Function fetchMetrics

pkg/ingester/ingester_test.go:7631–7658

fetchMetrics is a helper function to fetch metrics from a registry that match a prefix

(t *testing.T, registry *prometheus.Registry, prefix string)

// fetchMetrics is a helper function to fetch metrics from a registry that match a prefix
func fetchMetrics(t *testing.T, registry *prometheus.Registry, prefix string) []string {
	metricFamilies, err := registry.Gather()
	require.NoError(t, err)

	var metrics []string
	for _, mf := range metricFamilies {
		if strings.HasPrefix(mf.GetName(), prefix) {
			for _, m := range mf.GetMetric() {
				var labels []string
				for _, label := range m.GetLabel() {
					labels = append(labels, fmt.Sprintf(`%s="%s"`, label.GetName(), label.GetValue()))
				}
				labelStr := strings.Join(labels, ",")

				var value string
				if m.Counter != nil {
					value = fmt.Sprintf("%v", m.Counter.GetValue())
				} else if m.Gauge != nil {
					value = fmt.Sprintf("%v", m.Gauge.GetValue())
				}

				metricLine := fmt.Sprintf("%s{%s} %s", mf.GetName(), labelStr, value)
				metrics = append(metrics, metricLine)
			}
		}
	}
	return metrics
}

func TestIngester_checkRegexMatcherLimits(t *testing.T) {
	const userID = "test-user"