Render photos individually, optimize gallery images, and prune old releases

scripts/tests/gallery_items_test.rb

@@ -0,0 +1,30 @@
+require 'liquid'
+require 'nokogiri'
+require_relative '../../_plugins/gallery_items'
+require_relative '../../_plugins/lazy_images'
+
+class GalleryRenderer
+  include GalleryItems
+  include LazyImages
+end
+
+renderer = GalleryRenderer.new
+batch = '<div id="photo-batch"></div>' +
+        '<p><img src="/img/arts/uploads/batch/00.jpg" alt="first"></p>' +
+        '<p><img src="/img/arts/uploads/batch/01.jpg" alt="second"></p>' +
+        '<span class="image-details">A &amp; B<br>Caption</span>'
+items = renderer.gallery_items(renderer.lazy_images(batch))
+raise 'Expected one item per uploaded photo' unless items.length == 2
+items.each_with_index do |item, index|
+  html = Nokogiri::HTML::DocumentFragment.parse(item)
+  raise 'Each item must contain one photo' unless html.css('img').length == 1
+  raise 'Photo order changed' unless html.at_css('img')['src'].end_with?("0#{index}.jpg")
+  raise 'Lazy loading lost' unless html.at_css('img')['loading'] == 'lazy'
+  raise 'Caption lost' unless html.at_css('.image-details').text == 'A & BCaption'
+  raise 'Anchor must occur on the first photo only' unless html.css('#photo-batch').length == (index.zero? ? 1 : 0)
+end
+single = '<p><img src="/img/arts/uploads/batch/00.jpg"></p>'
+raise 'Single photo changed' unless renderer.gallery_items(single) == [single]
+legacy = '<p><img src="/img/old.jpg"></p><p>Existing artwork content</p>'
+raise 'Legacy artwork changed' unless renderer.gallery_items(legacy) == [legacy]
+puts 'Gallery item regression checks passed'