Parse nested locales in AssetFields

Fixes #63

lib/contentful/resource/asset_fields.rb

@@ -12,14 +12,27 @@ module AssetFields
         file: File
       }
 
-      def fields
-        @fields[locale]
+      # Returns all fields of the asset
+      def fields(wanted_locale = default_locale)
+        @fields[locale || wanted_locale]
       end
 
       def initialize(object, *)
         super
         @fields = {}
-        @fields[locale] = extract_from_object object['fields'], :fields
+
+        if nested_locale_fields?
+          object['fields'].each do |field_name, nested_child_object|
+            nested_child_object.each do |object_locale, real_child_object|
+              @fields[object_locale] ||= {}
+              @fields[object_locale].merge! extract_from_object(
+                { field_name => real_child_object }, :fields
+              )
+            end
+          end
+        else
+          @fields[locale] = extract_from_object object['fields'], :fields
+        end
       end
 
       def inspect(info = nil)

spec/sync_spec.rb

@@ -81,4 +81,20 @@
       }}
     end
   end
+
+  describe 'Resource parsing' do
+    it 'will correctly parse the `file` field of an asset' do
+      sync = create_client.sync(initial: true)
+      vcr('sync_page') {
+        asset = sync.first_page.items.select { |item| item.is_a?(Contentful::Asset) }.first
+
+        expect(asset.file.properties[:fileName]).to eq 'doge.jpg'
+        expect(asset.file.properties[:contentType]).to eq 'image/jpeg'
+        expect(asset.file.properties[:details]['image']['width']).to eq 5800
+        expect(asset.file.properties[:details]['image']['height']).to eq 4350
+        expect(asset.file.properties[:details]['size']).to eq 522943
+        expect(asset.file.properties[:url]).to eq '//images.contentful.com/cfexampleapi/1x0xpXu4pSGS4OukSyWGUK/cc1239c6385428ef26f4180190532818/doge.jpg'
+      }
+    end
+  end
 end