public void EmptyPasswordCheckTest()
        {
            var passwordService = new HMACSHA512PasswordService();

            Assert.Throws <ArgumentException>(() =>
            {
                passwordService.CheckPassword(null, "asfdasdfas");
            });
        }
        public void EmptyHashCheckTest()
        {
            var passwordService = new HMACSHA512PasswordService();

            Assert.Throws <ArgumentException>(() =>
            {
                passwordService.CheckPassword("test", null);
            });
        }
        public void WrongPasswordTest()
        {
            var passwordService = new HMACSHA512PasswordService();

            var password = passwordService.HashPassword("test");

            Assert.NotNull(password);

            var correct = passwordService.CheckPassword("test2", password);

            Assert.False(correct);
        }