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// Copyright (C) 2014 Jakob Borg. All rights reserved. Use of this source code
// is governed by an MIT-style license that can be found in the LICENSE file.
package logger
import (
"bytes"
"fmt"
"io"
"log"
"strings"
"testing"
"time"
)
func TestAPI(t *testing.T) {
l := New()
l.SetFlags(0)
l.SetPrefix("testing")
debug := 0
l.AddHandler(LevelDebug, checkFunc(t, LevelDebug, &debug))
info := 0
l.AddHandler(LevelInfo, checkFunc(t, LevelInfo, &info))
warn := 0
l.AddHandler(LevelWarn, checkFunc(t, LevelWarn, &warn))
l.Debugf("test %d", 0)
l.Debugln("test", 0)
l.Infof("test %d", 1)
l.Infoln("test", 1)
l.Warnf("test %d", 3)
l.Warnln("test", 3)
if debug != 6 {
t.Errorf("Debug handler called %d != 8 times", debug)
}
if info != 4 {
t.Errorf("Info handler called %d != 6 times", info)
}
if warn != 2 {
t.Errorf("Warn handler called %d != 2 times", warn)
}
}
func checkFunc(t *testing.T, expectl LogLevel, counter *int) func(LogLevel, string) {
return func(l LogLevel, msg string) {
*counter++
if l < expectl {
t.Errorf("Incorrect message level %d < %d", l, expectl)
}
}
}
func TestFacilityDebugging(t *testing.T) {
l := New()
l.SetFlags(0)
msgs := 0
l.AddHandler(LevelDebug, func(l LogLevel, msg string) {
msgs++
if strings.Contains(msg, "f1") {
t.Fatal("Should not get message for facility f1")
}
})
f0 := l.NewFacility("f0", "foo#0")
f1 := l.NewFacility("f1", "foo#1")
l.SetDebug("f0", true)
l.SetDebug("f1", false)
f0.Debugln("Debug line from f0")
f1.Debugln("Debug line from f1")
if msgs != 1 {
t.Fatalf("Incorrect number of messages, %d != 1", msgs)
}
}
func TestRecorder(t *testing.T) {
l := New()
l.SetFlags(0)
// Keep the last five warnings or higher, no special initial handling.
r0 := NewRecorder(l, LevelWarn, 5, 0)
// Keep the last ten infos or higher, with the first three being permanent.
r1 := NewRecorder(l, LevelInfo, 10, 3)
// Log a bunch of messages.
for i := 0; i < 15; i++ {
l.Debugf("Debug#%d", i)
l.Infof("Info#%d", i)
l.Warnf("Warn#%d", i)
}
// r0 should contain the last five warnings
lines := r0.Since(time.Time{})
if len(lines) != 5 {
t.Fatalf("Incorrect length %d != 5", len(lines))
}
for i := 0; i < 5; i++ {
expected := fmt.Sprintf("Warn#%d", i+10)
if lines[i].Message != expected {
t.Error("Incorrect warning in r0:", lines[i].Message, "!=", expected)
}
}
// r0 should contain:
// - The first three messages
// - A "..." marker
// - The last six messages
// (totalling ten)
lines = r1.Since(time.Time{})
if len(lines) != 10 {
t.Fatalf("Incorrect length %d != 10", len(lines))
}
expected := []string{
"Info#0",
"Warn#0",
"Info#1",
"...",
"Info#12",
"Warn#12",
"Info#13",
"Warn#13",
"Info#14",
"Warn#14",
}
for i := 0; i < 10; i++ {
if lines[i].Message != expected[i] {
t.Error("Incorrect warning in r0:", lines[i].Message, "!=", expected[i])
}
}
// Check that since works
now := time.Now()
time.Sleep(time.Millisecond)
lines = r1.Since(now)
if len(lines) != 0 {
t.Error("unexpected lines")
}
l.Infoln("hah")
lines = r1.Since(now)
if len(lines) != 1 {
t.Fatalf("unexpected line count: %d", len(lines))
}
if lines[0].Message != "hah" {
t.Errorf("incorrect line: %s", lines[0].Message)
}
}
func TestStackLevel(t *testing.T) {
b := new(bytes.Buffer)
l := newLogger(b)
l.SetFlags(log.Lshortfile)
l.Infoln("testing")
res := b.String()
if !strings.Contains(res, "logger_test.go:") {
t.Logf("%q", res)
t.Error("Should identify this file as the source (bad level?)")
}
}
func TestControlStripper(t *testing.T) {
b := new(bytes.Buffer)
l := newLogger(controlStripper{b})
l.Infoln("testing\x07testing\ntesting")
res := b.String()
if !strings.Contains(res, "testing testing\ntesting") {
t.Logf("%q", res)
t.Error("Control character should become space")
}
if strings.Contains(res, "\x07") {
t.Logf("%q", res)
t.Error("Control character should be removed")
}
}
func BenchmarkLog(b *testing.B) {
b.Skip()
l := newLogger(controlStripper{io.Discard})
benchmarkLogger(b, l)
}
func BenchmarkLogNoStripper(b *testing.B) {
b.Skip()
l := newLogger(io.Discard)
benchmarkLogger(b, l)
}
func benchmarkLogger(b *testing.B, l Logger) {
b.Skip()
l.SetFlags(log.Lshortfile | log.Lmicroseconds)
l.SetPrefix("ABCDEFG")
for i := 0; i < b.N; i++ {
l.Infoln("This is a somewhat representative log line")
l.Infof("This is a log line with a couple of formatted things: %d %q", 42, "a file name maybe, who knows?")
}
b.ReportAllocs()
b.SetBytes(2) // log entries per iteration
}
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