Add test and input for day3 (not passing yet)

Delete the basically empty day4 file, todo later

Cargo.lock

@@ -29,6 +29,9 @@ dependencies = [
 [[package]]
 name = "day3"
 version = "0.1.0"
+dependencies = [
+ "regex",
+]
 
 [[package]]
 name = "day4"

day3/Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+regex = "1.10.2"

day3/src/input.txt

@@ -0,0 +1,140 @@
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day3/src/main.rs

@@ -1,3 +1,7 @@
+mod part1;
+
 fn main() {
-    println!("Hello, world!");
+    let input = include_str!("input.txt");
+    println!("Part1: {}", part1::main(input));
+    println!("Part2: TODO");
 }

day3/src/part1.rs

@@ -1,4 +1,8 @@
-use regex::{Match, Regex};
+use regex::Regex;
+
+pub fn main(input: &str) -> i32 {
+    todo!();
+}
 
 #[derive(Debug)]
 enum Engine {
@@ -15,50 +19,46 @@ enum Engine {
     },
 }
 
-fn get_numbers(input: String) -> Vec<Engine> {
+fn get_numbers(index: usize, line: &str) -> Vec<Engine> {
-    todo!()
+    Regex::new(r"\d+")
-}
-
-fn get_symbols(input: String) -> Vec<Engine> {
-    todo!()
-}
-
-pub(crate) fn main() {
-    for (i, line) in test_input().split('\n').enumerate() {
-        let numbers: Vec<Engine> = Regex::new(r"\d+")
         .unwrap()
         .find_iter(line)
         .filter_map(|m| match m.as_str().parse() {
             Ok(value) => Some(Engine::Number {
                 value,
-                    line: i,
+                line: index,
                 start: m.start(),
                 end: m.end(),
             }),
             _ => None,
         })
-            .collect();
+        .collect()
-        let symbols: Vec<Engine> = line
+}
-            .chars()
+
+fn get_symbols(index: usize, line: &str) -> Vec<Engine> {
+    line.chars()
         .enumerate()
         .filter_map(|(j, m)| {
             if !m.is_ascii_digit() && m != '.' {
                 Some(Engine::Symbol {
                     value: m,
-                        line: i,
+                    line: index,
                     pos: j,
                 })
             } else {
                 None
             }
         })
-            .collect();
+        .collect()
-        println!("{:?}, {:?}", numbers, symbols)
-    }
 }
 
-pub(crate) fn test_input() -> String {
+#[cfg(test)]
-    "467..114..
+mod tests {
+    use super::*;
+
+    #[test]
+    fn example() {
+        let input = "467..114..
 ...*......
 ..35..633.
 ......#...
@@ -67,7 +67,7 @@ pub(crate) fn test_input() -> String {
 ..592.....
 ......755.
 ...$.*....
-.664.598..
+.664.598..";
-"
+        assert_eq!(main(input), 4361);
-    .to_string()
+    }
 }

day4/src/main.rs

@@ -1,3 +1,4 @@
 fn main() {
-    println!("Hello, world!");
+    println!("Part1: TODO");
+    println!("Part2: TODO");
 }

day4/src/part1.rs

@@ -1,3 +0,0 @@
-pub(crate) fn main() {
-    todo!()
-}