1 files changed, 13 insertions, 0 deletions
diff --git a/test/ruby/test_pipe.rb b/test/ruby/test_pipe.rb
index 34f231ad8c..bcea91bebb 100644
--- a/test/ruby/test_pipe.rb
+++ b/test/ruby/test_pipe.rb
@@ -13,4 +13,17 @@ class TestPipe < Test::Unit::TestCase
       r.close
     end
   end
+  class WithConversion < self
+    def open_file(content)
+      r, w = IO.pipe
+      w << content
+      w.close
+      r.set_encoding("us-ascii:utf-8")
+      begin
+        yield r
+      ensure
+        r.close
+      end
+    end
+  end
 end