public void Should_create_0A0B_When_All_Digital_And_Position_Wrong()
        {
            var    testSecretGenerator = new TestSecretGernerate();
            var    game   = new BullsAndCowsGame(testSecretGenerator);
            string answer = game.Guess("5678");

            Assert.Equal($"0A0B", answer);
        }
        public void Should_create_BullsAndCowsGame()
        {
            var testSecretGenerator = new TestSecretGernerate();
            var game = new BullsAndCowsGame(testSecretGenerator);

            Assert.NotNull(game);
            Assert.True(game.CanContinue);
        }
        public void Should_create_0A4B_When_Digital_Right_But_Position_Wrong(string guess)
        {
            var    testSecretGenerator = new TestSecretGernerate();
            var    game   = new BullsAndCowsGame(testSecretGenerator);
            string answer = game.Guess(guess);

            Assert.Equal($"0A4B", answer);
        }