cloudflared-mirror/connection/observer_test.go

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package connection
import (
"strconv"
"sync"
"testing"
"time"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
"github.com/stretchr/testify/assert"
)
func TestSendUrl(t *testing.T) {
observer := NewObserver(&log, &log, false)
observer.SendURL("my-url.com")
assert.Equal(t, 1.0, getCounterValue(t, observer.metrics.userHostnamesCounts, "https://my-url.com"))
observer.SendURL("https://another-long-one.com")
assert.Equal(t, 1.0, getCounterValue(t, observer.metrics.userHostnamesCounts, "https://another-long-one.com"))
}
func getCounterValue(t *testing.T, metric *prometheus.CounterVec, val string) float64 {
var m = &dto.Metric{}
err := metric.WithLabelValues(val).Write(m)
assert.NoError(t, err)
return m.Counter.GetValue()
}
func TestRegisterServerLocation(t *testing.T) {
m := newTunnelMetrics()
tunnels := 20
var wg sync.WaitGroup
wg.Add(tunnels)
for i := 0; i < tunnels; i++ {
go func(i int) {
id := strconv.Itoa(i)
m.registerServerLocation(id, "LHR")
wg.Done()
}(i)
}
wg.Wait()
for i := 0; i < tunnels; i++ {
id := strconv.Itoa(i)
assert.Equal(t, "LHR", m.oldServerLocations[id])
}
wg.Add(tunnels)
for i := 0; i < tunnels; i++ {
go func(i int) {
id := strconv.Itoa(i)
m.registerServerLocation(id, "AUS")
wg.Done()
}(i)
}
wg.Wait()
for i := 0; i < tunnels; i++ {
id := strconv.Itoa(i)
assert.Equal(t, "AUS", m.oldServerLocations[id])
}
}
func TestObserverEventsDontBlock(t *testing.T) {
observer := NewObserver(&log, &log, false)
var mu sync.Mutex
observer.RegisterSink(EventSinkFunc(func(_ Event) {
// callback will block if lock is already held
mu.Lock()
mu.Unlock()
}))
timeout := time.AfterFunc(5*time.Second, func() {
mu.Unlock() // release the callback on timer expiration
t.Fatal("observer is blocked")
})
mu.Lock() // block the callback
for i := 0; i < 2*observerChannelBufferSize; i++ {
observer.sendRegisteringEvent(0)
}
if pending := timeout.Stop(); pending {
// release the callback if timer hasn't expired yet
mu.Unlock()
}
}
type eventCollectorSink struct {
observedEvents []Event
mu sync.Mutex
}
func (s *eventCollectorSink) OnTunnelEvent(event Event) {
s.mu.Lock()
defer s.mu.Unlock()
s.observedEvents = append(s.observedEvents, event)
}
func (s *eventCollectorSink) assertSawEvent(t *testing.T, event Event) {
s.mu.Lock()
defer s.mu.Unlock()
assert.Contains(t, s.observedEvents, event)
}