fixed actual pid of running worker

lib/resque/worker.rb

@@ -453,7 +453,7 @@ def inspect
     # The string representation is the same as the id for this worker
     # instance. Can be used with `Worker.find`.
     def to_s
-      @to_s ||= "#{hostname}:#{pid}:#{@queues.join(',')}"
+      @to_s ||= "#{hostname}:#{Process.pid}:#{@queues.join(',')}"
     end
     alias_method :id, :to_s
 
@@ -464,7 +464,7 @@ def hostname
 
     # Returns PID of running worker
     def pid
-      @pid ||= Process.pid
+      @pid ||= to_s.split(":")[1].to_i
     end
 
     # Returns an array of string pids of all the other workers on this

test/worker_test.rb

@@ -314,6 +314,6 @@
   end
 
   test "returns PID of running process" do
-    assert_equal Process.pid, @worker.pid
+    assert_equal @worker.to_s.split(":")[1].to_i, @worker.pid
   end
 end