tailscale/ipn/message_test.go

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// Copyright (c) 2020 Tailscale Inc & 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 ipn
import (
"bytes"
"context"
"encoding/json"
"testing"
"time"
"tailscale.com/tailcfg"
"tailscale.com/tstest"
)
func TestReadWrite(t *testing.T) {
tstest.PanicOnLog()
tstest.ResourceCheck(t)
buf := bytes.Buffer{}
err := WriteMsg(&buf, []byte("Test string1"))
if err != nil {
t.Fatalf("write1: %v\n", err)
}
err = WriteMsg(&buf, []byte(""))
if err != nil {
t.Fatalf("write2: %v\n", err)
}
err = WriteMsg(&buf, []byte("Test3"))
if err != nil {
t.Fatalf("write3: %v\n", err)
}
b, err := ReadMsg(&buf)
if err != nil {
t.Fatalf("read1 error: %v", err)
}
if want, got := "Test string1", string(b); want != got {
t.Fatalf("read1: %#v != %#v\n", want, got)
}
b, err = ReadMsg(&buf)
if err != nil {
t.Fatalf("read2 error: %v", err)
}
if want, got := "", string(b); want != got {
t.Fatalf("read2: %#v != %#v\n", want, got)
}
b, err = ReadMsg(&buf)
if err != nil {
t.Fatalf("read3 error: %v", err)
}
if want, got := "Test3", string(b); want != got {
t.Fatalf("read3: %#v != %#v\n", want, got)
}
b, err = ReadMsg(&buf)
if err == nil {
t.Fatalf("read4: expected error, got %#v\n", b)
}
}
func TestClientServer(t *testing.T) {
tstest.PanicOnLog()
tstest.ResourceCheck(t)
b := &FakeBackend{}
var bs *BackendServer
var bc *BackendClient
serverToClientCh := make(chan []byte, 16)
defer close(serverToClientCh)
go func() {
for b := range serverToClientCh {
bc.GotNotifyMsg(b)
}
}()
serverToClient := func(n Notify) {
b, err := json.Marshal(n)
if err != nil {
panic(err.Error())
}
serverToClientCh <- append([]byte{}, b...)
}
clientToServer := func(b []byte) {
bs.GotCommandMsg(context.TODO(), b)
}
slogf := func(fmt string, args ...any) {
t.Logf("s: "+fmt, args...)
}
clogf := func(fmt string, args ...any) {
t.Logf("c: "+fmt, args...)
}
bs = NewBackendServer(slogf, b, serverToClient)
// Verify that this doesn't break bs's callback:
NewBackendServer(slogf, b, nil)
bc = NewBackendClient(clogf, clientToServer)
ch := make(chan Notify, 256)
notify := func(n Notify) { ch <- n }
h, err := NewHandle(bc, clogf, notify, Options{
Prefs: &Prefs{
ControlURL: "http://example.com/fake",
},
})
if err != nil {
t.Fatalf("NewHandle error: %v\n", err)
}
notes := Notify{}
nn := []Notify{}
processNote := func(n Notify) {
nn = append(nn, n)
if n.State != nil {
t.Logf("state change: %v", *n.State)
notes.State = n.State
}
if n.Prefs != nil {
notes.Prefs = n.Prefs
}
if n.NetMap != nil {
notes.NetMap = n.NetMap
}
if n.Engine != nil {
notes.Engine = n.Engine
}
if n.BrowseToURL != nil {
notes.BrowseToURL = n.BrowseToURL
}
}
notesState := func() State {
if notes.State != nil {
return *notes.State
}
return NoState
}
flushUntil := func(wantFlush State) {
t.Helper()
timer := time.NewTimer(1 * time.Second)
loop:
for {
select {
case n := <-ch:
processNote(n)
if notesState() == wantFlush {
break loop
}
case <-timer.C:
t.Fatalf("timeout waiting for state %v, got %v", wantFlush, notes.State)
}
}
timer.Stop()
loop2:
for {
select {
case n := <-ch:
processNote(n)
default:
break loop2
}
}
if got, want := h.State(), notesState(); got != want {
t.Errorf("h.State()=%v, notes.State=%v (on flush until %v)\n", got, want, wantFlush)
}
}
flushUntil(NeedsLogin)
h.StartLoginInteractive()
flushUntil(Running)
if notes.NetMap == nil && h.NetMap() != nil {
t.Errorf("notes.NetMap == nil while h.NetMap != nil\nnotes:\n%v", nn)
}
h.UpdatePrefs(func(p *Prefs) {
p.WantRunning = false
})
flushUntil(Stopped)
h.Logout()
flushUntil(NeedsLogin)
h.Login(&tailcfg.Oauth2Token{
AccessToken: "google_id_token",
TokenType: GoogleIDTokenType,
})
flushUntil(Running)
}
func TestNilBackend(t *testing.T) {
var called *Notify
bs := NewBackendServer(t.Logf, nil, func(n Notify) {
called = &n
})
bs.SendErrorMessage("Danger, Will Robinson!")
if called == nil {
t.Errorf("expect callback to be called, wasn't")
}
if called.ErrMessage == nil || *called.ErrMessage != "Danger, Will Robinson!" {
t.Errorf("callback got wrong error: %v", called.ErrMessage)
}
}