FIX: error looking at users in admin when tl3_promotion_min_duration is set to a very high value

app/models/user.rb

@@ -947,6 +947,8 @@ class User < ActiveRecord::Base
   end
 
   def on_tl3_grace_period?
+    return true if SiteSetting.tl3_promotion_min_duration.to_i.days.ago.year < 2013
+
     UserHistory.for(self, :auto_trust_level_change)
       .where('created_at >= ?', SiteSetting.tl3_promotion_min_duration.to_i.days.ago)
       .where(previous_value: TrustLevel[2].to_s)

config/site_settings.yml

@@ -1101,6 +1101,7 @@ trust:
     default: 5
   tl3_promotion_min_duration:
     default: 14
+    max: 10000
   tl3_requires_likes_given:
     default: 30
   tl3_requires_likes_received:

spec/jobs/tl3_promotions_spec.rb

@@ -113,5 +113,18 @@ describe Jobs::Tl3Promotions do
       run_job
       expect(user.reload.trust_level).to eq(TrustLevel[3])
     end
+
+    it "doesn't demote with very high tl3_promotion_min_duration value" do
+      SiteSetting.stubs(:tl3_promotion_min_duration).returns(2000000000)
+      user = nil
+      freeze_time(500.days.ago) do
+        user = create_leader_user
+      end
+      expect(user).to be_on_tl3_grace_period
+      TrustLevel3Requirements.any_instance.stubs(:requirements_met?).returns(false)
+      TrustLevel3Requirements.any_instance.stubs(:requirements_lost?).returns(true)
+      run_job
+      expect(user.reload.trust_level).to eq(TrustLevel[3])
+    end
   end
 end