Function TestToFloat64

prometheus/testutil/testutil_test.go:42–124

(t *testing.T)

}

func TestToFloat64(t *testing.T) {
	gaugeWithAValueSet := prometheus.NewGauge(prometheus.GaugeOpts{})
	gaugeWithAValueSet.Set(3.14)

	counterVecWithOneElement := prometheus.NewCounterVec(prometheus.CounterOpts{}, []string{"foo"})
	counterVecWithOneElement.WithLabelValues("bar").Inc()

	counterVecWithTwoElements := prometheus.NewCounterVec(prometheus.CounterOpts{}, []string{"foo"})
	counterVecWithTwoElements.WithLabelValues("bar").Add(42)
	counterVecWithTwoElements.WithLabelValues("baz").Inc()

	histogramVecWithOneElement := prometheus.NewHistogramVec(prometheus.HistogramOpts{}, []string{"foo"})
	histogramVecWithOneElement.WithLabelValues("bar").Observe(2.7)

	scenarios := map[string]struct {
		collector prometheus.Collector
		panics    bool
		want      float64
	}{
		"simple counter": {
			collector: prometheus.NewCounter(prometheus.CounterOpts{}),
			panics:    false,
			want:      0,
		},
		"simple gauge": {
			collector: prometheus.NewGauge(prometheus.GaugeOpts{}),
			panics:    false,
			want:      0,
		},
		"simple untyped": {
			collector: untypedCollector{},
			panics:    false,
			want:      2001,
		},
		"simple histogram": {
			collector: prometheus.NewHistogram(prometheus.HistogramOpts{}),
			panics:    true,
		},
		"simple summary": {
			collector: prometheus.NewSummary(prometheus.SummaryOpts{}),
			panics:    true,
		},
		"simple gauge with an actual value set": {
			collector: gaugeWithAValueSet,
			panics:    false,
			want:      3.14,
		},
		"counter vec with zero elements": {
			collector: prometheus.NewCounterVec(prometheus.CounterOpts{}, nil),
			panics:    true,
		},
		"counter vec with one element": {
			collector: counterVecWithOneElement,
			panics:    false,
			want:      1,
		},
		"counter vec with two elements": {
			collector: counterVecWithTwoElements,