public void FirstWriteSendsNonce()
{
var psk = new PreSharedKey().Generate();
var insecure = new MemoryStream();
var secure = new Psk1Stream(insecure, psk);
secure.WriteByte(0x10);
Assert.AreEqual(24 + 1, insecure.Length);
insecure = new MemoryStream();
secure = new Psk1Stream(insecure, psk);
secure.Write(new byte[10], 0, 10);
Assert.AreEqual(24 + 10, insecure.Length);
insecure = new MemoryStream();
secure = new Psk1Stream(insecure, psk);
secure.WriteAsync(new byte[12], 0, 12).Wait();
Assert.AreEqual(24 + 12, insecure.Length);
}