11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2011 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * you may not use this file except in compliance with the License. 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * You may obtain a copy of the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * See the License for the specific language governing permissions and 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * limitations under the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.hash; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport static com.google.common.hash.Hashing.murmur3_32; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.hash.Funnels; 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.hash.HashTestUtils.HashFn; 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport junit.framework.TestCase; 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Tests for Murmur3Hash32. 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic class Murmur3Hash32Test extends TestCase { 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testParanoid() { 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert HashFn hf = new HashFn() { 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public byte[] hash(byte[] input, int seed) { 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Hasher hasher = murmur3_32(seed).newHasher(); 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Funnels.byteArrayFunnel().funnel(input, hasher); 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return hasher.hash().asBytes(); 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert }; 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // the magic number comes from: 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // http://code.google.com/p/smhasher/source/browse/trunk/main.cpp, #72 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert HashTestUtils.verifyHashFunction(hf, 32, 0xB0F57EE3); 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 43