Player: Add a `#move` method to move a piece to a cell on the board

Also add `Board#update_cell` to facilitate player movement.

1 files changed, 6 insertions, 0 deletions

diff --git a/player.rb b/player.rb
index d19ee36..8146220 100644
--- a/player.rb
+++ b/player.rb
@@ -8,4 +8,10 @@ class Player
     @insignia = insignia
     @board = board
   end
+  
+  def move(coordinates)
+    raise ArgumentError if coordinates.nil?
+    
+    @board.update_cell(coordinates[0], coordinates[1], @insignia)
+  end
 end