public async Task ComputeHashAsync(byte[] expected, byte[] data)
{
//Arrange
var expectedV = new HashValue(expected);
var stream = new MemoryStream(data);
var hash = new XXHash64();
//Act
var result = await hash.ComputeHashAsync(stream, CancellationToken.None);
//Assert
Assert.Equal(expectedV, result);
Assert.Equal <byte>(expectedV.Value, result.Value);
}