public void testHashCodesM3_128_ints()
{
int seed = 123;
Random rand = new Random(seed);
HashFunction hf = Hashing.murmur3_128(seed);
for (int i = 0; i < 1000; i++)
{
int val = rand.nextInt();
byte[] data = ByteBuffer.allocate(4).putInt(val).array();
// guava stores the hashcodes in little endian order
ByteBuffer buf = ByteBuffer.allocate(16).order(ByteOrder.LITTLE_ENDIAN);
buf.put(hf.hashBytes(data).asBytes());
buf.flip();
long gl1 = buf.getLong();
long gl2 = buf.getLong(8);
long[] hc = Murmur3.hash128(data, 0, data.length, seed);
long m1 = hc[0];
long m2 = hc[1];
Assert.Equal(gl1, m1);
Assert.Equal(gl2, m2);
byte[] offsetData = new byte[data.length + 50];
Array.Copy(data, 0, offsetData, 50, data.length);
hc = Murmur3.hash128(offsetData, 50, data.length, seed);
Assert.Equal(gl1, hc[0]);
Assert.Equal(gl2, hc[1]);
}
}
public void testHashCodesM3_128_string()
{
string key = "test";
int seed = 123;
HashFunction hf = Hashing.murmur3_128(seed);
// guava stores the hashcodes in little endian order
ByteBuffer buf = ByteBuffer.allocate(16).order(ByteOrder.LITTLE_ENDIAN);
buf.put(hf.hashBytes(key.getBytes()).asBytes());
buf.flip();
long gl1 = buf.getLong();
long gl2 = buf.getLong(8);
long[] hc = Murmur3.hash128(key.getBytes(), 0, key.getBytes().length, seed);
long m1 = hc[0];
long m2 = hc[1];
Assert.Equal(gl1, m1);
Assert.Equal(gl2, m2);
key = "testkey128_testkey128";
buf = ByteBuffer.allocate(16).order(ByteOrder.LITTLE_ENDIAN);
buf.put(hf.hashBytes(key.getBytes()).asBytes());
buf.flip();
gl1 = buf.getLong();
gl2 = buf.getLong(8);
byte[] keyBytes = key.getBytes();
hc = Murmur3.hash128(keyBytes, 0, keyBytes.length, seed);
m1 = hc[0];
m2 = hc[1];
Assert.Equal(gl1, m1);
Assert.Equal(gl2, m2);
byte[] offsetKeyBytes = new byte[keyBytes.length + 35];
Arrays.fill(offsetKeyBytes, (byte)-1);
Array.Copy(keyBytes, 0, offsetKeyBytes, 35, keyBytes.length);
hc = Murmur3.hash128(offsetKeyBytes, 35, keyBytes.length, seed);
Assert.Equal(gl1, hc[0]);
Assert.Equal(gl2, hc[1]);
}