Go app hangs when testing a function that contains a lock -

this function wrote adds request request queue:

func (self *requestqueue) addrequest(request *request) {      self.requestlock.lock()     self.queue[request.normalizedurl()] = request.responsechannel     self.requestlock.unlock() } 

and 1 of tests:

func testaddrequest(t *testing.t) {      before := len(rq.queue)      r := samplerequests(1)[0]     rq.addrequest(&r)      if (len(rq.queue) - 1) != before {         t.errorf("failed add request queue")     } } 

when run test, application hangs. if comment out test, works fine. think problem locking inside function. there i'm doing wrong? help!

the problem infinite loop in samplerequests() function:

func samplerequests(num int) []request {      requests := make([]request, num, num+10)     := 0; < len(requests); i++ {         r := newrequest("get", "http://api.openweathermap.org/data/2.5/weather", nil)         r.params.set("lat", "35")         r.params.add("lon", "139")         r.params.add("units", "metric")          requests = append(requests, r)     }      return requests } 

i checking if i less length of array in continuation condition of loop. each iteration, item added array, length increased , loop continued executing.