76 lines
1.7 KiB
Go
76 lines
1.7 KiB
Go
// 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 wgengine
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"strings"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func TestWatchdog(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
t.Run("default watchdog does not fire", func(t *testing.T) {
|
|
t.Parallel()
|
|
e, err := NewFakeUserspaceEngine(t.Logf, 0)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
e = NewWatchdog(e)
|
|
e.(*watchdogEngine).maxWait = 150 * time.Millisecond
|
|
e.(*watchdogEngine).logf = t.Logf
|
|
e.(*watchdogEngine).fatalf = t.Fatalf
|
|
|
|
e.RequestStatus()
|
|
e.RequestStatus()
|
|
e.RequestStatus()
|
|
e.Close()
|
|
})
|
|
|
|
t.Run("watchdog fires on blocked getStatus", func(t *testing.T) {
|
|
t.Parallel()
|
|
e, err := NewFakeUserspaceEngine(t.Logf, 0)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
usEngine := e.(*userspaceEngine)
|
|
e = NewWatchdog(e)
|
|
wdEngine := e.(*watchdogEngine)
|
|
wdEngine.maxWait = 100 * time.Millisecond
|
|
|
|
logBuf := new(bytes.Buffer)
|
|
fatalCalled := make(chan struct{})
|
|
wdEngine.logf = func(format string, args ...interface{}) {
|
|
fmt.Fprintf(logBuf, format+"\n", args...)
|
|
}
|
|
wdEngine.fatalf = func(format string, args ...interface{}) {
|
|
t.Logf("FATAL: %s", fmt.Sprintf(format, args...))
|
|
fatalCalled <- struct{}{}
|
|
}
|
|
|
|
usEngine.wgLock.Lock() // blocks getStatus so the watchdog will fire
|
|
|
|
go e.RequestStatus()
|
|
|
|
select {
|
|
case <-fatalCalled:
|
|
if !strings.Contains(logBuf.String(), "goroutine profile: total ") {
|
|
t.Errorf("fatal called without watchdog stacks, got: %s", logBuf.String())
|
|
}
|
|
// expected
|
|
case <-time.After(3 * time.Second):
|
|
t.Fatalf("watchdog failed to fire")
|
|
}
|
|
|
|
usEngine.wgLock.Unlock()
|
|
wdEngine.fatalf = t.Fatalf
|
|
wdEngine.Close()
|
|
})
|
|
}
|