Use __send__ instead of send

lib/rspec/core/output_wrapper.rb

@@ -15,13 +15,13 @@ def respond_to?(name, priv=false)
       end
 
       def method_missing(name, *args, &block)
-        output.send(name, *args, &block)
+        output.__send__(name, *args, &block)
       end
 
       # Redirect calls for IO interface methods
       IO.instance_methods(false).each do |method|
         define_method(method) do |*args, &block|
-          output.send(method, *args, &block)
+          output.__send__(method, *args, &block)
         end
       end
     end

spec/rspec/core/output_wrapper_spec.rb

@@ -1,3 +1,5 @@
+require 'socket'
+
 module RSpec::Core
   RSpec.describe OutputWrapper do
     let(:output) { StringIO.new }
@@ -9,6 +11,23 @@ module RSpec::Core
       expect(output.string).to eq("message\nanother message").and eq(wrapper.string)
     end
 
+    describe 'output method proxy' do
+      let(:output) {UNIXSocket.pair.first}
+      let(:wrapper) {OutputWrapper.new(output)}
+
+      it "proxies IO methods to output" do
+        expect(output).to receive(:puts).with("message")
+        wrapper.puts('message')
+      end
+
+      it "proxies unknown methods to output" do
+        expect(output).to receive(:addr).with(no_args)
+        wrapper.addr
+      end
+
+    end
+
+
     describe '#output=' do
       let(:another_output) { StringIO.new }