Add tests

hand.go

@@ -182,4 +182,41 @@ func (h *Hand) Compare(other *Hand) int {
 	}
 
 	return 0
-}
+}
+
+// FindBestHand finds the best 5-card hand from 7 given cards.
+func FindBestHand(sevenCards []Card) (*Hand, error) {
+	if len(sevenCards) != 7 {
+		return nil, fmt.Errorf("expected 7 cards, got %d", len(sevenCards))
+	}
+
+	var bestHand *Hand
+
+	// Generate all combinations of 5 cards from 7
+	for i := 0; i < 7; i++ {
+		for j := i + 1; j < 7; j++ {
+			for k := j + 1; k < 7; k++ {
+				for l := k + 1; l < 7; l++ {
+					for m := l + 1; m < 7; m++ {
+						currentCards := []Card{
+							sevenCards[i], sevenCards[j], sevenCards[k], sevenCards[l], sevenCards[m],
+						}
+						currentHand := &Hand{Cards: currentCards}
+
+						if bestHand == nil {
+							bestHand = currentHand
+						} else {
+							// Compare currentHand with bestHand
+							// h.Compare(other) returns 1 if h wins, 2 if other wins, 0 for tie
+							if currentHand.Compare(bestHand) == 1 {
+								bestHand = currentHand
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return bestHand, nil
+}