Port test_warn_redefined.rb to RSpec example

spec/bundler/bundled_gems_spec.rb

@@ -38,4 +38,27 @@ RSpec.describe "bundled_gems.rb" do
     expect(err).to include(/net\/smtp was loaded from (.*) from Ruby 3.1.0/)
     expect(err).to include("You can add net-smtp")
   end
+
+  it "Show warning when warn is not the standard one in the current scope" do
+    script <<-RUBY
+      module My
+        def warn(msg)
+        end
+
+        def my
+          gemfile do
+            source "https://rubygems.org"
+          end
+
+          require "ostruct"
+        end
+
+        extend self
+      end
+
+      My.my
+    RUBY
+
+    expect(err).to include(/ostruct was loaded from (.*) from Ruby 3.5.0/)
+  end
 end

tool/test_for_warn_bundled_gems/test.sh

@@ -44,10 +44,6 @@ echo "* Don't show warning bigdecimal/util when bigdecimal on Gemfile"
 ruby test_no_warn_sub_feature.rb
 echo
 
-echo "* Show warning when warn is not the standard one in the current scope"
-ruby test_warn_redefined.rb
-echo
-
 echo "* Show warning with bootsnap and some gem in Gemfile"
 ruby test_warn_bootsnap_and_gem.rb
 echo

tool/test_for_warn_bundled_gems/test_warn_redefined.rb

@@ -1,21 +0,0 @@
-require "bundler"
-Bundler::Definition.no_lock = true
-
-module My
-  def warn(msg)
-  end
-
-  def my
-    require "bundler/inline"
-
-    gemfile do
-      source "https://rubygems.org"
-    end
-
-    require "csv"
-  end
-
-  extend self
-end
-
-My.my