Test disable_tags register

lib/liquid/tag.rb

@@ -38,8 +38,10 @@ module Liquid
       ''
     end
 
-    def disabled?(context)
+    def disabled?(context, output)
-      context.registers['disabled_tags']&.disabled?(tag_name)
+      if context.registers['disabled_tags']&.disabled?(tag_name)
+        output << disabled_response
+      end
     end
 
     def disabled_response

lib/liquid/tags/include.rb

@@ -45,7 +45,7 @@ module Liquid
     end
 
     def render_to_output_buffer(context, output)
-      return output << disabled_response if disabled?(context)
+      disabled?(context, output) && return
       template_name = context.evaluate(@template_name_expr)
       raise ArgumentError, options[:locale].t("errors.argument.include") unless template_name
 

test/integration/tags/render_tag_test.rb

@@ -146,4 +146,23 @@ class RenderTagTest < Minitest::Test
     Liquid::Template.file_system = StubFileSystem.new('decr' => '{% decrement %}')
     assert_template_result '-1-2-1', '{% decrement %}{% decrement %}{% render "decr" %}'
   end
+
+  def test_includes_will_not_render_inside_render_tag
+    Liquid::Template.file_system = StubFileSystem.new(
+      'foo' => 'bar',
+      'test_include' => '{% include "foo" %}'
+    )
+
+    assert_template_result 'include usage has been disabled in this context.', '{% render "test_include" %}'
+  end
+
+  def test_includes_will_not_render_inside_nested_sibling_tags
+    Liquid::Template.file_system = StubFileSystem.new(
+      'foo' => 'bar',
+      'nested_render_with_sibling_include' => '{% render "test_include" %}{% include "foo" %}',
+      'test_include' => '{% include "foo" %}'
+    )
+
+    assert_template_result 'include usage has been disabled in this context.include usage has been disabled in this context.', '{% render "nested_render_with_sibling_include" %}'
+  end
 end

test/unit/registers/disabled_tags_test.rb

@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class DisabledTagsTest < Minitest::Test
+  include Liquid
+
+  def test_disables_tag_specified
+    register = DisabledTags.new
+    register.disable("foo") do
+      assert_equal true, register.disabled?("foo")
+      assert_equal false, register.disabled?("bar")
+    end
+  end
+
+  def test_disables_nested_tags
+    register = DisabledTags.new
+    register.disable("foo") do
+      register.disable("foo") do
+        assert_equal true, register.disabled?("foo")
+        assert_equal false, register.disabled?("bar")
+      end
+      register.disable("bar") do
+        assert_equal true, register.disabled?("foo")
+        assert_equal true, register.disabled?("bar")
+        register.disable("foo") do
+          assert_equal true, register.disabled?("foo")
+          assert_equal true, register.disabled?("bar")
+        end
+      end
+      assert_equal true, register.disabled?("foo")
+      assert_equal false, register.disabled?("bar")
+    end
+  end
+end