feat(admin): Skip layout if turbo frame request

We do not want to render the whole layout if the request
is a turbo frame request. We just want to render the
component's html.

admin/app/controllers/solidus_admin/base_controller.rb

@@ -15,8 +15,19 @@ class BaseController < ApplicationController
     include SolidusAdmin::ComponentsHelper
     include SolidusAdmin::AuthenticationAdapters::Backend if defined?(Spree::Backend)
 
-    layout 'solidus_admin/application'
+    layout :set_layout
+
     helper 'solidus_admin/components'
     helper 'solidus_admin/layout'
+
+    private
+
+    def set_layout
+      if turbo_frame_request?
+        false
+      else
+        'solidus_admin/application'
+      end
+    end
   end
 end

admin/spec/controllers/solidus_admin/base_controller_spec.rb

@@ -44,4 +44,28 @@ def index
       expect(response.code).to eq "200"
     end
   end
+
+  describe "layout rendering" do
+    subject { controller.send(:set_layout) }
+
+    context "with turbo frame request" do
+      before do
+        allow_any_instance_of(described_class).to receive(:turbo_frame_request?).and_return(true)
+      end
+
+      it "does not render a layout" do
+        is_expected.to be false
+      end
+    end
+
+    context "without turbo frame request" do
+      before do
+        allow_any_instance_of(described_class).to receive(:turbo_frame_request?).and_return(false)
+      end
+
+      it "renders the default layout" do
+        is_expected.to eq "solidus_admin/application"
+      end
+    end
+  end
 end

admin/spec/spec_helper.rb

@@ -12,6 +12,7 @@
 end
 
 require 'solidus_admin'
+require 'rails-controller-testing'
 
 Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each { |f| require f }