image_compare.rb in capybara-screenshot-diff-0.8.1

- old
+ new

@@ -7,16 +7,16 @@
         include ChunkyPNG::Color
 
         attr_reader :annotated_new_file_name, :annotated_old_file_name, :new_file_name,
             :old_file_name
 
-        def initialize(new_file_name, dimensions: nil, color_distance_limit: nil,
+        def initialize(new_file_name, old_file_name = nil, dimensions: nil, color_distance_limit: nil,
             area_size_limit: nil)
           @new_file_name = new_file_name
           @color_distance_limit = color_distance_limit
           @area_size_limit = area_size_limit
           @dimensions = dimensions
-          @old_file_name = "#{new_file_name}~"
+          @old_file_name = old_file_name || "#{new_file_name}~"
           @annotated_old_file_name = "#{new_file_name.chomp('.png')}_0.png~"
           @annotated_new_file_name = "#{new_file_name.chomp('.png')}_1.png~"
           reset
         end
 