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* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
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* 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
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package org.elasticsearch.common.hashing;
import com.google.common.hash.HashCode;
import com.google.common.hash.Hashing;
import org.elasticsearch.common.hash.MurmurHash3;
import org.elasticsearch.test.ElasticsearchTestCase;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.LongBuffer;
public class MurmurHash3Tests extends ElasticsearchTestCase {
public void testHash128() {
final int iters = scaledRandomIntBetween(100, 5000);
for (int i = 0; i < iters; ++i) {
final int seed = randomInt();
final int offset = randomInt(20);
final int len = randomInt(randomBoolean() ? 20 : 200);
final byte[] bytes = new byte[len + offset + randomInt(3)];
getRandom().nextBytes(bytes);
HashCode h1 = Hashing.murmur3_128(seed).hashBytes(bytes, offset, len);
MurmurHash3.Hash128 h2 = MurmurHash3.hash128(bytes, offset, len, seed, new MurmurHash3.Hash128());
assertEquals(h1, h2);
}
}
private void assertEquals(HashCode h1, MurmurHash3.Hash128 h2) {
final LongBuffer longs = ByteBuffer.wrap(h1.asBytes()).order(ByteOrder.LITTLE_ENDIAN).asLongBuffer();
assertEquals(2, longs.limit());
assertEquals(h1.asLong(), h2.h1);
assertEquals(longs.get(), h2.h1);
assertEquals(longs.get(), h2.h2);
}
}