forked from cerc-io/plugeth
65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
// Copyright 2015 The go-ethereum Authors
|
|
// This file is part of go-ethereum.
|
|
//
|
|
// go-ethereum is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// go-ethereum is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package nat
|
|
|
|
import (
|
|
"bytes"
|
|
"net"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
// This test checks that autodisc doesn't hang and returns
|
|
// consistent results when multiple goroutines call its methods
|
|
// concurrently.
|
|
func TestAutoDiscRace(t *testing.T) {
|
|
ad := startautodisc("thing", func() Interface {
|
|
time.Sleep(500 * time.Millisecond)
|
|
return extIP{33, 44, 55, 66}
|
|
})
|
|
|
|
// Spawn a few concurrent calls to ad.ExternalIP.
|
|
type rval struct {
|
|
ip net.IP
|
|
err error
|
|
}
|
|
results := make(chan rval, 50)
|
|
for i := 0; i < cap(results); i++ {
|
|
go func() {
|
|
ip, err := ad.ExternalIP()
|
|
results <- rval{ip, err}
|
|
}()
|
|
}
|
|
|
|
// Check that they all return the correct result within the deadline.
|
|
deadline := time.After(2 * time.Second)
|
|
for i := 0; i < cap(results); i++ {
|
|
select {
|
|
case <-deadline:
|
|
t.Fatal("deadline exceeded")
|
|
case rval := <-results:
|
|
if rval.err != nil {
|
|
t.Errorf("result %d: unexpected error: %v", i, rval.err)
|
|
}
|
|
wantIP := net.IP{33, 44, 55, 66}
|
|
if !bytes.Equal(rval.ip, wantIP) {
|
|
t.Errorf("result %d: got IP %v, want %v", i, rval.ip, wantIP)
|
|
}
|
|
}
|
|
}
|
|
}
|