forked from mirrors/statsd_exporter
ab7c27ee77
Datadog's format extensions allow attaching labels and tags to statsd metrics, and are documented at http://docs.datadoghq.com/guides/dogstatsd/#datagram-format Additionally changes compare method in tests to reflect.DeepEqual, as the tag maps don't sort deterministically, corrects an inversion in displaying test failure cases, and treats an invalid sample value as 1 instead of throwing out the sample.
171 lines
3.8 KiB
Go
171 lines
3.8 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 main
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import (
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"reflect"
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"testing"
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)
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func TestHandlePacket(t *testing.T) {
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scenarios := []struct {
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name string
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in string
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out Events
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}{
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{
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name: "empty",
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}, {
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name: "simple counter",
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in: "foo:2|c",
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out: Events{
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&CounterEvent{
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metricName: "foo",
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value: 2,
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labels: map[string]string{},
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},
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},
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}, {
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name: "simple gauge",
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in: "foo:3|g",
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out: Events{
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&GaugeEvent{
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metricName: "foo",
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value: 3,
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labels: map[string]string{},
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},
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},
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}, {
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name: "simple timer",
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in: "foo:200|ms",
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out: Events{
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&TimerEvent{
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metricName: "foo",
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value: 200,
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labels: map[string]string{},
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},
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},
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}, {
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name: "datadog tag extension",
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in: "foo:100|c|#tag1:bar,tag2:baz,tag3,tag4",
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out: Events{
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&CounterEvent{
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metricName: "foo",
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value: 100,
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labels: map[string]string{"tag1": "bar", "tag2": "baz", "tag3": ".", "tag4": "."},
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},
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},
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}, {
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name: "datadog tag extension with sampling",
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in: "foo:100|c|@0.1|#tag1:bar,tag2,tag3:baz",
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out: Events{
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&CounterEvent{
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metricName: "foo",
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value: 1000,
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labels: map[string]string{"tag1": "bar", "tag2": ".", "tag3": "baz"},
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},
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},
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}, {
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name: "combined multiline metrics",
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in: "foo:200|ms:300|ms:5|c|@0.1:6|g\nbar:1|c:5|ms",
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out: Events{
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&TimerEvent{
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metricName: "foo",
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value: 200,
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labels: map[string]string{},
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},
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&TimerEvent{
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metricName: "foo",
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value: 300,
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labels: map[string]string{},
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},
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&CounterEvent{
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metricName: "foo",
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value: 50,
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labels: map[string]string{},
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},
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&GaugeEvent{
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metricName: "foo",
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value: 6,
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labels: map[string]string{},
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},
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&CounterEvent{
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metricName: "bar",
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value: 1,
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labels: map[string]string{},
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},
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&TimerEvent{
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metricName: "bar",
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value: 5,
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labels: map[string]string{},
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},
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},
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}, {
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name: "bad line",
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in: "foo",
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}, {
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name: "bad component",
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in: "foo:1",
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}, {
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name: "bad value",
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in: "foo:1o|c",
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}, {
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name: "illegal sampling factor",
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in: "foo:1|c|@bar",
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out: Events{
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&CounterEvent{
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metricName: "foo",
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value: 1,
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labels: map[string]string{},
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},
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},
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}, {
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name: "zero sampling factor",
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in: "foo:2|c|@0",
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out: Events{
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&CounterEvent{
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metricName: "foo",
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value: 2,
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labels: map[string]string{},
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},
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},
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}, {
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name: "illegal stat type",
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in: "foo:2|t",
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},
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}
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l := StatsDListener{}
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events := make(chan Events, 32)
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for i, scenario := range scenarios {
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l.handlePacket([]byte(scenario.in), events)
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// Flatten actual events.
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actual := Events{}
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for i := 0; i < len(events); i++ {
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actual = append(actual, <-events...)
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}
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if len(actual) != len(scenario.out) {
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t.Fatalf("%d. Expected %d events, got %d in scenario '%s'", i, len(scenario.out), len(actual), scenario.name)
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}
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for j, expected := range scenario.out {
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if !reflect.DeepEqual(&expected, &actual[j]) {
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t.Fatalf("%d.%d. Expected %#v, got %#v in scenario '%s'", i, j, expected, actual[j], scenario.name)
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}
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}
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}
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}
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