}
		}

		srvWG.Wait()
		ts.Close()
	}
}

// A cancelTest is a test of request cancellation.
type cancelTest struct {
	mode     testMode
	newReq   func(req *Request) *Request       // prepare the request to cancel
	cancel   func(tr *Transport, req *Request) // cancel the request
	checkErr func(when string, err error)      // verify the expected error
}