_HASH).hash(LINE.getBytes()); |
| for (int i = 0; i < iterations; i++) { |
| assertTrue("multiple evaluation murmur hash error !!!", |
| murmurHash == Hash.getInstance(Hash.MURMUR_HASH) |
| .hash(LINE.getBytes())); |
| } |
| |
| murmurHash = Hash.getInstance(Hash.MURMUR_HASH).hash(LINE.getBytes(), 67); |
| for (int i = 0; i < iterations; i++) { |
| assertTrue( |
| "multiple evaluation murmur hash error !!!", |
| murmurHash == Hash.getInstance(Hash.MURMUR_HASH).hash( |
| LINE.getBytes(), 67)); |
| } |
| |
| int jenkinsHash = Hash.getInstance(Hash.JENKINS_HASH).hash(LINE.getBytes()); |
| for (int i = 0; i < iterations; i++) { |
| assertTrue( |
| "multiple evaluation jenkins hash error !!!", |
| jenkinsHash == Hash.getInstance(Hash.JENKINS_HASH).hash( |
| LINE.getBytes())); |
| } |
| |
| jenkinsHash = Hash.getInstance(Hash.JENKINS_HASH).hash(LINE.getBytes(), 67); |
| for (int i = 0; i < iterations; i++) { |
| assertTrue( |
| "multiple evaluation jenkins hash error !!!", |
| jenkinsHash == Hash.getInstance(Hash.JENKINS_HASH).hash( |
| LINE.getBytes(), 67)); |
| } |
| } |
| } |