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package log_test
import (
"bytes"
"io"
"os"
"testing"
"github.com/go-kit/log"
)
func TestSwapLogger(t *testing.T) {
t.Parallel()
var logger log.SwapLogger
// Zero value does not panic or error.
err := logger.Log("k", "v")
if got, want := err, error(nil); got != want {
t.Errorf("got %v, want %v", got, want)
}
buf := &bytes.Buffer{}
json := log.NewJSONLogger(buf)
logger.Swap(json)
if err := logger.Log("k", "v"); err != nil {
t.Error(err)
}
if got, want := buf.String(), `{"k":"v"}`+"\n"; got != want {
t.Errorf("got %v, want %v", got, want)
}
buf.Reset()
prefix := log.NewLogfmtLogger(buf)
logger.Swap(prefix)
if err := logger.Log("k", "v"); err != nil {
t.Error(err)
}
if got, want := buf.String(), "k=v\n"; got != want {
t.Errorf("got %v, want %v", got, want)
}
buf.Reset()
logger.Swap(nil)
if err := logger.Log("k", "v"); err != nil {
t.Error(err)
}
if got, want := buf.String(), ""; got != want {
t.Errorf("got %v, want %v", got, want)
}
}
func TestSwapLoggerConcurrency(t *testing.T) {
t.Parallel()
testConcurrency(t, &log.SwapLogger{}, 10000)
}
func TestSyncLoggerConcurrency(t *testing.T) {
var w io.Writer //lint:ignore S1021 I prefer this
w = &bytes.Buffer{}
logger := log.NewLogfmtLogger(w)
logger = log.NewSyncLogger(logger)
testConcurrency(t, logger, 10000)
}
func TestSyncWriterConcurrency(t *testing.T) {
var w io.Writer
w = &bytes.Buffer{}
w = log.NewSyncWriter(w)
testConcurrency(t, log.NewLogfmtLogger(w), 10000)
}
func TestSyncWriterFd(t *testing.T) {
_, ok := log.NewSyncWriter(os.Stdout).(interface {
Fd() uintptr
})
if !ok {
t.Error("NewSyncWriter does not pass through Fd method")
}
}
func TestSyncLoggerPanic(t *testing.T) {
var logger log.Logger
logger = log.LoggerFunc(func(...interface{}) error { panic("!") })
logger = log.NewSyncLogger(logger)
f := func() {
defer func() {
if x := recover(); x != nil {
t.Log(x)
}
}()
logger.Log("hello", "world")
}
f()
f() // without defer Unlock, this one can deadlock
}
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