1 files changed, 30 insertions, 1 deletions
diff --git a/spec/ruby/core/proc/shared/dup.rb b/spec/ruby/core/proc/shared/dup.rb
index eda1d6929d..2821d2e00f 100644
--- a/spec/ruby/core/proc/shared/dup.rb
+++ b/spec/ruby/core/proc/shared/dup.rb
@@ -3,8 +3,37 @@ describe :proc_dup, shared: true do
     a = -> { "hello" }
     b = a.send(@method)
 
-    a.should_not equal(b)
+    a.should_not.equal?(b)
 
     a.call.should == b.call
   end
+
+  it "returns an instance of subclass" do
+    cl = Class.new(Proc)
+
+    cl.new{}.send(@method).class.should == cl
+  end
+
+  ruby_version_is "3.4" do
+    it "copies instance variables" do
+      proc = -> { "hello" }
+      proc.instance_variable_set(:@ivar, 1)
+      cl = proc.send(@method)
+      cl.instance_variables.should == [:@ivar]
+    end
+
+    it "copies the finalizer" do
+      code = <<-'RUBY'
+        obj = Proc.new { }
+
+        ObjectSpace.define_finalizer(obj, Proc.new { STDOUT.write "finalized\n" })
+
+        obj.clone
+
+        exit 0
+      RUBY
+
+      ruby_exe(code).lines.sort.should == ["finalized\n", "finalized\n"]
+    end
+  end
 end