traefik/metrics/statsd_test.go

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package metrics
import (
"net/http"
"testing"
"time"
"github.com/containous/traefik/types"
"github.com/stvp/go-udp-testing"
)
func TestStatsD(t *testing.T) {
udp.SetAddr(":18125")
// This is needed to make sure that UDP Listener listens for data a bit longer, otherwise it will quit after a millisecond
udp.Timeout = 5 * time.Second
statsdRegistry := RegisterStatsd(&types.Statsd{Address: ":18125", PushInterval: "1s"})
defer StopStatsd()
if !statsdRegistry.IsEnabled() {
t.Errorf("Statsd registry should return true for IsEnabled()")
}
expected := []string{
// We are only validating counts, as it is nearly impossible to validate latency, since it varies every run
"traefik.requests.total:2.000000|c\n",
"traefik.backend.retries.total:2.000000|c\n",
"traefik.request.duration:10000.000000|ms",
}
udp.ShouldReceiveAll(t, expected, func() {
statsdRegistry.BackendReqsCounter().With("service", "test", "code", string(http.StatusOK), "method", http.MethodGet).Add(1)
statsdRegistry.BackendReqsCounter().With("service", "test", "code", string(http.StatusNotFound), "method", http.MethodGet).Add(1)
statsdRegistry.BackendRetriesCounter().With("service", "test").Add(1)
statsdRegistry.BackendRetriesCounter().With("service", "test").Add(1)
statsdRegistry.BackendReqDurationHistogram().With("service", "test", "code", string(http.StatusOK)).Observe(10000)
})
}