traefik/middlewares/datadog_test.go

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package middlewares
import (
"fmt"
"net/http"
"net/http/httptest"
"testing"
"time"
"github.com/containous/traefik/testhelpers"
"github.com/containous/traefik/types"
"github.com/stvp/go-udp-testing"
"github.com/urfave/negroni"
)
func TestDatadog(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
recorder := httptest.NewRecorder()
InitDatadogClient(&types.Datadog{":18125", "1s"})
n := negroni.New()
dd := NewDataDog("test")
defer StopDatadogClient()
metricsMiddlewareBackend := NewMetricsWrapper(dd)
n.Use(metricsMiddlewareBackend)
r := http.NewServeMux()
r.HandleFunc(`/ok`, func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
fmt.Fprintln(w, "ok")
})
r.HandleFunc(`/not-found`, func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
fmt.Fprintln(w, "not-found")
})
n.UseHandler(r)
req1 := testhelpers.MustNewRequest(http.MethodGet, "http://localhost:3000/ok", nil)
req2 := testhelpers.MustNewRequest(http.MethodGet, "http://localhost:3000/not-found", nil)
retryListener := NewMetricsRetryListener(dd)
retryListener.Retried(1)
retryListener.Retried(2)
expected := []string{
// We are only validating counts, as it is nearly impossible to validate latency, since it varies every run
"traefik.requests.total:1.000000|c|#service:test,code:404,method:GET\n",
"traefik.requests.total:1.000000|c|#service:test,code:200,method:GET\n",
"traefik.backend.retries.total:2.000000|c|#service:test\n",
"traefik.request.duration",
}
udp.ShouldReceiveAll(t, expected, func() {
n.ServeHTTP(recorder, req1)
n.ServeHTTP(recorder, req2)
})
}