From 30c0f7ad8923ad1a90071234dcab7d4cc60268d4 Mon Sep 17 00:00:00 2001
From: Tom Black <blacktm@gmail.com>
Date: Sun, 4 Jun 2017 21:11:56 -0400
Subject: Test for bad event types

---
 lib/ruby2d/window.rb | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib')

diff --git a/lib/ruby2d/window.rb b/lib/ruby2d/window.rb
index 9970861..377523b 100644
--- a/lib/ruby2d/window.rb
+++ b/lib/ruby2d/window.rb
@@ -123,6 +123,9 @@ module Ruby2D
     end
 
     def on(event, &proc)
+      unless @events.has_key? event
+        raise Error, "`#{event}` is not a valid event type"
+      end
       event_id = new_event_key
       @events[event][event_id] = proc
       EventDescriptor.new(event, event_id)
-- 
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