etcd/snap/snapshotter_test.go
2014-09-03 09:20:09 -07:00

124 lines
2.4 KiB
Go

package snap
import (
"fmt"
"hash/crc32"
"io/ioutil"
"os"
"path"
"reflect"
"testing"
"github.com/coreos/etcd/raft"
)
var testSnap = &raft.Snapshot{
ClusterId: 0xBEEF,
Data: []byte("some snapshot"),
Nodes: []int64{1, 2, 3},
Index: 1,
Term: 1,
}
func TestSaveAndLoad(t *testing.T) {
dir := path.Join(os.TempDir(), "snapshot")
os.Mkdir(dir, 0700)
defer os.RemoveAll(dir)
ss := New(dir)
err := ss.Save(testSnap)
if err != nil {
t.Fatal(err)
}
g, err := ss.Load()
if err != nil {
t.Errorf("err = %v, want nil", err)
}
if !reflect.DeepEqual(g, testSnap) {
t.Errorf("snap = %#v, want %#v", g, testSnap)
}
}
func TestBadCRC(t *testing.T) {
dir := path.Join(os.TempDir(), "snapshot")
os.Mkdir(dir, 0700)
defer os.RemoveAll(dir)
ss := New(dir)
err := ss.Save(testSnap)
if err != nil {
t.Fatal(err)
}
defer func() { crcTable = crc32.MakeTable(crc32.Castagnoli) }()
// switch to use another crc table
// fake a crc mismatch
crcTable = crc32.MakeTable(crc32.Koopman)
_, err = ss.Load()
if err == nil || err != ErrCRCMismatch {
t.Errorf("err = %v, want %v", err, ErrCRCMismatch)
}
}
func TestFailback(t *testing.T) {
dir := path.Join(os.TempDir(), "snapshot")
os.Mkdir(dir, 0700)
defer os.RemoveAll(dir)
large := fmt.Sprintf("%016x%016x%016x.snap", 0xFFFF, 0xFFFF, 0xFFFF)
err := ioutil.WriteFile(path.Join(dir, large), []byte("bad data"), 0666)
if err != nil {
t.Fatal(err)
}
ss := New(dir)
err = ss.Save(testSnap)
if err != nil {
t.Fatal(err)
}
g, err := ss.Load()
if err != nil {
t.Errorf("err = %v, want nil", err)
}
if !reflect.DeepEqual(g, testSnap) {
t.Errorf("snap = %#v, want %#v", g, testSnap)
}
}
func TestLoadNewestSnap(t *testing.T) {
dir := path.Join(os.TempDir(), "snapshot")
os.Mkdir(dir, 0700)
defer os.RemoveAll(dir)
ss := New(dir)
err := ss.Save(testSnap)
if err != nil {
t.Fatal(err)
}
newSnap := *testSnap
newSnap.Index = 5
err = ss.Save(&newSnap)
if err != nil {
t.Fatal(err)
}
g, err := ss.Load()
if err != nil {
t.Errorf("err = %v, want nil", err)
}
if !reflect.DeepEqual(g, &newSnap) {
t.Errorf("snap = %#v, want %#v", g, &newSnap)
}
}
func TestNoSnapshot(t *testing.T) {
dir := path.Join(os.TempDir(), "snapshot")
os.Mkdir(dir, 0700)
defer os.RemoveAll(dir)
ss := New(dir)
_, err := ss.Load()
if err == nil || err != ErrNoSnapshot {
t.Errorf("err = %v, want %v", err, ErrNoSnapshot)
}
}