[rubygems/rubygems] WIP: add test to run rubocop on the generated gem

Signed-off-by: Utkarsh Gupta <utkarsh@debian.org>

https://github.com/rubygems/rubygems/commit/730b770f8a

spec/bundler/commands/newgem_spec.rb

@@ -173,6 +173,18 @@ RSpec.describe "bundle gem" do
     it "generates a default .rubocop.yml" do
       expect(bundled_app("#{gem_name}/.rubocop.yml")).to exist
     end
+
+    it "run rubocop inside the generated gem with no offenses" do
+      prepare_gemspec(bundled_app("#{gem_name}", "#{gem_name}.gemspec"))
+
+      gems = ["rubocop"]
+      path = Bundler.feature_flag.default_install_uses_path? ? local_gem_path(:base => bundled_app("#{gem_name}")) : system_gem_path
+      realworld_system_gems gems, :path => path
+      bundle "install", :dir => bundled_app("#{gem_name}")
+      bundle "exec rubocop", :dir => bundled_app("#{gem_name}")
+
+      expect($?.exitstatus).to eq(0) if exitstatus
+    end
   end
 
   shared_examples_for "--no-rubocop flag" do