Fog::Storage::Local#directories#all: Don't break when :local_root folder is missing

lib/fog/local/models/storage/directories.rb

@@ -10,12 +10,17 @@ module Fog
         model Fog::Storage::Local::Directory
 
         def all
-          data = Dir.entries(service.local_root).select do |entry|
-            entry[0...1] != '.' && ::File.directory?(service.path_to(entry))
-          end.map do |entry|
-            {:key => entry}
+          if ::File.directory?(service.local_root)
+            data = Dir.entries(service.local_root).select do |entry|
+              entry[0...1] != '.' && ::File.directory?(service.path_to(entry))
+            end.map do |entry|
+              {:key => entry}
+            end
+            load(data)
+          else
+            clear
+            self
           end
-          load(data)
         end
 
         def get(key, options = {})

tests/local/models/directories_tests.rb

@@ -0,0 +1,17 @@
+Shindo.tests('Storage[:local] | directories', ["local"]) do
+
+  pending if Fog.mocking?
+
+  @options = { :local_root => "/tmp/fogtests" }
+  @collection = Fog::Storage::Local.new(@options).directories
+
+  collection_tests(@collection, {:key => "fogdirtests"}, true)
+
+  tests("#all") do
+    tests("succeeds when :local_root does not exist").succeeds do
+      FileUtils.rm_rf(@options[:local_root])
+      @collection.all
+    end
+  end
+
+end