Move code to pkg

pkg/metrics/statsd_test.go

@@ -0,0 +1,51 @@
+package metrics
+
+import (
+	"context"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/containous/traefik/pkg/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(context.Background(), &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.backend.request.total:2.000000|c\n",
+		"traefik.backend.retries.total:2.000000|c\n",
+		"traefik.backend.request.duration:10000.000000|ms",
+		"traefik.config.reload.total:1.000000|c\n",
+		"traefik.config.reload.total:1.000000|c\n",
+		"traefik.entrypoint.request.total:1.000000|c\n",
+		"traefik.entrypoint.request.duration:10000.000000|ms",
+		"traefik.entrypoint.connections.open:1.000000|g\n",
+		"traefik.backend.server.up:1.000000|g\n",
+	}
+
+	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)
+		statsdRegistry.ConfigReloadsCounter().Add(1)
+		statsdRegistry.ConfigReloadsFailureCounter().Add(1)
+		statsdRegistry.EntrypointReqsCounter().With("entrypoint", "test").Add(1)
+		statsdRegistry.EntrypointReqDurationHistogram().With("entrypoint", "test").Observe(10000)
+		statsdRegistry.EntrypointOpenConnsGauge().With("entrypoint", "test").Set(1)
+		statsdRegistry.BackendServerUpGauge().With("backend:test", "url", "http://127.0.0.1").Set(1)
+	})
+}