Add rake task to retrieve a list of available factories

core/lib/tasks/factories.rake

@@ -0,0 +1,27 @@
+namespace :factories do
+  desc "List all factories"
+  task list: :environment do
+    # TODO: search in all the common factories.rb paths in the various solidus gems
+    # Tested with solidus + solidus_stripe
+    Gem.loaded_specs.values.each do |spec|
+      factory_file = File.join(spec.full_gem_path, "lib/#{spec.name}/testing_support/factories.rb")
+      require factory_file if File.file?(factory_file)
+    end
+
+    factories = FactoryBot.factories.sort_by { |f| f.build_class.to_s }
+
+    # Find the length of the longest factory name and class name
+    longest_name_length = factories.map { |f| f.name.length }.max
+    longest_class_length = factories.map { |f| f.build_class.to_s.length }.max
+
+    puts "Factory Name".ljust(longest_name_length) + " | " + "Class Name".ljust(longest_class_length)
+    puts "-" * longest_name_length + " | " + "-" * longest_class_length
+
+    factories.each do |factory|
+      factory_name = factory.name.to_s.ljust(longest_name_length)
+      factory_class = factory.build_class.to_s.ljust(longest_class_length)
+
+      puts "#{factory_name} | #{factory_class}"
+    end
+  end
+end