Fix render_parent when variants are involved

lib/view_component/base.rb

@@ -125,8 +125,18 @@ def render_in(view_context, &block)
     #
     # Calls `super`, returning `nil` to avoid rendering the result twice.
     def render_parent
-      mtd = @__vc_variant ? "call_#{@__vc_variant}" : "call"
-      method(mtd).super_method.call
+      mtd = if @__vc_variant
+        mtd_variant_name = "call_#{@__vc_variant}"
+
+        if respond_to?(mtd_variant_name)
+          super_mtd = method(mtd_variant_name).super_method
+          super_mtd ? super_mtd : nil
+        end
+      end
+
+      mtd ||= method(:call).super_method
+      mtd.call
+
       nil
     end
 

test/sandbox/app/components/render_parent_wrapper_component.html+phone.erb

@@ -0,0 +1,3 @@
+<div class="render-parent-wrapper phone">
+  <%= render(SuperComponent.new) %>
+</div>

test/sandbox/app/components/render_parent_wrapper_component.html.erb

@@ -0,0 +1,3 @@
+<div class="render-parent-wrapper">
+  <%= render(SuperComponent.new) %>
+</div>

test/sandbox/app/components/render_parent_wrapper_component.rb

@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+class RenderParentWrapperComponent < ViewComponent::Base
+end

test/sandbox/app/components/super_component.html+variant.erb

@@ -0,0 +1,3 @@
+<div class="derived-component variant">
+  <%= render_parent %>
+</div>

test/sandbox/test/rendering_test.rb

@@ -969,6 +969,22 @@ def test_inherited_component_calls_super
     end
   end
 
+  def test_inherited_component_falls_back_to_call_method_when_rendering_variant
+    with_variant :phone do
+      render_inline(RenderParentWrapperComponent.new)
+    end
+
+    assert_selector ".render-parent-wrapper.phone .derived-component .base-component"
+  end
+
+  def test_inherited_component_falls_back_to_super_call_method_when_rendering_variant
+    with_variant :variant do
+      render_inline(SuperComponent.new)
+    end
+
+    assert_selector ".derived-component.variant .base-component"
+  end
+
   def test_component_renders_without_trailing_whitespace
     template = File.read(Rails.root.join("app/components/trailing_whitespace_component.html.erb"))
     assert template =~ /\s+\z/, "Template does not contain any trailing whitespace"