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// Copyright 2020 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 promlog
import (
"fmt"
"testing"
"github.com/go-kit/log/level"
"gopkg.in/yaml.v2"
)
// Make sure creating and using a logger with an empty configuration doesn't
// result in a panic.
func TestDefaultConfig(t *testing.T) {
logger := New(&Config{})
if err := logger.Log("hello", "world"); err != nil {
t.Fatal(err)
}
}
func TestUnmarshallLevel(t *testing.T) {
l := &AllowedLevel{}
err := yaml.Unmarshal([]byte(`debug`), l)
if err != nil {
t.Error(err)
}
if l.s != "debug" {
t.Errorf("expected %s, got %s", "debug", l.s)
}
}
func TestUnmarshallEmptyLevel(t *testing.T) {
l := &AllowedLevel{}
err := yaml.Unmarshal([]byte(``), l)
if err != nil {
t.Error(err)
}
if l.s != "" {
t.Errorf("expected empty level, got %s", l.s)
}
}
func TestUnmarshallBadLevel(t *testing.T) {
l := &AllowedLevel{}
err := yaml.Unmarshal([]byte(`debugg`), l)
if err == nil {
t.Error("expected error")
}
expErr := `unrecognized log level "debugg"`
if err.Error() != expErr {
t.Errorf("expected error %s, got %s", expErr, err.Error())
}
if l.s != "" {
t.Errorf("expected empty level, got %s", l.s)
}
}
type recordKeyvalLogger struct {
count int
}
func (r *recordKeyvalLogger) Log(keyvals ...interface{}) error {
for _, v := range keyvals {
if fmt.Sprintf("%v", v) == "Log level changed" {
return nil
}
}
r.count++
return nil
}
func TestDynamic(t *testing.T) {
logger := NewDynamic(&Config{})
debugLevel := &AllowedLevel{}
if err := debugLevel.Set("debug"); err != nil {
t.Fatal(err)
}
infoLevel := &AllowedLevel{}
if err := infoLevel.Set("info"); err != nil {
t.Fatal(err)
}
recorder := &recordKeyvalLogger{}
logger.base = recorder
logger.SetLevel(debugLevel)
if err := level.Debug(logger).Log("hello", "world"); err != nil {
t.Fatal(err)
}
if recorder.count != 1 {
t.Fatal("log not found")
}
recorder.count = 0
logger.SetLevel(infoLevel)
if err := level.Debug(logger).Log("hello", "world"); err != nil {
t.Fatal(err)
}
if recorder.count != 0 {
t.Fatal("log found")
}
if err := level.Info(logger).Log("hello", "world"); err != nil {
t.Fatal(err)
}
if recorder.count != 1 {
t.Fatal("log not found")
}
if err := level.Debug(logger).Log("hello", "world"); err != nil {
t.Fatal(err)
}
if recorder.count != 1 {
t.Fatal("extra log found")
}
}
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