Add render method to notification item component

spec/components/layout/notification_item_component_spec.rb

@@ -0,0 +1,15 @@
+require "rails_helper"
+
+describe Layout::NotificationItemComponent do
+  it "is not rendered for anonymous users" do
+    render_inline Layout::NotificationItemComponent.new(nil)
+
+    expect(page).not_to be_rendered
+  end
+
+  it "is rendered for identified users" do
+    render_inline Layout::NotificationItemComponent.new(create(:user))
+
+    expect(page).to be_rendered
+  end
+end