You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: queue_test.go
    path of file: ./repos/gitkube/vendor/k8s.io/client-go/util/workqueue
    
    the code of the file until where you have to start completion: /*
Copyright 2015 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable 
    
func TestAddWhileProcessing(t *testing.T) {
	q := workqueue.New()

	// Start producers
	const producers = 50
	producerWG := sync.WaitGroup{}
	producerWG.Add(producers)
	for i := 0; i < producers; i++ {
		go func(i int) {
			defer producerWG.Done()
			q.Add(i)
		}(i)
	}

	// Start consumers
	const consumers = 10
	consumerWG := sync.WaitGroup{}
	consumerWG.Add(consumers)
	for i := 0; i < consumers; i++ {
		go func(i int) {
			defer consumerWG.Done()
			// Every worker will re-add every item up to two times.
			// This tests the dirty-while-processing case.
			counters := map[interface{}]int{}
			for {
				item, quit := q.Get()
				if quit {
					return
				}
				counters[item]++
				if counters[item] < 2 {
					q.Add(item)
				}
				q.Done(item)
			}
		}(i)
	}

	producerWG.Wait()
	q.ShutDown()
	consumerWG.Wait()
}