From 3b3062108ab4cc879eaa64755825ad11cb6b3bb3 Mon Sep 17 00:00:00 2001
From: Eryn Wells <eryn@erynwells.me>
Date: Fri, 5 Jan 2024 18:22:12 -0800
Subject: [PATCH] [board] Implement fmt::Display on Square

Prints the square in algebraic notation
---
 board/src/square.rs | 15 ++++++++++++++-
 board/src/tests.rs  |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/board/src/square.rs b/board/src/square.rs
index 5655200..821d5de 100644
--- a/board/src/square.rs
+++ b/board/src/square.rs
@@ -1,6 +1,6 @@
 // Eryn Wells <eryn@erynwells.me>
 
-use std::str::FromStr;
+use std::{fmt, str::FromStr};
 
 pub enum Direction {
     North,
@@ -156,6 +156,12 @@ impl FromStr for Square {
     }
 }
 
+impl fmt::Display for Square {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}{}", ('a' as u8 + self.file) as char, self.rank + 1)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -263,4 +269,11 @@ mod tests {
         assert!(square63.neighbor(Direction::NorthEast).is_none());
         assert!(square63.neighbor(Direction::East).is_none());
     }
+
+    #[test]
+    fn display() {
+        assert_eq!(format!("{}", Square::c5()), "c5");
+        assert_eq!(format!("{}", Square::a1()), "a1");
+        assert_eq!(format!("{}", Square::h8()), "h8");
+    }
 }
diff --git a/board/src/tests.rs b/board/src/tests.rs
index e1018e2..1bc0085 100644
--- a/board/src/tests.rs
+++ b/board/src/tests.rs
@@ -36,4 +36,5 @@ impl Square {
     sq_constructor!(f6);
     sq_constructor!(g3);
     sq_constructor!(g5);
+    sq_constructor!(h8);
 }