Function TestCollectorFuncWithRegistry

prometheus/collectorfunc_test.go:56–83

(t *testing.T)

}

func TestCollectorFuncWithRegistry(t *testing.T) {
	reg := NewPedanticRegistry()

	cf := CollectorFunc(func(ch chan<- Metric) {
		ch <- MustNewConstMetric(
			NewDesc(
				"test_metric",
				"A test metric",
				nil, nil,
			),
			GaugeValue,
			42.0,
		)
	})

	if err := reg.Register(cf); err != nil {
		t.Errorf("Failed to register CollectorFunc: %v", err)
	}

	collectedMetrics, err := reg.Gather()
	if err != nil {
		t.Errorf("Failed to gather metrics: %v", err)
	}

	if len(collectedMetrics) != 1 {
		t.Errorf("Expected 1 metric family, got %d", len(collectedMetrics))
	}
}