MVC planning poker- implementing cards- part 5

The use case 4 states

Use Case 4: Estimation saved
Moderator enters a round name (?) .
Participants choose a value.

The value is a card – that have a value. Wikipedia states that

<<Several commercially available decks use the sequence: 0, ½, 1, 2, 3, 5, 8, 13, 20, 40, 100, and optionally a ? (unsure) and a coffee cup (I need a break). Some organizations use standard playing cards of Ace, 2, 3, 5, 8 and king. Where king means: "this item is too big or too complicated to estimate". "Throwing a king" ends discussion of the item for the current sprint. >>

It is clear that the value ( as stated incorrectly in the use case ) is a Card – and this will be a class that have a value( decimal / double ) and there will be some cards ( unsure, coffee cup, king) that do not have value.

However, the cards must

1. be converted from and to the decimal / double value( if possible)
2. be added and converted to decimal / double

The code for the tests will be the following and it is self explanatory

[TestMethod]
        public void CoffeeCupEqualsCoffeeCup()
        {
            var c1 = Card.CoffeeCup;
            var c2 = Card.CoffeeCup;
            Assert.AreEqual(c1,c2);
        }
        
        [TestMethod]
        public void ConvertValuesEqual()
        {
            var d = 1.2m;
            var c1 = (Card)d;
            var c2 = (Card)d;
            Assert.AreEqual(c1, c2);
        }
        
        [TestMethod]
        public void ValuesEqual()
        {
            var d = 1.2m;
            var c1 = new Card(d);
            var c2 = new Card(d);
            Assert.AreEqual(c1, c2);
        }
        [TestMethod]
        public void AddingValues()
        {
            var d1 = 1.2m;
            var d2 = 1.2m;

            var c1 = new Card(d1);
            var c2 = new Card(d2);
            var c3 = Card.CoffeeCup;
            var d = (decimal) (c1 + c2+c3);
            Assert.AreEqual(d1+d2 ,d);
        }

The code is much more complicated . I am thinking where and how to share it – I want to have CI and build on Azure.