add name attribute to Template for more flexibility to set context's template name

lib/liquid/partial_cache.rb

@@ -16,6 +16,13 @@ module Liquid
       template = template_factory.for(template_name)
 
       partial = template.parse(source, parse_context)
+
+      partial.name ||= if context.registers[:file_system]&.respond_to?(:actual_template_name)
+        context.registers[:file_system].actual_template_name(template_name)
+      else
+        template_name
+      end
+
       cached_partials[template_name] = partial
     ensure
       parse_context.partial = false

lib/liquid/tags/include.rb

@@ -72,11 +72,7 @@ module Liquid
       old_partial       = context.partial
 
       begin
-        context.template_name = if Template.file_system.respond_to?(:actual_template_name)
-          Template.file_system.actual_template_name(template_name).delete_suffix('.liquid')
-        else
-          template_name
-        end
+        context.template_name = partial.name if partial.name
 
         context.partial = true
         context.stack do

lib/liquid/tags/render.rb

@@ -77,11 +77,7 @@ module Liquid
       render_partial_func = ->(var, forloop) {
         inner_context               = context.new_isolated_subcontext
 
-        inner_context.template_name = if Template.file_system.respond_to?(:actual_template_name)
-          Template.file_system.actual_template_name(template_name).delete_suffix('.liquid')
-        else
-          template_name
-        end
+        inner_context.template_name = partial.name if partial.name
 
         inner_context.partial       = true
         inner_context['forloop']    = forloop if forloop

lib/liquid/template.rb

@@ -15,7 +15,7 @@ module Liquid
   #   template.render('user_name' => 'bob')
   #
   class Template
-    attr_accessor :root
+    attr_accessor :root, :name
     attr_reader :resource_limits, :warnings
 
     class TagRegistry

test/integration/tags/render_tag_test.rb

@@ -268,12 +268,14 @@ class RenderTagTest < Minitest::Test
   def test_render_tag_renders_actual_template_name_for_error
     original_file_system = Liquid::Template.file_system
 
-    Liquid::Template.file_system = MemoryFileSystem.new(
+    context = Liquid::Context.new('errors' => ErrorDrop.new)
+
+    context.registers[:file_system] = MemoryFileSystem.new(
       '/some/path/snippets/foo.liquid' => "{{ foo.standard_error }}",
     )
 
     template = Liquid::Template.parse("{% render 'foo' with errors %}", line_numbers: true)
-    assert_equal('Liquid error (/some/path/snippets/foo line 1): standard error', template.render('errors' => ErrorDrop.new))
+    assert_equal('Liquid error (/some/path/snippets/foo line 1): standard error', template.render(context))
   ensure
     Liquid::Template.file_system = original_file_system
   end

test/test_helper.rb

@@ -233,6 +233,6 @@ class MemoryFileSystem
   end
 
   def actual_template_name(template_name)
-    @snippets[template_name][:actual_template_name]
+    @snippets[template_name][:actual_template_name].delete_suffix(".liquid")
   end
 end