cloudflared-mirror/connection/observer_test.go

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package connection
import (
"strconv"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
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, 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()
}
}