mirror of
https://github.com/prometheus/statsd_exporter.git
synced 2025-01-21 20:08:07 +00:00
272 lines
7.4 KiB
Go
272 lines
7.4 KiB
Go
// Copyright 2013 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package event
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import (
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"reflect"
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"testing"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/statsd_exporter/pkg/clock"
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"github.com/prometheus/statsd_exporter/pkg/mapper"
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)
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var eventsFlushed = prometheus.NewCounter(
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prometheus.CounterOpts{
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Name: "statsd_exporter_event_queue_flushed_total",
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Help: "Number of times events were flushed to exporter",
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},
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)
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func TestEventThresholdFlush(t *testing.T) {
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c := make(chan Events, 100)
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// We're not going to flush during this test, so the duration doesn't matter.
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eq := NewEventQueue(c, 5, time.Second, eventsFlushed)
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e := make(Events, 13)
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go func() {
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eq.Queue(e)
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}()
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batch := <-c
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if len(batch) != 5 {
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t.Fatalf("Expected event batch to be 5 elements, but got %v", len(batch))
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}
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batch = <-c
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if len(batch) != 5 {
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t.Fatalf("Expected event batch to be 5 elements, but got %v", len(batch))
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}
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batch = <-c
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if len(batch) != 3 {
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t.Fatalf("Expected event batch to be 3 elements, but got %v", len(batch))
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}
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}
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func TestEventIntervalFlush(t *testing.T) {
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// Mock a time.NewTicker
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tickerCh := make(chan time.Time)
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clock.ClockInstance = &clock.Clock{
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TickerCh: tickerCh,
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}
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clock.ClockInstance.Instant = time.Unix(0, 0)
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c := make(chan Events, 100)
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eq := NewEventQueue(c, 1000, time.Second*1000, eventsFlushed)
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e := make(Events, 10)
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eq.Queue(e)
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if eq.Len() != 10 {
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t.Fatal("Expected 10 events to be queued, but got", eq.Len())
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}
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if len(eq.C) != 0 {
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t.Fatal("Expected 0 events in the event channel, but got", len(eq.C))
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}
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// Tick time forward to trigger a flush
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clock.ClockInstance.Instant = time.Unix(10000, 0)
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clock.ClockInstance.TickerCh <- time.Unix(10000, 0)
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events := <-eq.C
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if eq.Len() != 0 {
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t.Fatal("Expected 0 events to be queued, but got", eq.Len())
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}
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if len(events) != 10 {
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t.Fatal("Expected 10 events in the event channel, but got", len(events))
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}
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}
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func TestMultiValueEvent(t *testing.T) {
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tests := []struct {
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name string
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event MultiValueEvent
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wantValues []float64
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wantName string
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wantType mapper.MetricType
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wantLabels map[string]string
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}{
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{
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name: "MultiObserverEvent with single value",
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event: &MultiObserverEvent{
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OMetricName: "test_metric",
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OValues: []float64{1.0},
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OLabels: map[string]string{"label": "value"},
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SampleRate: 0,
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},
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wantValues: []float64{1.0},
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wantName: "test_metric",
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wantType: mapper.MetricTypeObserver,
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wantLabels: map[string]string{"label": "value"},
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},
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{
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name: "MultiObserverEvent with multiple values",
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event: &MultiObserverEvent{
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OMetricName: "test_metric",
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OValues: []float64{1.0, 2.0, 3.0},
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OLabels: map[string]string{"label": "value"},
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SampleRate: 0.5,
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},
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wantValues: []float64{1.0, 2.0, 3.0},
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wantName: "test_metric",
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wantType: mapper.MetricTypeObserver,
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wantLabels: map[string]string{"label": "value"},
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},
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{
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name: "CounterEvent implements MultiValueEvent",
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event: &CounterEvent{
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CMetricName: "test_counter",
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CValue: 42.0,
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CLabels: map[string]string{"label": "value"},
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},
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wantValues: []float64{42.0},
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wantName: "test_counter",
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wantType: mapper.MetricTypeCounter,
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wantLabels: map[string]string{"label": "value"},
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},
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{
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name: "GaugeEvent implements MultiValueEvent",
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event: &GaugeEvent{
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GMetricName: "test_gauge",
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GValue: 123.0,
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GLabels: map[string]string{"label": "value"},
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},
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wantValues: []float64{123.0},
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wantName: "test_gauge",
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wantType: mapper.MetricTypeGauge,
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wantLabels: map[string]string{"label": "value"},
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},
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{
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name: "ObserverEvent implements MultiValueEvent",
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event: &ObserverEvent{
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OMetricName: "test_observer",
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OValue: 99.0,
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OLabels: map[string]string{"label": "value"},
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},
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wantValues: []float64{99.0},
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wantName: "test_observer",
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wantType: mapper.MetricTypeObserver,
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wantLabels: map[string]string{"label": "value"},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := tt.event.Values(); !reflect.DeepEqual(got, tt.wantValues) {
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t.Errorf("MultiValueEvent.Values() = %v, want %v", got, tt.wantValues)
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}
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if got := tt.event.MetricName(); got != tt.wantName {
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t.Errorf("MultiValueEvent.MetricName() = %v, want %v", got, tt.wantName)
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}
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if got := tt.event.MetricType(); got != tt.wantType {
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t.Errorf("MultiValueEvent.MetricType() = %v, want %v", got, tt.wantType)
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}
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if got := tt.event.Labels(); !reflect.DeepEqual(got, tt.wantLabels) {
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t.Errorf("MultiValueEvent.Labels() = %v, want %v", got, tt.wantLabels)
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}
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})
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}
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}
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func TestMultiObserverEvent_Expand(t *testing.T) {
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tests := []struct {
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name string
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event *MultiObserverEvent
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wantEvents []Event
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}{
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{
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name: "single value no sampling",
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event: &MultiObserverEvent{
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OMetricName: "test_metric",
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OValues: []float64{1.0},
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OLabels: map[string]string{"label": "value"},
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SampleRate: 0,
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},
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wantEvents: []Event{
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&MultiObserverEvent{
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OMetricName: "test_metric",
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OValues: []float64{1.0},
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OLabels: map[string]string{"label": "value"},
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SampleRate: 0,
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},
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},
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},
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{
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name: "multiple values no sampling",
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event: &MultiObserverEvent{
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OMetricName: "test_metric",
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OValues: []float64{1.0, 2.0, 3.0},
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OLabels: map[string]string{"label": "value"},
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SampleRate: 0,
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},
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wantEvents: []Event{
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&ObserverEvent{
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OMetricName: "test_metric",
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OValue: 1.0,
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OLabels: map[string]string{"label": "value"},
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},
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&ObserverEvent{
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OMetricName: "test_metric",
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OValue: 2.0,
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OLabels: map[string]string{"label": "value"},
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},
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&ObserverEvent{
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OMetricName: "test_metric",
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OValue: 3.0,
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OLabels: map[string]string{"label": "value"},
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},
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},
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},
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{
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name: "multiple values with sampling",
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event: &MultiObserverEvent{
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OMetricName: "test_metric",
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OValues: []float64{1.0, 2.0},
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OLabels: map[string]string{"label": "value"},
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SampleRate: 0.5,
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},
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wantEvents: []Event{
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&ObserverEvent{
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OMetricName: "test_metric",
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OValue: 1.0,
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OLabels: map[string]string{"label": "value"},
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},
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&ObserverEvent{
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OMetricName: "test_metric",
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OValue: 2.0,
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OLabels: map[string]string{"label": "value"},
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},
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&ObserverEvent{
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OMetricName: "test_metric",
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OValue: 1.0,
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OLabels: map[string]string{"label": "value"},
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},
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&ObserverEvent{
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OMetricName: "test_metric",
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OValue: 2.0,
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OLabels: map[string]string{"label": "value"},
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},
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got := tt.event.Expand()
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if !reflect.DeepEqual(got, tt.wantEvents) {
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t.Errorf("MultiObserverEvent.Expand() = %v, want %v", got, tt.wantEvents)
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}
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})
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}
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}
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