added pool unit test

test/factories/pool.rb

@@ -2,4 +2,6 @@ Factory.define(:pool) do |f|
   f.name {Faker::Name.first_name}
   f.creator {|x| x.association(:user)}
   f.description {Faker::Lorem.sentences}
+  f.updater_id {|x| x.creator_id}
+  f.updater_ip_addr "127.0.0.1"
 end

test/factories/post.rb

@@ -11,4 +11,5 @@ Factory.define(:post) do |f|
   f.image_width 100
   f.image_height 200
   f.file_size 2000
+  f.rating "q"
 end