Update to ruby/spec@7f22a0b

1 files changed, 8 insertions, 0 deletions

diff --git a/spec/ruby/core/matchdata/to_s_spec.rb b/spec/ruby/core/matchdata/to_s_spec.rb
index 9e213bb342..aab0955ae1 100644
--- a/spec/ruby/core/matchdata/to_s_spec.rb
+++ b/spec/ruby/core/matchdata/to_s_spec.rb
@@ -1,7 +1,15 @@
 require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
 
 describe "MatchData#to_s" do
   it "returns the entire matched string" do
     /(.)(.)(\d+)(\d)/.match("THX1138.").to_s.should == "HX1138"
   end
+
+  ruby_version_is "3.0" do
+    it "returns an instance of String when given a String subclass" do
+      str = MatchDataSpecs::MyString.new("THX1138.")
+      /(.)(.)(\d+)(\d)/.match(str).to_s.should be_an_instance_of(String)
+    end
+  end
 end