| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package net |
| |
| import ( |
| "flag" |
| "fmt" |
| "testing" |
| ) |
| |
| var testDNSFlood = flag.Bool("dnsflood", false, "whether to test dns query flooding") |
| |
| func TestDNSThreadLimit(t *testing.T) { |
| if !*testDNSFlood { |
| t.Skip("test disabled; use -dnsflood to enable") |
| } |
| |
| const N = 10000 |
| c := make(chan int, N) |
| for i := 0; i < N; i++ { |
| go func(i int) { |
| LookupIP(fmt.Sprintf("%d.net-test.golang.org", i)) |
| c <- 1 |
| }(i) |
| } |
| // Don't bother waiting for the stragglers; stop at 0.9 N. |
| for i := 0; i < N*9/10; i++ { |
| if i%100 == 0 { |
| //println("TestDNSThreadLimit:", i) |
| } |
| <-c |
| } |
| |
| // If we're still here, it worked. |
| } |