func TestRun(t *testing.T) {
err := os.MkdirAll(tmpdir, 0777)
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
t.Logf("tmp dir: %s", tmpdir)
sink, err := New(tmpdir+"test.log", time.Second*2, log.BasicFormat, log.BasicFields)
if err != nil {
t.Fatal(err)
}
defer sink.Close()
logger := log.New(sink)
go sink.Run() // start logrotate in a separate goroutine.
go func() {
for i := 0; i < 40; i++ {
logger.Infof("%x", rand.Int())
time.Sleep(time.Millisecond * 250)
}
sink.Stop() // stop the Run() method and end the test.
}()
select {
case err := <-sink.Error():
t.Error(err)
case <-sink.Done():
sink.Close()
}
}
func TestRotate(t *testing.T) {
err := os.MkdirAll(tmpdir, 0777)
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
t.Logf("tmp dir: %s", tmpdir)
sink, err := New(tmpdir+"test.log", time.Second*2, log.BasicFormat, log.BasicFields)
if err != nil {
t.Fatal(err)
}
defer sink.Close()
log.New(sink).Info("hello!")
// now rotate
if err = sink.Rotate(); err != nil {
t.Fatal(err)
}
// lets check if the rotated file exists
files, err := ioutil.ReadDir(tmpdir)
if err != nil {
t.Fatal(err)
}
if len(files) < 2 {
t.Fatalf("expected two files to be created")
}
file, err := os.Open(tmpdir + files[len(files)-1].Name())
if err != nil {
t.Fatal(err)
}
// compare the contents
b, err := ioutil.ReadAll(file)
if err != nil {
t.Fatal(err)
}
expected := fmt.Sprintf(log.BasicFormat, time.Now().Format(time.Stamp), log.INFO, "hello!")
if !bytes.Equal([]byte(expected), b) {
t.Fatalf("expected output to be %q, but intead got %q", expected, b)
}
}