bans: add test for logging in with expired ban.

test/functional/sessions_controller_test.rb

@@ -21,6 +21,21 @@ class SessionsControllerTest < ActionController::TestCase
         assert_equal(@user.id, session[:user_id])
         assert_not_nil(@user.last_ip_addr)
       end
+
+      should "unban user if user has expired ban" do
+        CurrentUser.scoped(@user, "127.0.0.1") do
+          @banned = FactoryGirl.create(:banned_user, ban_duration: 3)
+        end
+
+        travel_to(4.days.from_now) do
+          post :create, {name: @banned.name, password: "password"}
+          SessionLoader.new(session, {}, request, {}).load
+
+          assert_equal(@banned.id, session[:user_id])
+          assert_equal(true, @banned.ban_expired?)
+          assert_equal(false, @banned.reload.is_banned)
+        end
+      end
     end
 
     context "destroy action" do