Merge pull request #1907 from rackspace/etag_fix

[rackspace|storage] Submit etags for file models

lib/fog/rackspace/models/storage/file.rb

@@ -227,6 +227,7 @@ module Fog
           options['Access-Control-Allow-Origin'] = access_control_allow_origin if access_control_allow_origin
           options['Origin'] = origin if origin
           options['Content-Disposition'] = content_disposition if content_disposition
+          options['Etag'] = etag if etag
           options.merge!(metadata.to_headers)
 
           data = service.put_object(directory.key, key, body, options)

tests/rackspace/models/storage/file_tests.rb

@@ -60,11 +60,6 @@ Shindo.tests('Fog::Rackspace::Storage | file', ['rackspace']) do
     directories.
     create(directory_attributes)
 
-  model_tests(@directory.files, file_attributes.merge(:etag => 'foo'), Fog.mocking?) do
-    tests('#save should not blow up with etag') do
-      @instance.save
-    end
-  end
 
   model_tests(@directory.files, file_attributes, Fog.mocking?) do
 
@@ -188,6 +183,27 @@ Shindo.tests('Fog::Rackspace::Storage | file', ['rackspace']) do
             @instance.streaming_url =~ /http:\/\/.+\.stream\..*#{@instance.key}/
           end
         end
+
+      tests('etags') do
+        text = lorem_file.read
+        md5 = Digest::MD5.new
+        md5 << text
+        etag = md5.hexdigest
+
+        begin
+          tests('valid tag').returns(true) do
+            @file = @directory.files.create :key => 'valid-etag.txt', :body => text,  :etag => etag
+            @file.reload
+            @file.etag == etag
+          end
+        ensure
+          @file.destroy if @file
+        end
+
+        tests('invalid tag').raises(Fog::Storage::Rackspace::ServiceError) do
+          @directory.files.create :key => 'invalid-etag.txt', :body => text,  :etag => "bad-bad-tag"
+        end
+      end
     end
     
       tests('#metadata keys') do