update post policy spec

spec/factories/posts.rb

@@ -48,7 +48,7 @@
     content { Faker::Lorem.sentence }
 
     trait :locked do
-      locked_by { user.id }
+      association :locked_by, factory: :user, strategy: :build
       locked_at { DateTime.now }
       locked_reason { :SPAM }
     end

spec/policies/post_policy_spec.rb

@@ -21,6 +21,13 @@
     end
   end
 
+  permissions :update_lock? do
+    let(:post) { build(:post, :locked, user: owner.resource_owner) }
+
+    it('should allow admin') { should permit(admin, post) }
+    it('should not allow owner') { should_not permit(owner, post) }
+  end
+
   permissions :create? do
     it('should allow owner') { should permit(owner, post) }
     it('should not allow admin') { should_not permit(admin, post) }