package server

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/prometheus/client_golang/prometheus/promhttp"
)

// TestNoMetricsRecordedWithoutMetricsUsername checks that with no metrics
// username set the router records nothing about the requests it serves.
// /metrics is not served then, so the process-wide Prometheus registry is
// read directly. TestMaintenanceModeKeepsOtherRoutes records into the same
// registry, but never a GET /robots.txt.
func TestNoMetricsRecordedWithoutMetricsUsername(t *testing.T) {
	t.Parallel()

	s := newTestServer(t)
	s.ServeHTTP(httptest.NewRecorder(), httptest.NewRequestWithContext(
		t.Context(), http.MethodGet, "/robots.txt", nil))

	rec := httptest.NewRecorder()
	promhttp.Handler().ServeHTTP(rec, httptest.NewRequestWithContext(
		t.Context(), http.MethodGet, "/metrics", nil))

	if strings.Contains(rec.Body.String(), `handler="/robots.txt"`) {
		t.Errorf("with no metrics username GET /robots.txt was recorded:\n%s",
			rec.Body.String())
	}
}