Function TestCollectorFunc

prometheus/collectorfunc_test.go:18–54

(t *testing.T)

import "testing"

func TestCollectorFunc(t *testing.T) {
	testDesc := NewDesc(
		"test_metric",
		"A test metric",
		nil, nil,
	)

	cf := CollectorFunc(func(ch chan<- Metric) {
		ch <- MustNewConstMetric(
			testDesc,
			GaugeValue,
			42.0,
		)
	})

	ch := make(chan Metric, 1)
	cf.Collect(ch)
	close(ch)

	metric := <-ch
	if metric == nil {
		t.Fatal("Expected metric, got nil")
	}

	descCh := make(chan *Desc, 1)
	cf.Describe(descCh)
	close(descCh)

	desc := <-descCh
	if desc == nil {
		t.Fatal("Expected desc, got nil")
	}

	if desc.String() != testDesc.String() {
		t.Fatalf("Expected %s, got %s", testDesc.String(), desc.String())
	}
}

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