Function testCurryVec

prometheus/vec_test.go:506–701

(t *testing.T, vec *CounterVec)

}

func testCurryVec(t *testing.T, vec *CounterVec) {
	assertMetrics := func(t *testing.T) {
		n := 0
		for _, m := range vec.metrics {
			n += len(m)
		}
		if n != 2 {
			t.Error("expected two metrics, got", n)
		}
		m := &dto.Metric{}
		c1, err := vec.GetMetricWithLabelValues("1", "2", "3")
		if err != nil {
			t.Fatal("unexpected error getting metric:", err)
		}
		c1.Write(m)
		if want, got := 1., m.GetCounter().GetValue(); want != got {
			t.Errorf("want %f as counter value, got %f", want, got)
		}
		m.Reset()
		c2, err := vec.GetMetricWithLabelValues("11", "22", "33")
		if err != nil {
			t.Fatal("unexpected error getting metric:", err)
		}
		c2.Write(m)
		if want, got := 1., m.GetCounter().GetValue(); want != got {
			t.Errorf("want %f as counter value, got %f", want, got)
		}
	}

	assertNoMetric := func(t *testing.T) {
		if n := len(vec.metrics); n != 0 {
			t.Error("expected no metrics, got", n)
		}
	}

	t.Run("zero labels", func(t *testing.T) {
		c1 := vec.MustCurryWith(nil)
		c2 := vec.MustCurryWith(nil)
		c1.WithLabelValues("1", "2", "3").Inc()
		c2.With(Labels{"one": "11", "two": "22", "three": "33"}).Inc()
		assertMetrics(t)
		if !c1.Delete(Labels{"one": "1", "two": "2", "three": "3"}) {
			t.Error("deletion failed")
		}
		if !c2.DeleteLabelValues("11", "22", "33") {
			t.Error("deletion failed")
		}
		assertNoMetric(t)
	})
	t.Run("first label", func(t *testing.T) {
		c1 := vec.MustCurryWith(Labels{"one": "1"})
		c2 := vec.MustCurryWith(Labels{"one": "11"})
		c1.WithLabelValues("2", "3").Inc()
		c2.With(Labels{"two": "22", "three": "33"}).Inc()
		assertMetrics(t)
		if c1.Delete(Labels{"two": "22", "three": "33"}) {
			t.Error("deletion unexpectedly succeeded")
		}