private static uint Checksum(Stream file)
{
var hash = new XXH32();
var buffer = new byte[0x10000];
while (true)
{
var read = file.Read(buffer, 0, buffer.Length);
if (read == 0)
{
break;
}
hash.Update(buffer, 0, read);
}
return(hash.Digest());
}
public void EveryCallToDigestReturnsSameHash(int seed, int length)
{
var random = new Random(seed);
var bytes = new byte[length];
random.NextBytes(bytes);
var expected = XXH32.DigestOf(bytes, 0, bytes.Length);
var transform = new XXH32();
transform.Update(bytes, 0, length);
for (var i = 0; i < 100; i++)
{
Assert.Equal(expected, transform.Digest());
}
}
public void RestartableHashReturnsSameResultsAsSingleBlock(int seed, int length, int chunk)
{
var random = new Random(seed);
var bytes = new byte[length];
random.NextBytes(bytes);
var expected = XXH32.DigestOf(bytes, 0, bytes.Length);
var transform = new XXH32();
var index = 0;
while (index < length)
{
var l = Math.Min(chunk, length - index);
transform.Update(bytes, index, l);
index += l;
}
var actual = transform.Digest();
Assert.Equal(expected, actual);
}