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tailscale/net/netmon/netmon_test.go

111 lines
2.1 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package netmon
import (
"flag"
"sync/atomic"
"testing"
"time"
)
func TestMonitorStartClose(t *testing.T) {
mon, err := New(t.Logf)
if err != nil {
t.Fatal(err)
}
mon.Start()
if err := mon.Close(); err != nil {
t.Fatal(err)
}
}
func TestMonitorJustClose(t *testing.T) {
mon, err := New(t.Logf)
if err != nil {
t.Fatal(err)
}
if err := mon.Close(); err != nil {
t.Fatal(err)
}
}
func TestMonitorInjectEvent(t *testing.T) {
mon, err := New(t.Logf)
if err != nil {
t.Fatal(err)
}
defer mon.Close()
got := make(chan bool, 1)
mon.RegisterChangeCallback(func(*ChangeDelta) {
select {
case got <- true:
default:
}
})
mon.Start()
mon.InjectEvent()
select {
case <-got:
// Pass.
case <-time.After(5 * time.Second):
t.Fatal("timeout waiting for callback")
}
}
var (
monitor = flag.String("monitor", "", `go into monitor mode like 'route monitor'; test never terminates. Value can be either "raw" or "callback"`)
monitorDuration = flag.Duration("monitor-duration", 0, "if non-zero, how long to run TestMonitorMode. Zero means forever.")
)
func TestMonitorMode(t *testing.T) {
switch *monitor {
case "":
t.Skip("skipping non-test without --monitor")
case "raw", "callback":
default:
t.Skipf(`invalid --monitor value: must be "raw" or "callback"`)
}
mon, err := New(t.Logf)
if err != nil {
t.Fatal(err)
}
switch *monitor {
case "raw":
var closed atomic.Bool
if *monitorDuration != 0 {
t := time.AfterFunc(*monitorDuration, func() {
closed.Store(true)
mon.Close()
})
defer t.Stop()
}
for {
msg, err := mon.om.Receive()
if closed.Load() {
return
}
if err != nil {
t.Fatal(err)
}
t.Logf("msg: %#v", msg)
}
case "callback":
var done <-chan time.Time
if *monitorDuration != 0 {
t := time.NewTimer(*monitorDuration)
defer t.Stop()
done = t.C
}
n := 0
mon.RegisterChangeCallback(func(d *ChangeDelta) {
n++
t.Logf("cb: changed=%v, ifSt=%v", d.Major, d.New)
})
mon.Start()
<-done
t.Logf("%v callbacks", n)
}
}