[rubygems/rubygems] Bump rubies in CI to 3.3.5

A spec needed changes because now loading the default `json` prints a
warning about `ostruct` getting loaded although it will be removed in
the future. Use a different default gem to test this.

https://github.com/rubygems/rubygems/commit/7415a66906

Co-authored-by: Samuel Giddins <segiddins@segiddins.me>

1 files changed, 6 insertions, 5 deletions

diff --git a/spec/bundler/runtime/setup_spec.rb b/spec/bundler/runtime/setup_spec.rb
index ededaab410..175e2551f1 100644
--- a/spec/bundler/runtime/setup_spec.rb
+++ b/spec/bundler/runtime/setup_spec.rb
@@ -1377,20 +1377,21 @@ end
     end
 
     it "activates default gems when they are part of the bundle, but not installed explicitly", :ruby_repo do
-      default_json_version = ruby "gem 'json'; require 'json'; puts JSON::VERSION"
+      default_delegate_version = ruby "gem 'delegate'; require 'delegate'; puts Delegator::VERSION"
 
       build_repo2 do
-        build_gem "json", default_json_version
+        build_gem "delegate", default_delegate_version
       end
 
-      gemfile "source \"https://gem.repo2\"; gem 'json'"
+      gemfile "source \"https://gem.repo2\"; gem 'delegate'"
 
       ruby <<-RUBY
         require "bundler/setup"
-        require "json"
-        puts defined?(::JSON) ? "JSON defined" : "JSON undefined"
+        require "delegate"
+        puts defined?(::Delegator) ? "Delegator defined" : "Delegator undefined"
       RUBY
 
+      expect(out).to eq("Delegator defined")
       expect(err).to be_empty
     end