forked from mirror/client_golang
309 lines
7.8 KiB
Go
309 lines
7.8 KiB
Go
// Copyright 2018 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 testutil
|
|
|
|
import (
|
|
"strings"
|
|
"testing"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
type untypedCollector struct{}
|
|
|
|
func (u untypedCollector) Describe(c chan<- *prometheus.Desc) {
|
|
c <- prometheus.NewDesc("name", "help", nil, nil)
|
|
}
|
|
|
|
func (u untypedCollector) Collect(c chan<- prometheus.Metric) {
|
|
c <- prometheus.MustNewConstMetric(
|
|
prometheus.NewDesc("name", "help", nil, nil),
|
|
prometheus.UntypedValue,
|
|
2001,
|
|
)
|
|
}
|
|
|
|
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,
|
|
panics: true,
|
|
},
|
|
"histogram vec with one element": {
|
|
collector: histogramVecWithOneElement,
|
|
panics: true,
|
|
},
|
|
}
|
|
|
|
for n, s := range scenarios {
|
|
t.Run(n, func(t *testing.T) {
|
|
defer func() {
|
|
r := recover()
|
|
if r == nil && s.panics {
|
|
t.Error("expected panic")
|
|
} else if r != nil && !s.panics {
|
|
t.Error("unexpected panic: ", r)
|
|
}
|
|
// Any other combination is the expected outcome.
|
|
}()
|
|
if got := ToFloat64(s.collector); got != s.want {
|
|
t.Errorf("want %f, got %f", s.want, got)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestCollectAndCompare(t *testing.T) {
|
|
const metadata = `
|
|
# HELP some_total A value that represents a counter.
|
|
# TYPE some_total counter
|
|
`
|
|
|
|
c := prometheus.NewCounter(prometheus.CounterOpts{
|
|
Name: "some_total",
|
|
Help: "A value that represents a counter.",
|
|
ConstLabels: prometheus.Labels{
|
|
"label1": "value1",
|
|
},
|
|
})
|
|
c.Inc()
|
|
|
|
expected := `
|
|
|
|
some_total{ label1 = "value1" } 1.0
|
|
`
|
|
|
|
if err := CollectAndCompare(c, strings.NewReader(metadata+expected), "some_total"); err != nil {
|
|
t.Errorf("unexpected collecting result:\n%s", err)
|
|
}
|
|
}
|
|
|
|
func TestCollectAndCompareNoLabel(t *testing.T) {
|
|
const metadata = `
|
|
# HELP some_total A value that represents a counter.
|
|
# TYPE some_total counter
|
|
`
|
|
|
|
c := prometheus.NewCounter(prometheus.CounterOpts{
|
|
Name: "some_total",
|
|
Help: "A value that represents a counter.",
|
|
})
|
|
c.Inc()
|
|
|
|
expected := `
|
|
|
|
some_total 1.0
|
|
`
|
|
|
|
if err := CollectAndCompare(c, strings.NewReader(metadata+expected), "some_total"); err != nil {
|
|
t.Errorf("unexpected collecting result:\n%s", err)
|
|
}
|
|
}
|
|
|
|
func TestCollectAndCompareHistogram(t *testing.T) {
|
|
inputs := []struct {
|
|
name string
|
|
c prometheus.Collector
|
|
metadata string
|
|
expect string
|
|
observation float64
|
|
}{
|
|
{
|
|
name: "Testing Histogram Collector",
|
|
c: prometheus.NewHistogram(prometheus.HistogramOpts{
|
|
Name: "some_histogram",
|
|
Help: "An example of a histogram",
|
|
Buckets: []float64{1, 2, 3},
|
|
}),
|
|
metadata: `
|
|
# HELP some_histogram An example of a histogram
|
|
# TYPE some_histogram histogram
|
|
`,
|
|
expect: `
|
|
some_histogram{le="1"} 0.0
|
|
some_histogram{le="2"} 0.0
|
|
some_histogram{le="3"} 1.0
|
|
some_histogram_bucket{le="+Inf"} 1.0
|
|
some_histogram_sum 2.5
|
|
some_histogram_count 1
|
|
|
|
`,
|
|
observation: 2.5,
|
|
},
|
|
{
|
|
name: "Testing HistogramVec Collector",
|
|
c: prometheus.NewHistogramVec(prometheus.HistogramOpts{
|
|
Name: "some_histogram",
|
|
Help: "An example of a histogram",
|
|
Buckets: []float64{1, 2, 3},
|
|
}, []string{"test"}),
|
|
|
|
metadata: `
|
|
# HELP some_histogram An example of a histogram
|
|
# TYPE some_histogram histogram
|
|
`,
|
|
expect: `
|
|
some_histogram_bucket{test="test",le="1"} 0.0
|
|
some_histogram_bucket{test="test",le="2"} 0.0
|
|
some_histogram_bucket{test="test",le="3"} 1.0
|
|
some_histogram_bucket{test="test",le="+Inf"} 1.0
|
|
some_histogram_sum{test="test"} 2.5
|
|
some_histogram_count{test="test"} 1.0
|
|
|
|
`,
|
|
observation: 2.5,
|
|
},
|
|
}
|
|
|
|
for _, input := range inputs {
|
|
switch collector := input.c.(type) {
|
|
case prometheus.Histogram:
|
|
collector.Observe(input.observation)
|
|
case *prometheus.HistogramVec:
|
|
collector.WithLabelValues("test").Observe(input.observation)
|
|
default:
|
|
t.Fatalf("unsuported collector tested")
|
|
|
|
}
|
|
|
|
t.Run(input.name, func(t *testing.T) {
|
|
if err := CollectAndCompare(input.c, strings.NewReader(input.metadata+input.expect)); err != nil {
|
|
t.Errorf("unexpected collecting result:\n%s", err)
|
|
}
|
|
})
|
|
|
|
}
|
|
}
|
|
|
|
func TestNoMetricFilter(t *testing.T) {
|
|
const metadata = `
|
|
# HELP some_total A value that represents a counter.
|
|
# TYPE some_total counter
|
|
`
|
|
|
|
c := prometheus.NewCounter(prometheus.CounterOpts{
|
|
Name: "some_total",
|
|
Help: "A value that represents a counter.",
|
|
ConstLabels: prometheus.Labels{
|
|
"label1": "value1",
|
|
},
|
|
})
|
|
c.Inc()
|
|
|
|
expected := `
|
|
some_total{label1="value1"} 1.0
|
|
`
|
|
|
|
if err := CollectAndCompare(c, strings.NewReader(metadata+expected)); err != nil {
|
|
t.Errorf("unexpected collecting result:\n%s", err)
|
|
}
|
|
}
|
|
|
|
func TestMetricNotFound(t *testing.T) {
|
|
const metadata = `
|
|
# HELP some_other_metric A value that represents a counter.
|
|
# TYPE some_other_metric counter
|
|
`
|
|
|
|
c := prometheus.NewCounter(prometheus.CounterOpts{
|
|
Name: "some_total",
|
|
Help: "A value that represents a counter.",
|
|
ConstLabels: prometheus.Labels{
|
|
"label1": "value1",
|
|
},
|
|
})
|
|
c.Inc()
|
|
|
|
expected := `
|
|
some_other_metric{label1="value1"} 1.0
|
|
`
|
|
|
|
expectedError := `
|
|
metric output does not match expectation; want:
|
|
|
|
# HELP some_other_metric A value that represents a counter.
|
|
# TYPE some_other_metric counter
|
|
some_other_metric{label1="value1"} 1.0
|
|
|
|
got:
|
|
|
|
# HELP some_total A value that represents a counter.
|
|
# TYPE some_total counter
|
|
some_total{label1="value1"} 1.0
|
|
`
|
|
|
|
err := CollectAndCompare(c, strings.NewReader(metadata+expected))
|
|
if err == nil {
|
|
t.Error("Expected error, got no error.")
|
|
}
|
|
|
|
if err.Error() != expectedError {
|
|
t.Errorf("Expected\n%#+v\nGot:\n%#+v", expectedError, err.Error())
|
|
}
|
|
}
|