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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
package taildrop
import (
"os"
"slices"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"tailscale.com/ipn"
"tailscale.com/ipn/store/mem"
"tailscale.com/tstest"
"tailscale.com/tstime"
"tailscale.com/util/must"
)
func TestDeleter(t *testing.T) {
dir := t.TempDir()
var m manager
var fd fileDeleter
m.opts.Logf = t.Logf
m.opts.Clock = tstime.DefaultClock{Clock: tstest.NewClock(tstest.ClockOpts{
Start: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC),
})}
m.opts.State = must.Get(mem.New(nil, ""))
m.opts.fileOps, _ = newFileOps(dir)
must.Do(m.touchFile("foo.partial"))
must.Do(m.touchFile("bar.partial"))
must.Do(m.touchFile("fizz"))
must.Do(m.touchFile("fizz.deleted"))
must.Do(m.touchFile("buzz.deleted")) // lacks a matching "buzz" file
checkDirectory := func(want ...string) {
t.Helper()
var got []string
for _, de := range must.Get(os.ReadDir(dir)) {
got = append(got, de.Name())
}
slices.Sort(got)
slices.Sort(want)
if diff := cmp.Diff(got, want); diff != "" {
t.Fatalf("directory mismatch (-got +want):\n%s", diff)
}
}
clock := tstest.NewClock(tstest.ClockOpts{Start: time.Date(2000, 1, 1, 0, 0, 0, 0, time.UTC)})
advance := func(d time.Duration) {
t.Helper()
t.Logf("advance: %v", d)
clock.Advance(d)
}
eventsChan := make(chan string, 1000)
checkEvents := func(want ...string) {
t.Helper()
tm := time.NewTimer(10 * time.Second)
defer tm.Stop()
var got []string
for range want {
select {
case event := <-eventsChan:
t.Logf("event: %s", event)
got = append(got, event)
case <-tm.C:
t.Fatalf("timed out waiting for event: got %v, want %v", got, want)
}
}
slices.Sort(got)
slices.Sort(want)
if diff := cmp.Diff(got, want); diff != "" {
t.Fatalf("events mismatch (-got +want):\n%s", diff)
}
}
eventHook := func(event string) { eventsChan <- event }
m.opts.Logf = t.Logf
m.opts.Clock = tstime.DefaultClock{Clock: clock}
m.opts.State = must.Get(mem.New(nil, ""))
m.opts.fileOps, _ = newFileOps(dir)
must.Do(m.opts.State.WriteState(ipn.TaildropReceivedKey, []byte{1}))
fd.Init(&m, eventHook)
defer fd.Shutdown()
insert := func(name string) {
t.Helper()
t.Logf("insert: %v", name)
fd.Insert(name)
}
remove := func(name string) {
t.Helper()
t.Logf("remove: %v", name)
fd.Remove(name)
}
checkEvents("start full-scan")
checkEvents("end full-scan", "start waitAndDelete")
checkDirectory("foo.partial", "bar.partial", "buzz.deleted")
advance(deleteDelay / 2)
checkDirectory("foo.partial", "bar.partial", "buzz.deleted")
advance(deleteDelay / 2)
checkEvents("deleted foo.partial", "deleted bar.partial", "deleted buzz.deleted")
checkEvents("end waitAndDelete")
checkDirectory()
must.Do(m.touchFile("one.partial"))
insert("one.partial")
checkEvents("start waitAndDelete")
advance(deleteDelay / 4)
must.Do(m.touchFile("two.partial"))
insert("two.partial")
advance(deleteDelay / 4)
must.Do(m.touchFile("three.partial"))
insert("three.partial")
advance(deleteDelay / 4)
must.Do(m.touchFile("four.partial"))
insert("four.partial")
advance(deleteDelay / 4)
checkEvents("deleted one.partial")
checkDirectory("two.partial", "three.partial", "four.partial")
checkEvents("end waitAndDelete", "start waitAndDelete")
advance(deleteDelay / 4)
checkEvents("deleted two.partial")
checkDirectory("three.partial", "four.partial")
checkEvents("end waitAndDelete", "start waitAndDelete")
advance(deleteDelay / 4)
checkEvents("deleted three.partial")
checkDirectory("four.partial")
checkEvents("end waitAndDelete", "start waitAndDelete")
advance(deleteDelay / 4)
checkEvents("deleted four.partial")
checkDirectory()
checkEvents("end waitAndDelete")
insert("wuzz.partial")
checkEvents("start waitAndDelete")
remove("wuzz.partial")
checkEvents("end waitAndDelete")
}
// Test that the asynchronous full scan of the taildrop directory does not occur
// on a cold start if taildrop has never received any files.
func TestDeleterInitWithoutTaildrop(t *testing.T) {
var m manager
var fd fileDeleter
m.opts.Logf = t.Logf
m.opts.State = must.Get(mem.New(nil, ""))
m.opts.fileOps, _ = newFileOps(t.TempDir())
fd.Init(&m, func(event string) { t.Errorf("unexpected event: %v", event) })
fd.Shutdown()
}
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