func TestNewDiskStorage1(t *testing.T) {
	clearAndInitDir()
	store, err := NewDiskStorage(tempDataDir, 1)
	assert.Nil(t, err)
	assert.Equal(t, len(store.Segments), 0)
	store.Close()
}
case1: new dist storage with no file
package storage
import (
	"testing"
	"github.com/stretchr/testify/assert"
)