Update to ruby/spec@ccf0d85

1 files changed, 16 insertions, 1 deletions

diff --git a/spec/ruby/core/string/reverse_spec.rb b/spec/ruby/core/string/reverse_spec.rb
index cf4956a528..b45ff2cf6f 100644
--- a/spec/ruby/core/string/reverse_spec.rb
+++ b/spec/ruby/core/string/reverse_spec.rb
@@ -10,6 +10,22 @@ describe "String#reverse" do
     "".reverse.should == ""
   end
 
+  ruby_version_is '3.0' do
+    it "returns String instances when called on a subclass" do
+      StringSpecs::MyString.new("stressed").reverse.should be_an_instance_of(String)
+      StringSpecs::MyString.new("m").reverse.should be_an_instance_of(String)
+      StringSpecs::MyString.new("").reverse.should be_an_instance_of(String)
+    end
+  end
+
+  ruby_version_is ''...'3.0' do
+    it "returns subclass instances when called on a subclass" do
+      StringSpecs::MyString.new("stressed").reverse.should be_an_instance_of(StringSpecs::MyString)
+      StringSpecs::MyString.new("m").reverse.should be_an_instance_of(StringSpecs::MyString)
+      StringSpecs::MyString.new("").reverse.should be_an_instance_of(StringSpecs::MyString)
+    end
+  end
+
   ruby_version_is ''...'2.7' do
     it "taints the result if self is tainted" do
       "".taint.reverse.should.tainted?
@@ -20,7 +36,6 @@ describe "String#reverse" do
   it "reverses a string with multi byte characters" do
     "微軟正黑體".reverse.should == "體黑正軟微"
   end
-
 end
 
 describe "String#reverse!" do