Update resource limit handling

This commit aligns snippet tag's resource
limit handling with assign tag's `assign_score_of`
method where the snippet variable acts as a pointer
to a block body - increasing assign score by one

lib/liquid/tags/render.rb

@@ -49,14 +49,14 @@ module Liquid
     def render_tag(context, output)
       template = context.evaluate(@template_name_expr)
 
-      if template.respond_to?(:to_partial)
-        partial = template.to_partial
-        template_name = template.filename
-        context_variable_name = @alias_name || template.name
-      elsif @template_name_expr.is_a?(String)
+      if @template_name_expr.is_a?(String)
         partial = PartialCache.load(template, context: context, parse_context: parse_context)
         template_name = partial.name
         context_variable_name = @alias_name || template_name.split('/').last
+      elsif template.respond_to?(:to_partial) && template.respond_to?(:name)
+        partial = template.to_partial
+        template_name = template.filename
+        context_variable_name = @alias_name || template.name
       else
         raise ::ArgumentError
       end

lib/liquid/tags/snippet.rb

@@ -28,18 +28,12 @@ module Liquid
     def render_to_output_buffer(context, output)
       snippet_drop = SnippetDrop.new(@body, @to, context.template_name)
       context.scopes.last[@to] = snippet_drop
-      context.resource_limits.increment_assign_score(assign_score_of(snippet_drop))
+      context.resource_limits.increment_assign_score(1)
       output
     end
 
     def blank?
       true
     end
-
-    private
-
-    def assign_score_of(snippet_drop)
-      snippet_drop.body.nodelist.sum { |node| node.to_s.bytesize }
-    end
   end
 end

test/integration/tags/snippet_test.rb

@@ -1081,7 +1081,7 @@ class SnippetTest < Minitest::Test
     def test_increment_assign_score_by_bytes_not_characters
       t = Template.parse("{% snippet foo %}すごい{% endsnippet %}")
       t.render!
-      assert_equal(9, t.resource_limits.assign_score)
+      assert_equal(1, t.resource_limits.assign_score)
     end
   end
 end