1 files changed, 13 insertions, 2 deletions
diff --git a/actionpack/test/dispatch/uploaded_file_test.rb b/actionpack/test/dispatch/uploaded_file_test.rb
index e71c5cc629..03e5274541 100644
--- a/actionpack/test/dispatch/uploaded_file_test.rb
+++ b/actionpack/test/dispatch/uploaded_file_test.rb
@@ -2,6 +2,7 @@
 
 require "abstract_unit"
 require "tempfile"
+require "stringio"
 
 module ActionDispatch
   class UploadedFileTest < ActiveSupport::TestCase
@@ -49,10 +50,10 @@ module ActionDispatch
       assert_equal tf, uf.tempfile
     end
 
-    def test_to_io_returns_tempfile
+    def test_to_io_returns_file
       tf = Tempfile.new
       uf = Http::UploadedFile.new(tempfile: tf)
-      assert_equal tf, uf.to_io
+      assert_equal tf.to_io, uf.to_io
     end
 
     def test_delegates_path_to_tempfile
@@ -115,5 +116,15 @@ module ActionDispatch
       uf = Http::UploadedFile.new(tempfile: tf)
       assert_equal tf.to_path, uf.to_path
     end
+
+    def test_io_copy_stream
+      tf = Tempfile.new
+      tf << "thunderhorse"
+      tf.rewind
+      uf = Http::UploadedFile.new(tempfile: tf)
+      result = StringIO.new
+      IO.copy_stream(uf, result)
+      assert_equal "thunderhorse", result.string
+    end
   end
 end