fix tests

test/attachment_adapter_test.rb

@@ -5,6 +5,8 @@ class AttachmentAdapterTest < Test::Unit::TestCase
     rebuild_model :path => "tmp/:class/:attachment/:style/:filename"
     @attachment = Dummy.new.avatar
     @file = File.new(fixture_file("5k.png"))
+    @file.binmode
+
     @attachment.assign(@file)
     @attachment.save
     @subject = Paperclip.io_adapters.for(@attachment)

test/file_adapter_test.rb

@@ -4,6 +4,7 @@ class FileAdapterTest < Test::Unit::TestCase
   context "a new instance" do
     setup do
       @file = File.new(fixture_file("5k.png"))
+      @file.binmode
       @subject = Paperclip.io_adapters.for(@file)
     end
 

test/uploaded_file_adapter_test.rb

@@ -5,11 +5,14 @@ class UploadedFileAdapterTest < Test::Unit::TestCase
     context "with UploadedFile responding to #tempfile" do
       setup do
         class UploadedFile < OpenStruct; end
+        tempfile = File.new(fixture_file("5k.png"))
+        tempfile.binmode
+
         @file = UploadedFile.new(
           :original_filename => "5k.png",
           :content_type => "image/png",
           :head => "",
-          :tempfile => File.new(fixture_file("5k.png"))
+          :tempfile => tempfile
         )
         @subject = Paperclip.io_adapters.for(@file)
       end
@@ -76,7 +79,9 @@ class UploadedFileAdapterTest < Test::Unit::TestCase
       end
 
       should "read the contents of the file" do
-        expected = File.new(@file.path).read
+        expected_file = File.new(@file.path)
+        expected_file.binmode
+        expected = expected_file.read
         assert expected.length > 0
         assert_equal expected, @subject.read
       end