telegraf/plugins/outputs/prometheus_client/prometheus_client_test.go

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package prometheus_client
import (
"testing"
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"time"
"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/internal"
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"github.com/influxdata/telegraf/plugins/inputs/prometheus"
"github.com/influxdata/telegraf/testutil"
)
var pTesting *PrometheusClient
func TestPrometheusWritePointEmptyTag(t *testing.T) {
if testing.Short() {
t.Skip("Skipping integration test in short mode")
}
pClient, p, err := setupPrometheus()
require.NoError(t, err)
defer pClient.Stop()
now := time.Now()
tags := make(map[string]string)
pt1, _ := telegraf.NewMetric(
"test_point_1",
tags,
map[string]interface{}{"value": 0.0},
now)
pt2, _ := telegraf.NewMetric(
"test_point_2",
tags,
map[string]interface{}{"value": 1.0},
now)
var metrics = []telegraf.Metric{
pt1,
pt2,
}
require.NoError(t, pClient.Write(metrics))
expected := []struct {
name string
value float64
tags map[string]string
}{
{"test_point_1", 0.0, tags},
{"test_point_2", 1.0, tags},
}
var acc testutil.Accumulator
require.NoError(t, p.Gather(&acc))
for _, e := range expected {
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acc.AssertContainsFields(t, e.name,
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map[string]interface{}{"value": e.value})
}
tags = make(map[string]string)
tags["testtag"] = "testvalue"
pt3, _ := telegraf.NewMetric(
"test_point_3",
tags,
map[string]interface{}{"value": 0.0},
now)
pt4, _ := telegraf.NewMetric(
"test_point_4",
tags,
map[string]interface{}{"value": 1.0},
now)
metrics = []telegraf.Metric{
pt3,
pt4,
}
require.NoError(t, pClient.Write(metrics))
expected2 := []struct {
name string
value float64
}{
{"test_point_3", 0.0},
{"test_point_4", 1.0},
}
require.NoError(t, p.Gather(&acc))
for _, e := range expected2 {
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acc.AssertContainsFields(t, e.name,
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map[string]interface{}{"value": e.value})
}
}
func TestPrometheusExpireOldMetrics(t *testing.T) {
if testing.Short() {
t.Skip("Skipping integration test in short mode")
}
pClient, p, err := setupPrometheus()
pClient.ExpirationInterval = internal.Duration{Duration: time.Second * 10}
require.NoError(t, err)
defer pClient.Stop()
now := time.Now()
tags := make(map[string]string)
pt1, _ := telegraf.NewMetric(
"test_point_1",
tags,
map[string]interface{}{"value": 0.0},
now)
var metrics = []telegraf.Metric{pt1}
require.NoError(t, pClient.Write(metrics))
for _, m := range pClient.metrics {
m.Expiration = now.Add(time.Duration(-15) * time.Second)
}
pt2, _ := telegraf.NewMetric(
"test_point_2",
tags,
map[string]interface{}{"value": 1.0},
now)
var metrics2 = []telegraf.Metric{pt2}
require.NoError(t, pClient.Write(metrics2))
expected := []struct {
name string
value float64
tags map[string]string
}{
{"test_point_2", 1.0, tags},
}
var acc testutil.Accumulator
require.NoError(t, p.Gather(&acc))
for _, e := range expected {
acc.AssertContainsFields(t, e.name,
map[string]interface{}{"value": e.value})
}
acc.AssertDoesNotContainMeasurement(t, "test_point_1")
// Confirm that it's not in the PrometheusClient map anymore
assert.Equal(t, 1, len(pClient.metrics))
}
func setupPrometheus() (*PrometheusClient, *prometheus.Prometheus, error) {
if pTesting == nil {
pTesting = &PrometheusClient{Listen: "localhost:9127"}
err := pTesting.Start()
if err != nil {
return nil, nil, err
}
} else {
pTesting.metrics = make(map[string]*MetricWithExpiration)
}
time.Sleep(time.Millisecond * 200)
p := &prometheus.Prometheus{
Urls: []string{"http://localhost:9127/metrics"},
}
return pTesting, p, nil
}