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// Copyright (C) MongoDB, Inc. 2023-present.
//
// 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
package logger
import (
"bytes"
"encoding/json"
"fmt"
"os"
"reflect"
"sync"
"testing"
"go.mongodb.org/mongo-driver/internal/assert"
)
type mockLogSink struct{}
func (mockLogSink) Info(int, string, ...interface{}) {}
func (mockLogSink) Error(error, string, ...interface{}) {}
func BenchmarkLogger(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
b.Run("Print", func(b *testing.B) {
b.ReportAllocs()
b.ResetTimer()
logger, err := New(mockLogSink{}, 0, map[Component]Level{
ComponentCommand: LevelDebug,
})
if err != nil {
b.Fatal(err)
}
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
logger.Print(LevelInfo, ComponentCommand, "foo", "bar", "baz")
}
})
})
}
func mockKeyValues(length int) (KeyValues, map[string]interface{}) {
keysAndValues := KeyValues{}
m := map[string]interface{}{}
for i := 0; i < length; i++ {
keyName := fmt.Sprintf("key%d", i)
valueName := fmt.Sprintf("value%d", i)
keysAndValues.Add(keyName, valueName)
m[keyName] = valueName
}
return keysAndValues, m
}
func BenchmarkIOSinkInfo(b *testing.B) {
keysAndValues, _ := mockKeyValues(10)
b.ReportAllocs()
b.ResetTimer()
sink := NewIOSink(bytes.NewBuffer(nil))
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
sink.Info(0, "foo", keysAndValues...)
}
})
}
func TestIOSinkInfo(t *testing.T) {
t.Parallel()
const threshold = 1000
mockKeyValues, kvmap := mockKeyValues(10)
buf := new(bytes.Buffer)
sink := NewIOSink(buf)
wg := sync.WaitGroup{}
wg.Add(threshold)
for i := 0; i < threshold; i++ {
go func() {
defer wg.Done()
sink.Info(0, "foo", mockKeyValues...)
}()
}
wg.Wait()
dec := json.NewDecoder(buf)
for dec.More() {
var m map[string]interface{}
if err := dec.Decode(&m); err != nil {
t.Fatalf("error unmarshaling JSON: %v", err)
}
delete(m, KeyTimestamp)
delete(m, KeyMessage)
if !reflect.DeepEqual(m, kvmap) {
t.Fatalf("expected %v, got %v", kvmap, m)
}
}
}
func TestSelectMaxDocumentLength(t *testing.T) {
for _, tcase := range []struct {
name string
arg uint
expected uint
env map[string]string
}{
{
name: "default",
arg: 0,
expected: DefaultMaxDocumentLength,
},
{
name: "non-zero",
arg: 100,
expected: 100,
},
{
name: "valid env",
arg: 0,
expected: 100,
env: map[string]string{
maxDocumentLengthEnvVar: "100",
},
},
{
name: "invalid env",
arg: 0,
expected: DefaultMaxDocumentLength,
env: map[string]string{
maxDocumentLengthEnvVar: "foo",
},
},
} {
tcase := tcase
t.Run(tcase.name, func(t *testing.T) {
for k, v := range tcase.env {
t.Setenv(k, v)
}
actual := selectMaxDocumentLength(tcase.arg)
if actual != tcase.expected {
t.Errorf("expected %d, got %d", tcase.expected, actual)
}
})
}
}
func TestSelectLogSink(t *testing.T) {
for _, tcase := range []struct {
name string
arg LogSink
expected LogSink
env map[string]string
}{
{
name: "default",
arg: nil,
expected: NewIOSink(os.Stderr),
},
{
name: "non-nil",
arg: mockLogSink{},
expected: mockLogSink{},
},
{
name: "stdout",
arg: nil,
expected: NewIOSink(os.Stdout),
env: map[string]string{
logSinkPathEnvVar: logSinkPathStdout,
},
},
{
name: "stderr",
arg: nil,
expected: NewIOSink(os.Stderr),
env: map[string]string{
logSinkPathEnvVar: logSinkPathStderr,
},
},
} {
tcase := tcase
t.Run(tcase.name, func(t *testing.T) {
for k, v := range tcase.env {
t.Setenv(k, v)
}
actual, _, _ := selectLogSink(tcase.arg)
if !reflect.DeepEqual(actual, tcase.expected) {
t.Errorf("expected %+v, got %+v", tcase.expected, actual)
}
})
}
}
func TestSelectedComponentLevels(t *testing.T) {
for _, tcase := range []struct {
name string
arg map[Component]Level
expected map[Component]Level
env map[string]string
}{
{
name: "default",
arg: nil,
expected: map[Component]Level{
ComponentCommand: LevelOff,
ComponentTopology: LevelOff,
ComponentServerSelection: LevelOff,
ComponentConnection: LevelOff,
},
},
{
name: "non-nil",
arg: map[Component]Level{
ComponentCommand: LevelDebug,
},
expected: map[Component]Level{
ComponentCommand: LevelDebug,
ComponentTopology: LevelOff,
ComponentServerSelection: LevelOff,
ComponentConnection: LevelOff,
},
},
{
name: "valid env",
arg: nil,
expected: map[Component]Level{
ComponentCommand: LevelDebug,
ComponentTopology: LevelInfo,
ComponentServerSelection: LevelOff,
ComponentConnection: LevelOff,
},
env: map[string]string{
mongoDBLogCommandEnvVar: levelLiteralDebug,
mongoDBLogTopologyEnvVar: levelLiteralInfo,
},
},
{
name: "invalid env",
arg: nil,
expected: map[Component]Level{
ComponentCommand: LevelOff,
ComponentTopology: LevelOff,
ComponentServerSelection: LevelOff,
ComponentConnection: LevelOff,
},
env: map[string]string{
mongoDBLogCommandEnvVar: "foo",
mongoDBLogTopologyEnvVar: "bar",
},
},
} {
tcase := tcase
t.Run(tcase.name, func(t *testing.T) {
for k, v := range tcase.env {
t.Setenv(k, v)
}
actual := selectComponentLevels(tcase.arg)
for k, v := range tcase.expected {
if actual[k] != v {
t.Errorf("expected %d, got %d", v, actual[k])
}
}
})
}
}
func TestTruncate(t *testing.T) {
t.Parallel()
for _, tcase := range []struct {
name string
arg string
width uint
expected string
}{
{
name: "empty",
arg: "",
width: 0,
expected: "",
},
{
name: "short",
arg: "foo",
width: DefaultMaxDocumentLength,
expected: "foo",
},
{
name: "long",
arg: "foo bar baz",
width: 9,
expected: "foo bar b...",
},
{
name: "multi-byte",
arg: "你好",
width: 4,
expected: "你...",
},
} {
tcase := tcase
t.Run(tcase.name, func(t *testing.T) {
t.Parallel()
actual := truncate(tcase.arg, tcase.width)
if actual != tcase.expected {
t.Errorf("expected %q, got %q", tcase.expected, actual)
}
})
}
}
func TestLogger_LevelComponentEnabled(t *testing.T) {
t.Parallel()
tests := []struct {
name string
logger Logger
level Level
component Component
want bool
}{
{
name: "zero",
logger: Logger{},
level: LevelOff,
component: ComponentCommand,
want: false,
},
{
name: "empty",
logger: Logger{
ComponentLevels: map[Component]Level{},
},
level: LevelOff,
component: ComponentCommand,
want: false, // LevelOff should never be considered enabled.
},
{
name: "one level below",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentCommand: LevelDebug,
},
},
level: LevelInfo,
component: ComponentCommand,
want: true,
},
{
name: "equal levels",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentCommand: LevelDebug,
},
},
level: LevelDebug,
component: ComponentCommand,
want: true,
},
{
name: "one level above",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentCommand: LevelInfo,
},
},
level: LevelDebug,
component: ComponentCommand,
want: false,
},
{
name: "component mismatch",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentCommand: LevelDebug,
},
},
level: LevelDebug,
component: ComponentTopology,
want: false,
},
{
name: "component all enables with topology",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentAll: LevelDebug,
},
},
level: LevelDebug,
component: ComponentTopology,
want: true,
},
{
name: "component all enables with server selection",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentAll: LevelDebug,
},
},
level: LevelDebug,
component: ComponentServerSelection,
want: true,
},
{
name: "component all enables with connection",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentAll: LevelDebug,
},
},
level: LevelDebug,
component: ComponentConnection,
want: true,
},
{
name: "component all enables with command",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentAll: LevelDebug,
},
},
level: LevelDebug,
component: ComponentCommand,
want: true,
},
{
name: "component all enables with all",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentAll: LevelDebug,
},
},
level: LevelDebug,
component: ComponentAll,
want: true,
},
{
name: "component all does not enable with lower level",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentAll: LevelInfo,
},
},
level: LevelDebug,
component: ComponentCommand,
want: false,
},
{
name: "component all has a lower log level than command",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentAll: LevelInfo,
ComponentCommand: LevelDebug,
},
},
level: LevelDebug,
component: ComponentCommand,
want: true,
},
{
name: "component all has a higher log level than command",
logger: Logger{
ComponentLevels: map[Component]Level{
ComponentAll: LevelDebug,
ComponentCommand: LevelInfo,
},
},
level: LevelDebug,
component: ComponentCommand,
want: true,
},
}
for _, tcase := range tests {
tcase := tcase // Capture the range variable.
t.Run(tcase.name, func(t *testing.T) {
t.Parallel()
got := tcase.logger.LevelComponentEnabled(tcase.level, tcase.component)
assert.Equal(t, tcase.want, got, "unexpected result for LevelComponentEnabled")
})
}
}