client_golang/prometheus/timer_test.go

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2016-10-31 15:24:29 +03:00
// 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) {
var (
his = NewHistogram(HistogramOpts{Name: "test_histogram"})
sum = NewSummary(SummaryOpts{Name: "test_summary"})
gauge = NewGauge(GaugeOpts{Name: "test_gauge"})
)
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func() {
hisTimer := NewTimer(his)
sumTimer := NewTimer(sum)
gaugeTimer := NewTimer(ObserverFunc(gauge.Set))
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defer hisTimer.ObserveDuration()
defer sumTimer.ObserveDuration()
defer gaugeTimer.ObserveDuration()
}()
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m := &dto.Metric{}
his.Write(m)
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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(nil)
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emptyTimer.ObserveDuration()
// Do nothing, just demonstrate it works without panic.
}
func TestTimerConditionalTiming(t *testing.T) {
var (
his = NewHistogram(HistogramOpts{
Name: "test_histogram",
})
timeMe = true
m = &dto.Metric{}
)
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timedFunc := func() {
timer := NewTimer(ObserverFunc(func(v float64) {
if timeMe {
his.Observe(v)
}
}))
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defer timer.ObserveDuration()
}
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timedFunc() // This will time.
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his.Write(m)
if want, got := uint64(1), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for histogram, got %d", want, got)
}
timeMe = false
timedFunc() // This will not time again.
m.Reset()
his.Write(m)
if want, got := uint64(1), m.GetHistogram().GetSampleCount(); want != got {
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t.Errorf("want %d observations for histogram, got %d", want, got)
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}
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}
func TestTimerByOutcome(t *testing.T) {
var (
his = NewHistogramVec(
HistogramOpts{Name: "test_histogram"},
[]string{"outcome"},
)
outcome = "foo"
m = &dto.Metric{}
)
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timedFunc := func() {
timer := NewTimer(ObserverFunc(func(v float64) {
his.WithLabelValues(outcome).Observe(v)
}))
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defer timer.ObserveDuration()
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if outcome == "foo" {
outcome = "bar"
return
}
outcome = "foo"
}
timedFunc()
his.WithLabelValues("foo").(Histogram).Write(m)
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if want, got := uint64(0), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for 'foo' histogram, got %d", want, got)
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}
m.Reset()
his.WithLabelValues("bar").(Histogram).Write(m)
if want, got := uint64(1), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for 'bar' histogram, got %d", want, got)
}
timedFunc()
m.Reset()
his.WithLabelValues("foo").(Histogram).Write(m)
if want, got := uint64(1), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for 'foo' histogram, got %d", want, got)
}
m.Reset()
his.WithLabelValues("bar").(Histogram).Write(m)
if want, got := uint64(1), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for 'bar' histogram, got %d", want, got)
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}
timedFunc()
m.Reset()
his.WithLabelValues("foo").(Histogram).Write(m)
if want, got := uint64(1), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for 'foo' histogram, got %d", want, got)
}
m.Reset()
his.WithLabelValues("bar").(Histogram).Write(m)
if want, got := uint64(2), m.GetHistogram().GetSampleCount(); want != got {
t.Errorf("want %d observations for 'bar' histogram, got %d", want, got)
}
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}