Add test by lines for part1

day2/src/part1.rs

@@ -1,15 +1,5 @@
 use regex::{Match, Regex};
 
-pub fn main(input: &str) -> i32 {
-    let bag = Contents {
-        red: 12,
-        green: 13,
-        blue: 14,
-    };
-    let games = Games::new(input, bag);
-    games.valid_sum()
-}
-
 struct Games {
     games: Vec<Game>,
 }
@@ -125,18 +115,38 @@ impl Contents {
     }
 }
 
+pub fn main(input: &str) -> i32 {
+    let bag = Contents {
+        red: 12,
+        green: 13,
+        blue: 14,
+    };
+    let games = Games::new(input, bag);
+    games.valid_sum()
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
-
-    #[test]
-    fn example() {
-        let input = "Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
+    const BAG: Contents = Contents {
+        red: 12,
+        green: 13,
+        blue: 14,
+    };
+    const INPUT: &str = "Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
 Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
 Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
 Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
 Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green";
-        assert_eq!(main(input), 8);
+
+    #[test]
+    fn example() {
+        assert_eq!(main(INPUT), 8)
+    }
+
+    #[test]
+    fn by_line() {
+        assert_eq!(Games::new(INPUT, BAG).valid_games(), vec![1, 2, 5])
     }
 
     #[test]