func TestDefaultFormat(t *testing.T) {
buf := bytes.NewBuffer(make([]byte, 4096))
log.SetWriter(buf)
msg := "this is a test message"
log.Info(msg)
if ok, _ := regexp.Match(`\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2} -? ?info test/deeper/log_test.go:\d+ this is a test message`, buf.Bytes()); !ok {
t.Logf("%s", buf.Bytes()) // 2016-01-24 19:41:19 info test/deeper/log_test.go:16 this is a test message
t.FailNow()
}
}
func TestSetFormatFile(t *testing.T) {
format := fmt.Sprintf(`<log><date>%s</date><time>%s</time><level>%s</level><file>%s</file><line>%d</line><msg>%s</msg><log>`,
"2006-01-02", "15:04:05.000", log.LevelToken, log.PackageToken, log.LineToken, log.MessageToken)
log.SetFormat(format)
buf := bytes.NewBuffer(make([]byte, 4096))
log.SetWriter(buf)
rand := time.Now().String()
log.Debug(rand)
if bytes.HasPrefix(buf.Bytes(), ([]byte)("<file>github.com/gotips/log/test/deeper/log_test.go</file>")) {
t.FailNow()
}
}
func xTestPrint(t *testing.T) {
file, err := os.OpenFile("test.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
if err != nil {
t.Error(err)
t.FailNow()
}
log.SetWriter(file)
for i := 0; i < 100e4; i++ {
if i%1e4 == 0 {
fmt.Println(i)
}
log.Info("can't load package: package lib: cannot find package `xxx` in any of")
}
}
func execChangeWriterExample() {
// 改变 Writer，把日志打印到缓冲区，也可以打印到文件，定时切换文件，可以实现日志滚动
buf := bytes.NewBuffer(make([]byte, 255))
log.SetWriter(buf)
log.Infof(msgFmt, 15)
// 查看缓冲区
// 每条日志结尾会加一个换行符
line, err := buf.ReadString('\n')
if err != nil {
fmt.Println(err) // 这里不能再调用 log.Error()
os.Exit(1)
}
fmt.Print(line)
}