Added test for raise_on_not_found

lib/find_by_param.rb

@@ -8,7 +8,7 @@ def define_find_param(param, options={})
         write_inheritable_attribute :find_param_options, options
         bl = lambda do |args|
           results = send("find_by_#{read_inheritable_attribute(:find_parameter)}", *args)
-          raise ActiveRecord::RecordNotFound if options[:raise_on_not_found] && (results.nil? or (results.is_a?(Array) && results.empty?))
+          raise ActiveRecord::RecordNotFound if options[:raise_on_not_found] && (results.nil? or (results.is_a?(Array) && results.size == 0))
           return results
         end
         self.class.send(:define_method, 'find_by_param', &bl)

test/find_by_param_test.rb

@@ -30,4 +30,11 @@ def test_correctly_goes_to_param
     bp = BlogPost.find(:first, :conditions => {:slug => 'adam-west'})
     assert_equal bp.to_param, 'adam-west'
   end
+
+  def test_raises_on_not_found_if_specified
+    BlogPost.send(:define_find_param, 'slug', :raise_on_not_found => true)
+    assert_raises ActiveRecord::RecordNotFound do
+      BlogPost.find_by_param('in ur tests, failing')
+    end
+  end
 end

test/test_helper.rb

@@ -28,5 +28,4 @@
 end
 
 class BlogPost < ActiveRecord::Base
-  define_find_param :slug
 end