Add basic test for creating a gameboard representation.

engine/src/lib.rs

@@ -61,14 +61,22 @@ impl Board {
     }
 }
 
+static COLUMN_COORDINATE_BORDER: &str = " ABCDEFGHIJKL";
+
 impl fmt::Display for Board {
     fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
 
-        // TODO: Add a A-Z and 1-12 border around the game.
         let width = self.dimensions.get_size();
-        let height= self.dimensions.get_size();
 
-        // TODO: Implement a looping setup for the checkerboard.
+        // Create the top level border.
+        let mut column_border_chars = COLUMN_COORDINATE_BORDER.chars();
+        for _ in 0..width + 1 {
+            write!(formatter, "{}", column_border_chars.next().unwrap())?;
+        }
+        write!(formatter, "\n")?;
+
+
+
 //        for {}
 //
 //        let square = match tile {
@@ -85,8 +93,14 @@ impl fmt::Display for Board {
 
 #[cfg(test)]
 mod tests {
+    use crate::Board;
+    use crate::BoardSize;
+
     #[test]
-    fn it_works() {
-        assert_eq!(2 + 2, 4);
+    fn setup_international_board() {
+
+        let expected = r#" ABCDEFGHIJ
+"#;
+        assert_eq!(Board::new(BoardSize::International).to_string(), expected);
     }
 }