chore(04/2015): init day

Author: manhunto

readme.md

@@ -90,6 +90,7 @@
 | [Day 1: Not Quite Lisp](src/solutions/year2015/day01.rs)                         |   ⭐⭐   |            0.013 |            0.001 |
 | [Day 2: I Was Told There Would Be No Math](src/solutions/year2015/day02.rs)      |   ⭐⭐   |            0.074 |            0.105 |
 | [Day 3: Perfectly Spherical Houses in a Vacuum](src/solutions/year2015/day03.rs) |   ⭐⭐   |            0.358 |            0.373 |
+| [Day 4: The Ideal Stocking Stuffer](src/solutions/year2015/day04.rs)             |        |                - |                - |
 
 # TODO
 

src/solutions/mod.rs

@@ -88,6 +88,7 @@ pub fn solution(puzzle_day: PuzzleDay) -> Box<dyn Solution> {
             1 => Box::new(year2015::day01::Day01),
             2 => Box::new(year2015::day02::Day02),
             3 => Box::new(year2015::day03::Day03),
+            4 => Box::new(year2015::day04::Day04),
             _ => panic!("Day not exist"),
         },
     }

src/solutions/year2015/day04.rs

@@ -0,0 +1,23 @@
+use crate::solutions::Solution;
+
+pub struct Day04;
+
+impl Solution for Day04 {
+    fn part_one(&self, _input: &str) -> String {
+        String::from("0")
+    }
+
+    fn part_two(&self, _input: &str) -> String {
+        String::from("0")
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn part_one_example_test() {
+        assert_eq!("0", Day04.part_one(""));
+    }
+}

src/solutions/year2015/mod.rs

@@ -1,3 +1,4 @@
 pub mod day01;
 pub mod day02;
 pub mod day03;
+pub mod day04;