vips_driver.rb in capybara-screenshot-diff-1.6.3

- old
+ new

@@ -67,11 +67,11 @@
           def inscribed?(dimensions, i)
             dimension(i) == dimensions || i.width < dimensions[0] || i.height < dimensions[1]
           end
 
           def crop(dimensions, i)
-            i.crop(0, 0, *dimensions)
+            i.crop(*dimensions)
           end
 
           def filter_image_with_median(image, median_filter_window_size)
             image.median(median_filter_window_size)
           end
@@ -102,11 +102,17 @@
 
           def width_for(image)
             image.width
           end
 
+          PNG_EXTENSION = ".png"
+
+          # Vips could not work with the same file. Per each process we require to create new file
           def save_image_to(image, filename)
-            image.write_to_file(filename)
+            ::Dir::Tmpname.create([filename, PNG_EXTENSION]) do |tmp_image_filename|
+              image.write_to_file(tmp_image_filename)
+              FileUtils.mv(tmp_image_filename, filename)
+            end
           end
 
           def resize_image_to(image, new_width, new_height)
             image.resize(1.* new_width / new_height)
           end