add test case for download retry

app/logical/downloads/file.rb

@@ -2,6 +2,7 @@ module Downloads
   class File
     class Error < Exception ; end
 
+    attr_reader :tries
     attr_accessor :source, :content_type, :file_path
 
     def initialize(source, file_path)
@@ -77,7 +78,6 @@ module Downloads
             end # http.request_get
           end # http.start
         rescue Errno::ECONNRESET, Errno::ETIMEDOUT, Errno::EIO, Errno::EHOSTUNREACH, Errno::ECONNREFUSED, IOError => x
-          puts x.inspect
           @tries += 1
           if @tries < 3
             retry

test/unit/downloads/file_test.rb

@@ -13,6 +13,19 @@ module Downloads
         @tempfile.close
       end
 
+      context "that fails" do
+        setup do
+          Net::HTTP.stubs(:start).raises(Errno::ETIMEDOUT)
+        end
+        
+        should "retry three times" do
+          assert_raises(Errno::ETIMEDOUT) do
+            @download.http_get_streaming {}
+          end
+          assert_equal(3, @download.tries)
+        end
+      end
+
       should "stream a file from an HTTP source" do
         @download.http_get_streaming do |resp|
           assert_equal("200", resp.code)