Implementing ThreeOfAKind

src/card.rs

@@ -216,9 +216,7 @@ Any sequence of five consecutive cards all of the same suit. For instance, a han
 6. Straight
 
 Five cards in a sequence, but not all of the same suit. An example would be a hand containing a 2, 3, 4, 5, and 6, of various suits.
-7. Three of a Kind (Trips or Set)
 
-Three cards of the same rank and two unrelated cards. An example would be three Queens and two unrelated cards.
 8. Two Pair
 
 Two different pairs of cards and one unrelated card. For example, a hand with two 10s, two 9s, and an unrelated card would be "two pair."

src/match_evaluator.rs

@@ -21,6 +21,9 @@ pub enum Rank {
     /// Any five cards of the same suit, but not in sequence. For instance, if a player has five heart cards, they have a flush.
     Flush,
     Straight,
+    /// 7. Three of a Kind (Trips or Set)
+    ///
+    /// Three cards of the same rank and two unrelated cards. An example would be three Queens and two unrelated cards.
     ThreeOfAKind,
     TwoPair,
     OnePair,
@@ -42,7 +45,7 @@ impl MatchHandEvaluator {
     /// It evaluates the [Rank] of a [Hand]
     ///
     pub fn match_eval(hand: &mut Hand) -> Rank {
-        // first let's sort the hand, that's the reason we need a mutable reference
+        // first let's sort the hand, that's the reason we need here a mutable reference
         hand.sort();
 
         println!("Sorted: {}", hand);
@@ -71,6 +74,11 @@ impl MatchHandEvaluator {
             {
                 Rank::Flush
             }
+            [Card { val : v1, .. }, Card { val: v2, .. }, Card { val: v3, .. }, Card { val: v4, .. }, Card { val: v5, .. }]
+                if (v1 == v2 && v2 == v3 || v3 == v4 && v4 == v5) =>
+            {
+                Rank::ThreeOfAKind
+            }
 
             hand => Rank::HighCard(hand[0]),
         }
@@ -117,4 +125,10 @@ mod test {
         assert_rank!(hand!["Kd", "Kh", "Kc", "8s", "8d"], Rank::FullHouse);
         assert_rank!(hand!["2d", "2h", "Qc", "Qs", "Qd"], Rank::FullHouse);
     }
+
+    #[test]
+    fn rank_3_of_a_kind() {
+        assert_rank!(hand!["Kd", "Kh", "Kc", "10s", "8d"], Rank::ThreeOfAKind);
+        assert_rank!(hand!["2d", "Jh", "Qc", "Qs", "Qd"], Rank::ThreeOfAKind);
+    }
 }