fix test case std to report correct metrics (#999)

Author: asm582

Makefile

@@ -285,6 +285,7 @@ test-benchmark: manifests generate fmt vet ## Run benchmark tests (scale-up-late
 	USE_SIMULATOR=$(USE_SIMULATOR) \
 	SCALER_BACKEND=$(SCALER_BACKEND) \
 	MODEL_ID=$(MODEL_ID) \
+	PROMETHEUS_TOKEN=$$(oc whoami -t 2>/dev/null || echo "") \
 	go test ./test/benchmark/ -timeout 75m -v -ginkgo.v \
 		-ginkgo.label-filter="phase3a"; \
 	TEST_EXIT_CODE=$$?; \

test/utils/e2eutils.go

@@ -981,20 +981,37 @@ func (p *PrometheusClient) API() promv1.API {
 	return p.client
 }
 
+type authRoundTripper struct {
+	token string
+	rt    http.RoundTripper
+}
+
+func (a *authRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	req.Header.Set("Authorization", "Bearer "+a.token)
+	return a.rt.RoundTrip(req)
+}
+
 // creates a new Prometheus client for e2e tests
 func NewPrometheusClient(baseURL string, insecureSkipVerify bool) (*PrometheusClient, error) {
 	config := promAPI.Config{
 		Address: baseURL,
 	}
 
-	if insecureSkipVerify {
-		roundTripper := promAPI.DefaultRoundTripper
-		if rt, ok := roundTripper.(*http.Transport); ok {
+	roundTripper := promAPI.DefaultRoundTripper
+	if rt, ok := roundTripper.(*http.Transport); ok {
+		if insecureSkipVerify {
 			rt.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
 		}
-		config.RoundTripper = roundTripper
 	}
 
+	if token := os.Getenv("PROMETHEUS_TOKEN"); token != "" {
+		roundTripper = &authRoundTripper{
+			token: token,
+			rt:    roundTripper,
+		}
+	}
+	config.RoundTripper = roundTripper
+
 	client, err := promAPI.NewClient(config)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create prometheus client: %w", err)