Function TestMaxBackups

lumberjack_test.go:196–319

(t *testing.T)

}

func TestMaxBackups(t *testing.T) {
	currentTime = fakeTime
	megabyte = 1
	dir := makeTempDir("TestMaxBackups", t)
	defer os.RemoveAll(dir)

	filename := logFile(dir)
	l := &Logger{
		Filename:   filename,
		MaxSize:    10,
		MaxBackups: 1,
	}
	defer l.Close()
	b := []byte("boo!")
	n, err := l.Write(b)
	isNil(err, t)
	equals(len(b), n, t)

	existsWithContent(filename, b, t)
	fileCount(dir, 1, t)

	newFakeTime()

	// this will put us over the max
	b2 := []byte("foooooo!")
	n, err = l.Write(b2)
	isNil(err, t)
	equals(len(b2), n, t)

	// this will use the new fake time
	secondFilename := backupFile(dir)
	existsWithContent(secondFilename, b, t)

	// make sure the old file still exists with the same content.
	existsWithContent(filename, b2, t)

	fileCount(dir, 2, t)

	newFakeTime()

	// this will make us rotate again
	b3 := []byte("baaaaaar!")
	n, err = l.Write(b3)
	isNil(err, t)
	equals(len(b3), n, t)

	// this will use the new fake time
	thirdFilename := backupFile(dir)
	existsWithContent(thirdFilename, b2, t)

	existsWithContent(filename, b3, t)

	// we need to wait a little bit since the files get deleted on a different
	// goroutine.
	<-time.After(time.Millisecond * 10)

	// should only have two files in the dir still
	fileCount(dir, 2, t)