client_golang/prometheus/timer_test.go

108 lines
2.7 KiB
Go

// Copyright 2016 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package prometheus
import (
"testing"
dto "github.com/prometheus/client_model/go"
)
func TestTimerObserve(t *testing.T) {
his := NewHistogram(HistogramOpts{
Name: "test_histogram",
})
sum := NewSummary(SummaryOpts{
Name: "test_summary",
})
gauge := NewGauge(GaugeOpts{
Name: "test_gauge",
})
func() {
hisTimer := NewTimer().With(his)
sumTimer := NewTimer().With(sum)
gaugeTimer := NewTimer().WithGauge(gauge)
defer hisTimer.ObserveDuration()
defer sumTimer.ObserveDuration()
defer gaugeTimer.ObserveDuration()
}()
m := &dto.Metric{}
his.Write(m)
if want, got := uint64(1), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for histogram, got %d", want, got)
}
m.Reset()
sum.Write(m)
if want, got := uint64(1), m.GetSummary().GetSampleCount(); want != got {
t.Errorf("want %d observations for summary, got %d", want, got)
}
m.Reset()
gauge.Write(m)
if got := m.GetGauge().GetValue(); got <= 0 {
t.Errorf("want value > 0 for gauge, got %f", got)
}
}
func TestTimerEmpty(t *testing.T) {
emptyTimer := NewTimer()
emptyTimer.ObserveDuration()
// Do nothing, just demonstrate it works without panic.
}
func TestTimerUnset(t *testing.T) {
his := NewHistogram(HistogramOpts{
Name: "test_histogram",
})
func() {
timer := NewTimer().With(his)
defer timer.ObserveDuration()
timer.With(nil)
}()
m := &dto.Metric{}
his.Write(m)
if want, got := uint64(0), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for histogram, got %d", want, got)
}
}
func TestTimerChange(t *testing.T) {
his := NewHistogram(HistogramOpts{
Name: "test_histogram",
})
sum := NewSummary(SummaryOpts{
Name: "test_summary",
})
func() {
timer := NewTimer().With(his)
defer timer.ObserveDuration()
timer.With(sum)
}()
m := &dto.Metric{}
his.Write(m)
if want, got := uint64(0), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for histogram, got %d", want, got)
}
m.Reset()
sum.Write(m)
if want, got := uint64(1), m.GetSummary().GetSampleCount(); want != got {
t.Errorf("want %d observations for summary, got %d", want, got)
}
}