func TestSpeculativeHandler(t *testing.T) {
t.Parallel()
// test with an even multiple of the buffer size, less than full buffer size
// and not a multiple of the buffer size
for _, count := range []int{10000, 50, 432} {
recs := make(chan *log.Record)
done := make(chan int)
spec := SpeculativeHandler(100, log.ChannelHandler(recs))
go func() {
defer close(done)
expectedCount := int(math.Min(float64(count), float64(100)))
expectedIdx := count - expectedCount
for r := range recs {
if r.Ctx[1] != expectedIdx {
t.Errorf("Bad ctx 'i', got %d expected %d", r.Ctx[1], expectedIdx)
return
}
expectedIdx++
expectedCount--
if expectedCount == 0 {
// got everything we expected
break
}
}
select {
case <-recs:
t.Errorf("got an extra record we shouldn't have!")
default:
}
}()
lg := log.New()
lg.SetHandler(spec)
for i := 0; i < count; i++ {
lg.Debug("test speculative", "i", i)
}
go spec.Flush()
// wait for the go routine to finish
<-done
}
}
func TestHotSwapHandler(t *testing.T) {
t.Parallel()
h1, r1 := testHandler()
l := log.New()
h := HotSwapHandler(h1)
l.SetHandler(h)
l.Info("to h1")
if r1.Msg != "to h1" {
t.Fatalf("didn't get expected message to h1")
}
h2, r2 := testHandler()
h.Swap(h2)
l.Info("to h2")
if r2.Msg != "to h2" {
t.Fatalf("didn't get expected message to h2")
}
}
func TestErrorHandler(t *testing.T) {
t.Parallel()
h, r := testHandler()
lg := log.New()
lg.SetHandler(EscalateErrHandler(
log.LvlFilterHandler(log.LvlError, h)))
lg.Debug("some function result", "err", nil)
if r.Msg != "" {
t.Fatalf("Expected debug level message to be filtered")
}
lg.Debug("some function result", "err", errors.New("failed operation"))
if r.Msg != "some function result" {
t.Fatalf("Expected debug level message to be escalated and pass lvlfilter")
}
if r.Lvl != log.LvlError {
t.Fatalf("Expected debug level message to be escalated to LvlError")
}
}