adding in solution to part one

src/main.rs

@@ -0,0 +1,89 @@
+#[derive(Debug, Copy, Clone, PartialEq)]
+enum Move {
+    Rock,
+    Paper,
+    Scissors,
+}
+
+impl Move {
+    fn from_str(s: &str) -> Move {
+        match s {
+            "A" => Move::Rock,
+            "B" => Move::Paper,
+            "C" => Move::Scissors,
+            "X" => Move::Rock,
+            "Y" => Move::Paper,
+            "Z" => Move::Scissors,
+            _ => panic!("Invalid move"),
+        }
+    }
+
+    // input what you put and what the other player put
+    fn get_score(self, other: Move) -> i32 {
+        match self {
+            Move::Rock => {
+                1 + match other {
+                    Move::Rock => 3,
+                    Move::Paper => 0,
+                    Move::Scissors => 6,
+                }
+            }
+            Move::Paper => {
+                2 + match other {
+                    Move::Rock => 6,
+                    Move::Paper => 3,
+                    Move::Scissors => 0,
+                }
+            }
+            Move::Scissors => {
+                3 + match other {
+                    Move::Rock => 0,
+                    Move::Paper => 6,
+                    Move::Scissors => 3,
+                }
+            }
+        }
+    }
+}
+
+fn main() {
+    let input = get_input();
+    let mut score = 0;
+    input.lines().for_each(|line| {
+        let opponent_move = Move::from_str(line[0..1].trim());
+        let my_move = Move::from_str(line[2..3].trim());
+        let round_score = my_move.get_score(opponent_move);
+        score += my_move.get_score(opponent_move);
+
+        println!(
+            "Opponent: {:?}, Me: {:?}, Roundscore: {:?}, Score: {:?}",
+            opponent_move, my_move, round_score, score
+        );
+    });
+
+    println!("Final score: {:?}", score);
+}
+
+fn get_input() -> String {
+    std::fs::read_to_string("input.txt").expect("Something went wrong reading the file")
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_get_score() {
+        assert_eq!(Move::Rock.get_score(Move::Rock), 4);
+        assert_eq!(Move::Rock.get_score(Move::Paper), 1);
+        assert_eq!(Move::Rock.get_score(Move::Scissors), 7);
+
+        assert_eq!(Move::Paper.get_score(Move::Rock), 8);
+        assert_eq!(Move::Paper.get_score(Move::Paper), 5);
+        assert_eq!(Move::Paper.get_score(Move::Scissors), 2);
+
+        assert_eq!(Move::Scissors.get_score(Move::Rock), 3);
+        assert_eq!(Move::Scissors.get_score(Move::Paper), 9);
+        assert_eq!(Move::Scissors.get_score(Move::Scissors), 6);
+    }
+}