231 lines
5.0 KiB
Go
231 lines
5.0 KiB
Go
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// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package raftsnap
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import (
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"fmt"
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"hash/crc32"
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"io/ioutil"
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"os"
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"path/filepath"
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"reflect"
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"testing"
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"github.com/coreos/etcd/raft/raftpb"
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)
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var testSnap = &raftpb.Snapshot{
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Data: []byte("some snapshot"),
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Metadata: raftpb.SnapshotMetadata{
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ConfState: raftpb.ConfState{
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Nodes: []uint64{1, 2, 3},
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},
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Index: 1,
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Term: 1,
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},
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}
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func TestSaveAndLoad(t *testing.T) {
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dir := filepath.Join(os.TempDir(), "snapshot")
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err := os.Mkdir(dir, 0700)
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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ss := New(dir)
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err = ss.save(testSnap)
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if err != nil {
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t.Fatal(err)
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}
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g, err := ss.Load()
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if err != nil {
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t.Errorf("err = %v, want nil", err)
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}
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if !reflect.DeepEqual(g, testSnap) {
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t.Errorf("snap = %#v, want %#v", g, testSnap)
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}
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}
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func TestBadCRC(t *testing.T) {
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dir := filepath.Join(os.TempDir(), "snapshot")
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err := os.Mkdir(dir, 0700)
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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ss := New(dir)
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err = ss.save(testSnap)
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if err != nil {
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t.Fatal(err)
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}
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defer func() { crcTable = crc32.MakeTable(crc32.Castagnoli) }()
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// switch to use another crc table
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// fake a crc mismatch
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crcTable = crc32.MakeTable(crc32.Koopman)
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_, err = Read(filepath.Join(dir, fmt.Sprintf("%016x-%016x.snap", 1, 1)))
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if err == nil || err != ErrCRCMismatch {
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t.Errorf("err = %v, want %v", err, ErrCRCMismatch)
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}
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}
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func TestFailback(t *testing.T) {
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dir := filepath.Join(os.TempDir(), "snapshot")
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err := os.Mkdir(dir, 0700)
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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large := fmt.Sprintf("%016x-%016x-%016x.snap", 0xFFFF, 0xFFFF, 0xFFFF)
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err = ioutil.WriteFile(filepath.Join(dir, large), []byte("bad data"), 0666)
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if err != nil {
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t.Fatal(err)
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}
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ss := New(dir)
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err = ss.save(testSnap)
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if err != nil {
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t.Fatal(err)
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}
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g, err := ss.Load()
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if err != nil {
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t.Errorf("err = %v, want nil", err)
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}
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if !reflect.DeepEqual(g, testSnap) {
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t.Errorf("snap = %#v, want %#v", g, testSnap)
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}
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if f, err := os.Open(filepath.Join(dir, large) + ".broken"); err != nil {
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t.Fatal("broken snapshot does not exist")
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} else {
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f.Close()
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}
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}
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func TestSnapNames(t *testing.T) {
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dir := filepath.Join(os.TempDir(), "snapshot")
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err := os.Mkdir(dir, 0700)
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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for i := 1; i <= 5; i++ {
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var f *os.File
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if f, err = os.Create(filepath.Join(dir, fmt.Sprintf("%d.snap", i))); err != nil {
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t.Fatal(err)
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} else {
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f.Close()
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}
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}
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ss := New(dir)
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names, err := ss.snapNames()
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if err != nil {
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t.Errorf("err = %v, want nil", err)
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}
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if len(names) != 5 {
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t.Errorf("len = %d, want 10", len(names))
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}
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w := []string{"5.snap", "4.snap", "3.snap", "2.snap", "1.snap"}
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if !reflect.DeepEqual(names, w) {
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t.Errorf("names = %v, want %v", names, w)
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}
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}
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func TestLoadNewestSnap(t *testing.T) {
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dir := filepath.Join(os.TempDir(), "snapshot")
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err := os.Mkdir(dir, 0700)
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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ss := New(dir)
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err = ss.save(testSnap)
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if err != nil {
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t.Fatal(err)
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}
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newSnap := *testSnap
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newSnap.Metadata.Index = 5
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err = ss.save(&newSnap)
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if err != nil {
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t.Fatal(err)
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}
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g, err := ss.Load()
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if err != nil {
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t.Errorf("err = %v, want nil", err)
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}
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if !reflect.DeepEqual(g, &newSnap) {
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t.Errorf("snap = %#v, want %#v", g, &newSnap)
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}
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}
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func TestNoSnapshot(t *testing.T) {
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dir := filepath.Join(os.TempDir(), "snapshot")
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err := os.Mkdir(dir, 0700)
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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ss := New(dir)
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_, err = ss.Load()
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if err != ErrNoSnapshot {
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t.Errorf("err = %v, want %v", err, ErrNoSnapshot)
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}
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}
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func TestEmptySnapshot(t *testing.T) {
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dir := filepath.Join(os.TempDir(), "snapshot")
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err := os.Mkdir(dir, 0700)
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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err = ioutil.WriteFile(filepath.Join(dir, "1.snap"), []byte(""), 0x700)
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if err != nil {
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t.Fatal(err)
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}
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_, err = Read(filepath.Join(dir, "1.snap"))
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if err != ErrEmptySnapshot {
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t.Errorf("err = %v, want %v", err, ErrEmptySnapshot)
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}
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}
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// TestAllSnapshotBroken ensures snapshotter returns
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// ErrNoSnapshot if all the snapshots are broken.
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func TestAllSnapshotBroken(t *testing.T) {
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dir := filepath.Join(os.TempDir(), "snapshot")
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err := os.Mkdir(dir, 0700)
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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err = ioutil.WriteFile(filepath.Join(dir, "1.snap"), []byte("bad"), 0x700)
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if err != nil {
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t.Fatal(err)
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}
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ss := New(dir)
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_, err = ss.Load()
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if err != ErrNoSnapshot {
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t.Errorf("err = %v, want %v", err, ErrNoSnapshot)
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}
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}
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