instance method worker_loop

# File activesupport/lib/active_support/testing/parallelization/thread_pool_executor.rb, line 37
          def worker_loop(worker_id)
            while job = @distributor.take(worker_id: worker_id)
              klass, method, reporter = job

              reporter.synchronize { reporter.prerecord klass, method }
              result = if Minitest.respond_to? :run_one_method then
                Minitest.run_one_method klass, method
              else
                klass.new(method).run
              end
              reporter.synchronize { reporter.record result }
            end
          end