Check for valid file path to prevent segfault when file does not exist.

2 files changed, 10 insertions, 4 deletions

diff --git a/lib/ruby2d/sprite.rb b/lib/ruby2d/sprite.rb
index e6a6efa..7c66f97 100644
--- a/lib/ruby2d/sprite.rb
+++ b/lib/ruby2d/sprite.rb
@@ -8,9 +8,11 @@ module Ruby2D
 
     def initialize(x, y, path, z=0)
 
-      # unless File.exists? path
-      #   raise Error, "Cannot find image file `#{path}`"
-      # end
+      unless RUBY_ENGINE == 'opal'
+        unless File.exists? path
+          raise Error, "Cannot find sprite image file `#{path}`"
+        end
+      end
 
       @x, @y, @path = x, y, path
       @clip_x, @clip_y, @clip_w, @clip_h = 0, 0, 0, 0
diff --git a/test/sprite_spec.rb b/test/sprite_spec.rb
index 441ca6e..e44ea62 100644
--- a/test/sprite_spec.rb
+++ b/test/sprite_spec.rb
@@ -3,8 +3,12 @@ require 'ruby2d'
 RSpec.describe Ruby2D::Sprite do
 
   describe '#new' do
+    it "raises exception if file doesn't exist" do
+      expect { Sprite.new(0, 0, "bad_sprite_sheet.png") }.to raise_error(Ruby2D::Error)
+    end
+
     it 'creates a new sprite' do
-      Ruby2D::Sprite.new(0, 0, "tests/media/sprite_sheet.png")
+      Sprite.new(0, 0, "test/media/sprite_sheet.png")
     end
   end