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