Don't allow delay usage on Sidekiq::Worker

lib/sidekiq/worker.rb

@@ -38,6 +38,18 @@ def logger
 
     module ClassMethods
 
+      def delay(*args)
+        raise ArgumentError, "Do not call .delay on a Sidekiq::Worker class, call .perform_async"
+      end
+
+      def delay_for(*args)
+        raise ArgumentError, "Do not call .delay_for on a Sidekiq::Worker class, call .perform_in"
+      end
+
+      def delay_until(*args)
+        raise ArgumentError, "Do not call .delay_until on a Sidekiq::Worker class, call .perform_at"
+      end
+
       def perform_async(*args)
         client_push('class' => self, 'args' => args)
       end

test/test_api.rb

@@ -202,10 +202,10 @@ class ApiWorker
     end
 
     it 'unwraps delayed jobs' do
-      ApiWorker.delay.foo(1,2,3)
+      Sidekiq::Queue.delay.foo(1,2,3)
       q = Sidekiq::Queue.new
       x = q.first
-      assert_equal "TestApi::ApiWorker.foo", x.display_class
+      assert_equal "Sidekiq::Queue.foo", x.display_class
       assert_equal [1,2,3], x.display_args
     end