Finish tests for different hands

src/hand.rs

@@ -22,11 +22,11 @@ struct PokerHand {
 impl fmt::Display for PokerHand {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let s = match self.hand_type() {
-            HandType::HighCard => write!(f, "{}", self.cards[4]),
+            HandType::HighCard => write!(f, "{}", self.card_str()),
             HandType::OnePair => {
                 for val in self.hash_map() {
                     if val.1 == 2 {
-                        return write!(f, "Pair of {:?}'s", val);
+                        return write!(f, "{} | Pair of {:?}'s", self.card_str(), val);
                     }
                 }
                 return write!(f, "???");
@@ -51,6 +51,16 @@ impl PokerHand {
         PokerHand { cards }
     }
 
+    fn card_str(&self) -> String {
+        let mut cardstr: String = "".to_owned();
+        for card in &self.cards {
+            cardstr.push_str(&card.to_string());
+            cardstr.push(' ');
+        }
+
+        cardstr
+    }
+
     fn hash_map(&self) -> HashMap<CardValue, u8> {
         let mut count: HashMap<CardValue, u8> = HashMap::new();
 
@@ -150,25 +160,68 @@ fn is_four_of_a_kind(hand: &PokerHand) -> bool {
 }
 
 fn is_full_house(hand: &PokerHand) -> bool {
-    false
+    let map = hand.hash_map();
+    if map.len() != 2 {
+        return false;
+    }
+
+    let count: Vec<u8> = map.into_values().collect();
+
+    // https://stackoverflow.com/questions/45353757/how-to-count-the-elements-in-a-vector-with-some-value-without-looping
+    if count.iter().filter(|&n| *n == 2).count() != 1 {
+        return false;
+    }
+
+    if count.iter().filter(|&n| *n == 2).count() != 1 {
+        return false;
+    }
+
+    true
 }
 
 fn is_flush(hand: &PokerHand) -> bool {
-    false
+    let suit = hand.cards[0].suit;
+    for card in &hand.cards {
+        if card.suit != suit {
+            return false;
+        }
+    }
+
+    true
 }
 
+/// This function relies on the fact that the vector of cards is sotred
 fn is_straight(hand: &PokerHand) -> bool {
-    false
+    let lowest_val = hand.cards[0].value;
+
+    for i in 1..4 {
+        if (hand.cards[i].value >= lowest_val) {
+            return false;
+        }
+    }
+
+    true
 }
 
 fn is_three_of_a_kind(hand: &PokerHand) -> bool {
-    false
+    let map = hand.hash_map();
+    let count: Vec<u8> = map.into_values().collect();
+
+    count.contains(&3)
 }
 
 fn is_two_pair(hand: &PokerHand) -> bool {
-    false
+    let map = hand.hash_map();
+    let count: Vec<u8> = map.into_values().collect();
+
+    // https://stackoverflow.com/questions/45353757/how-to-count-the-elements-in-a-vector-with-some-value-without-looping
+    count.iter().filter(|&n| *n == 2).count() == 2
 }
 
 fn is_one_pair(hand: &PokerHand) -> bool {
-    false
+    let map = hand.hash_map();
+    let count: Vec<u8> = map.into_values().collect();
+
+    // https://stackoverflow.com/questions/45353757/how-to-count-the-elements-in-a-vector-with-some-value-without-looping
+    count.iter().filter(|&n| *n == 2).count() == 1
 }