statsd_exporter/mapper_test.go

142 lines
3.2 KiB
Go

// Copyright 2013 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 main
import (
"testing"
)
func TestMetricMapper(t *testing.T) {
scenarios := []struct {
config string
configBad bool
mappings map[string]map[string]string
}{
// Empty config.
{},
// Config with several mapping definitions.
{
config: `
test.dispatcher.*.*.*
name="dispatch_events"
processor="$1"
action="$2"
result="$3"
job="test_dispatcher"
*.*
name="catchall"
first="$1"
second="$2"
third="$3"
job="$1-$2-$3"
`,
mappings: map[string]map[string]string{
"test.dispatcher.FooProcessor.send.succeeded": map[string]string{
"name": "dispatch_events",
"processor": "FooProcessor",
"action": "send",
"result": "succeeded",
"job": "test_dispatcher",
},
"foo.bar": map[string]string{
"name": "catchall",
"first": "foo",
"second": "bar",
"third": "",
"job": "foo-bar-",
},
"foo.bar.baz": map[string]string{},
},
},
// Config with bad regex reference.
{
config: `
test.*
name="name"
label="$1_foo"
`,
mappings: map[string]map[string]string{
"test.a": map[string]string{
"name": "name",
"label": "",
},
},
},
// Config with good regex reference.
{
config: `
test.*
name="name"
label="${1}_foo"
`,
mappings: map[string]map[string]string{
"test.a": map[string]string{
"name": "name",
"label": "a_foo",
},
},
},
// Config with bad metric line.
{
config: `
bad-metric-line.*.*
name="foo"
`,
configBad: true,
},
// Config with bad label line.
{
config: `
test.*.*
name=foo
`,
configBad: true,
},
// Config with bad metric name.
{
config: `
test.*.*
name="0foo"
`,
configBad: true,
},
}
mapper := metricMapper{}
for i, scenario := range scenarios {
err := mapper.initFromString(scenario.config)
if err != nil && !scenario.configBad {
t.Fatalf("%d. Config load error: %s", i, err)
}
if err == nil && scenario.configBad {
t.Fatalf("%d. Expected bad config, but loaded ok", i)
}
for metric, mapping := range scenario.mappings {
labels, present := mapper.getMapping(metric)
if len(labels) == 0 && present {
t.Fatalf("%d.%q: Expected metric to not be present", i, metric)
}
if len(labels) != len(mapping) {
t.Fatalf("%d.%q: Expected %d labels, got %d", i, metric, len(mapping), len(labels))
}
for label, value := range labels {
if mapping[label] != value {
t.Fatalf("%d.%q: Expected labels %v, got %v", i, metric, mapping, labels)
}
}
}
}
}