public void ExpirationParse() =>
CookieParser.FromString("username=op; Expires=Wed, 03 Jan 2018 14:54:50 GMT")
.Assert(cookie =>
cookie.Name == "username" &&
cookie.Value == "op" &&
cookie.Expires == new DateTime(2018, 01, 3, 14, 54, 50, DateTimeKind.Utc));