add prometheus server test

test/e2e/scenarios/hubble/amametrics_test.go

@@ -0,0 +1,42 @@
+//go:build e2e
+// +build e2e
+
+package hubble
+
+import (
+	"context"
+	"testing"
+
+	"github.com/prometheus/client_golang/api"
+	promv1 "github.com/prometheus/client_golang/api/prometheus/v1"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	promHubbleJob = "hubble-pods"
+)
+
+func TestPrometheusQuery(t *testing.T) {
+	client, err := api.NewClient(api.Config{
+		Address: "http://localhost:9090",
+	})
+
+	require.NoError(t, err)
+	promapi := promv1.NewAPI(client)
+	ctx := context.Background()
+	targets, err := promapi.Targets(ctx)
+	require.NoError(t, err)
+	require.NotNil(t, targets)
+
+	hubbleActiveTarget := &promv1.ActiveTarget{
+		ScrapePool: promHubbleJob,
+		Health:     "up",
+	}
+
+	for _, target := range targets.Active {
+		if target.ScrapePool == hubbleActiveTarget.ScrapePool {
+			require.Equal(t, hubbleActiveTarget.Health, hubbleActiveTarget.Health)
+			break
+		}
+	}
+}