public void TestCreateEncryptStream()
{
var plain = Encoding.UTF8.GetBytes("Hello");
var key = new byte[32];
var iv = service.GenerateRandomBytes(CryptoService.IvSize);
Array.Fill(key, (byte)0);
var src = new MemoryStream(plain);
MemoryStream dst = new MemoryStream();
var encryption = service.CreateEncryptionStream(src, key, iv);
encryption.CopyTo(dst);
encryption.Close();
var enc = dst.ToArray();
src = new MemoryStream(enc);
dst = new MemoryStream();
var decryption = service.CreateDecryptionStream(src, key, iv);
decryption.CopyTo(dst);
decryption.Close();
var dec = dst.ToArray();
Assert.AreEqual(plain, dec);
}