Fix Living/Dead cells can have more than 1 char or have the same char

1 files changed, 8 insertions, 0 deletions

diff --git a/CLI/ruby/lib/game_of_life.rb b/CLI/ruby/lib/game_of_life.rb
index a2ce27a..2ff548c 100644
--- a/CLI/ruby/lib/game_of_life.rb
+++ b/CLI/ruby/lib/game_of_life.rb
@@ -43,6 +43,14 @@ module GameOfLife
           "must be between 1 and #{max_height} (current terminal height)"
       end
 
+      fail GameOfLife::Error, "Invalid --live-cell value. must be a single character" if options["live-cell"].length > 1
+
+      fail GameOfLife::Error, "Invalid --dead-cell value. must be a single character" if options["dead-cell"].length > 1
+
+      if options["dead-cell"] == options["live-cell"]
+        fail GameOfLife::Error, "Invalid --dead-cell value. must be a different character than --live-cell"
+      end
+
       {
         # Defaults the hight to less then the height of the terminal to allow banner info
         # and an extra emtpy line to avoid triggering terminal scroll while flushing