mirror of
https://github.com/etcd-io/etcd.git
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2030ca202f
Make raftIndex section to be expected raftIndex of next entry. It makes filename more intuitive and straight-forward. The commit also adds comments for filename format.
344 lines
7.4 KiB
Go
344 lines
7.4 KiB
Go
/*
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Copyright 2014 CoreOS Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package wal
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"path"
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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 (
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infoData = []byte("\b\xef\xfd\x02")
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infoRecord = append([]byte("\x0e\x00\x00\x00\x00\x00\x00\x00\b\x01\x10\x99\xb5\xe4\xd0\x03\x1a\x04"), infoData...)
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firstWalName = "0000000000000000-0000000000000001.wal"
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)
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func TestNew(t *testing.T) {
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p, err := ioutil.TempDir(os.TempDir(), "waltest")
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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(p)
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w, err := Create(p)
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if err != nil {
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t.Fatalf("err = %v, want nil", err)
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}
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if g := path.Base(w.f.Name()); g != firstWalName {
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t.Errorf("name = %+v, want %+v", g, firstWalName)
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}
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w.Close()
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}
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func TestNewForInitedDir(t *testing.T) {
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p, err := ioutil.TempDir(os.TempDir(), "waltest")
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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(p)
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os.Create(path.Join(p, firstWalName))
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if _, err = Create(p); err == nil || err != os.ErrExist {
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t.Errorf("err = %v, want %v", err, os.ErrExist)
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}
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}
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func TestOpenAtIndex(t *testing.T) {
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dir, err := ioutil.TempDir(os.TempDir(), "waltest")
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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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f, err := os.Create(path.Join(dir, firstWalName))
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if err != nil {
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t.Fatal(err)
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}
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f.Close()
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w, err := OpenAtIndex(dir, 1)
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if err != nil {
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t.Fatalf("err = %v, want nil", err)
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}
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if g := path.Base(w.f.Name()); g != firstWalName {
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t.Errorf("name = %+v, want %+v", g, firstWalName)
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}
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w.Close()
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wname := fmt.Sprintf("%016x-%016x.wal", 2, 10)
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f, err = os.Create(path.Join(dir, wname))
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if err != nil {
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t.Fatal(err)
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}
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f.Close()
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w, err = OpenAtIndex(dir, 5)
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if err != nil {
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t.Fatalf("err = %v, want nil", err)
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}
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if g := path.Base(w.f.Name()); g != wname {
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t.Errorf("name = %+v, want %+v", g, wname)
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}
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w.Close()
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emptydir, err := ioutil.TempDir(os.TempDir(), "waltestempty")
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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(emptydir)
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if _, err = OpenAtIndex(emptydir, 0); err != ErrNotFound {
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t.Errorf("err = %v, want %v", err, ErrNotFound)
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}
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}
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func TestCut(t *testing.T) {
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p, err := ioutil.TempDir(os.TempDir(), "waltest")
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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(p)
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w, err := Create(p)
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if err != nil {
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t.Fatal(err)
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}
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defer w.Close()
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if err := w.Cut(0); err != nil {
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t.Fatal(err)
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}
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wname := fmt.Sprintf("%016x-%016x.wal", 1, 1)
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if g := path.Base(w.f.Name()); g != wname {
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t.Errorf("name = %s, want %s", g, wname)
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}
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e := &raftpb.Entry{Index: 1, Term: 1, Data: []byte{1}}
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if err := w.SaveEntry(e); err != nil {
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t.Fatal(err)
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}
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if err := w.Cut(1); err != nil {
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t.Fatal(err)
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}
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wname = fmt.Sprintf("%016x-%016x.wal", 2, 2)
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if g := path.Base(w.f.Name()); g != wname {
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t.Errorf("name = %s, want %s", g, wname)
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}
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}
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func TestRecover(t *testing.T) {
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p, err := ioutil.TempDir(os.TempDir(), "waltest")
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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(p)
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w, err := Create(p)
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if err != nil {
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t.Fatal(err)
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}
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i := &raftpb.Info{Id: int64(0xBAD0)}
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if err = w.SaveInfo(i); err != nil {
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t.Fatal(err)
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}
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ents := []raftpb.Entry{{Index: 1, Term: 1, Data: []byte{1}}, {Index: 2, Term: 2, Data: []byte{2}}}
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for _, e := range ents {
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if err = w.SaveEntry(&e); err != nil {
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t.Fatal(err)
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}
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}
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sts := []raftpb.State{{Term: 1, Vote: 1, Commit: 1}, {Term: 2, Vote: 2, Commit: 2}}
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for _, s := range sts {
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if err = w.SaveState(&s); err != nil {
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t.Fatal(err)
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}
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}
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w.Close()
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if w, err = OpenAtIndex(p, 1); err != nil {
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t.Fatal(err)
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}
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id, state, entries, err := w.ReadAll()
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if err != nil {
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t.Fatal(err)
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}
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if id != i.Id {
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t.Errorf("id = %d, want %d", id, i.Id)
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}
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if !reflect.DeepEqual(entries, ents) {
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t.Errorf("ents = %+v, want %+v", entries, ents)
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}
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// only the latest state is recorded
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s := sts[len(sts)-1]
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if !reflect.DeepEqual(state, s) {
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t.Errorf("state = %+v, want %+v", state, s)
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}
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}
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func TestSearchIndex(t *testing.T) {
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tests := []struct {
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names []string
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index int64
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widx int
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wok bool
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}{
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{
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[]string{
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"0000000000000000-0000000000000000.wal",
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"0000000000000001-0000000000001000.wal",
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"0000000000000002-0000000000002000.wal",
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},
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0x1000, 1, true,
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},
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{
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[]string{
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"0000000000000001-0000000000004000.wal",
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"0000000000000002-0000000000003000.wal",
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"0000000000000003-0000000000005000.wal",
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},
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0x4000, 1, true,
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},
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{
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[]string{
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"0000000000000001-0000000000002000.wal",
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"0000000000000002-0000000000003000.wal",
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"0000000000000003-0000000000005000.wal",
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},
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0x1000, -1, false,
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},
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}
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for i, tt := range tests {
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idx, ok := searchIndex(tt.names, tt.index)
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if idx != tt.widx {
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t.Errorf("#%d: idx = %d, want %d", i, idx, tt.widx)
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}
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if ok != tt.wok {
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t.Errorf("#%d: ok = %v, want %v", i, ok, tt.wok)
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}
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}
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}
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func TestScanWalName(t *testing.T) {
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tests := []struct {
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str string
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wseq, windex int64
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wok bool
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}{
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{"0000000000000000-0000000000000000.wal", 0, 0, true},
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{"0000000000000000.wal", 0, 0, false},
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{"0000000000000000-0000000000000000.snap", 0, 0, false},
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}
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for i, tt := range tests {
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s, index, err := parseWalName(tt.str)
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if g := err == nil; g != tt.wok {
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t.Errorf("#%d: ok = %v, want %v", i, g, tt.wok)
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}
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if s != tt.wseq {
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t.Errorf("#%d: seq = %d, want %d", i, s, tt.wseq)
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}
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if index != tt.windex {
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t.Errorf("#%d: index = %d, want %d", i, index, tt.windex)
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}
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}
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}
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func TestRecoverAfterCut(t *testing.T) {
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p, err := ioutil.TempDir(os.TempDir(), "waltest")
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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(p)
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w, err := Create(p)
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if err != nil {
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t.Fatal(err)
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}
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info := &raftpb.Info{Id: int64(0xBAD1)}
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if err = w.SaveInfo(info); err != nil {
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t.Fatal(err)
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}
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if err = w.Cut(0); err != nil {
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t.Fatal(err)
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}
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for i := 1; i < 10; i++ {
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e := raftpb.Entry{Index: int64(i)}
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if err = w.SaveEntry(&e); err != nil {
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t.Fatal(err)
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}
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if err = w.Cut(e.Index); err != nil {
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t.Fatal(err)
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}
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if err = w.SaveInfo(info); err != nil {
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t.Fatal(err)
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}
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}
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w.Close()
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if err := os.Remove(path.Join(p, "0000000000000004-0000000000000004.wal")); err != nil {
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t.Fatal(err)
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}
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for i := 0; i < 10; i++ {
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w, err := OpenAtIndex(p, int64(i))
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if err != nil {
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if i <= 4 {
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if err != ErrNotFound {
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t.Errorf("#%d: err = %v, want %v", i, err, ErrNotFound)
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}
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} else {
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t.Errorf("#%d: err = %v, want nil", i, err)
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}
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continue
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}
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id, _, entries, err := w.ReadAll()
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if err != nil {
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t.Errorf("#%d: err = %v, want nil", i, err)
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continue
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}
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if id != info.Id {
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t.Errorf("#%d: id = %d, want %d", i, id, info.Id)
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}
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for j, e := range entries {
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if e.Index != int64(j+i) {
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t.Errorf("#%d: ents[%d].Index = %+v, want %+v", i, j, e.Index, j+i+1)
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}
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}
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}
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}
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func TestSaveEmpty(t *testing.T) {
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var buf bytes.Buffer
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var est raftpb.State
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w := WAL{
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encoder: newEncoder(&buf, 0),
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}
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if err := w.SaveState(&est); err != nil {
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t.Errorf("err = %v, want nil", err)
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}
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if len(buf.Bytes()) != 0 {
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t.Errorf("buf.Bytes = %d, want 0", len(buf.Bytes()))
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}
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}
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