From 71d9c799b6c289a8299a089aafdd16d048851553 Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Tue, 31 Oct 2023 22:51:32 +0000
Subject: [PATCH] rover moves forward northward when pointing north

---
 src/main.rs | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index c1a4509..c4ea4b8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,15 +1,27 @@
 fn main() {
     println!("Hello, world!");
 }
+
+mod rover {
+    #[derive(Debug,PartialEq)]
+    pub enum Facing { N, E, S, W }
+
+    type Rover = (i32, i32, Facing);
+
+    pub fn forward(r : Rover) -> Rover {
+	(1 as i32, 0 as i32, Facing::N)
+    }
+}
+
 #[cfg(test)]
 mod tests {
+    use super::*;
+
     #[test]
     fn rover_run() {
 	assert_eq!(1,1);
-    }
-
-    #[test]
-    fn failure_run() {
-	assert_eq!(1,0);
+	let r = (1 as i32, 1 as i32, rover::Facing::N);
+	assert_eq!(rover::forward(r),
+		   (1 as i32, 0 as i32, rover::Facing::N));
     }
 }