test: Improve specs using page objects

spec/page_objects/admin/posts/edit_page.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+require_relative '../../base_page'
+
+module Admin
+  module Posts
+    class EditPage < BasePage
+      include Capybara::DSL
+    end
+  end
+end