test_gem_silent_ui.rb: fix leaked FDs

* lib/rubygems/user_interaction.rb (Gem::StreamUI#close): clean up
  IOs.

* test/rubygems/test_gem_silent_ui.rb (TestGemSilentUI#teardown):
  fix leaked FDs.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46942 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/user_interaction.rb

@@ -378,9 +378,13 @@ class Gem::StreamUI
   # handlers that might have been defined.
 
   def terminate_interaction(status = 0)
+    close
     raise Gem::SystemExitException, status
   end
 
+  def close
+  end
+
   ##
   # Return a progress reporter object chosen from the current verbosity.
 
@@ -683,6 +687,12 @@ class Gem::SilentUI < Gem::StreamUI
     super reader, writer, writer, false
   end
 
+  def close
+    super
+    @ins.close
+    @outs.close
+  end
+
   def download_reporter(*args) # :nodoc:
     SilentDownloadReporter.new(@outs, *args)
   end

test/rubygems/test_gem_silent_ui.rb

@@ -9,6 +9,11 @@ class TestGemSilentUI < Gem::TestCase
     @sui = Gem::SilentUI.new
   end
 
+  def teardown
+    @sui.close
+    super
+  end
+
   def test_ask
     value = nil
     out, err = capture_io do