446 lines
9.6 KiB
Go
446 lines
9.6 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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"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"
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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("\n\x00\x00\x00\x00\x00\x00\x00\b\x01\x10\x00\x1a\x04"), infoData...)
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stateData = []byte("\b\x01\x10\x01\x18\x01")
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stateRecord = append([]byte("\f\x00\x00\x00\x00\x00\x00\x00\b\x03\x10\x00\x1a\x06"), stateData...)
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entryData = []byte("\b\x01\x10\x01\x18\x01\x22\x01\x01")
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entryRecord = append([]byte("\x0f\x00\x00\x00\x00\x00\x00\x00\b\x02\x10\x00\x1a\t"), entryData...)
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firstWalName = "0000000000000000-0000000000000000.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 TestAppend(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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w, err := Open(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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wname := fmt.Sprintf("%016x-%016x.wal", 2, 10)
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os.Create(path.Join(p, wname))
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w, err = Open(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 != 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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}
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func TestAppendForUninitedDir(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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if _, err = Open(p); 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, 0)
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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 := &raft.Entry{Type: 1, 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, 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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}
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func TestSaveEntry(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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e := &raft.Entry{Type: 1, Index: 1, Term: 1, Data: []byte{1}}
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err = w.SaveEntry(e)
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if err != nil {
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t.Fatal(err)
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}
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w.Close()
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b, err := ioutil.ReadFile(path.Join(p, firstWalName))
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(b, entryRecord) {
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t.Errorf("ent = %q, want %q", b, entryRecord)
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}
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}
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func TestSaveInfo(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 := &raft.Info{Id: int64(0xBEEF)}
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err = w.SaveInfo(i)
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if err != nil {
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t.Fatal(err)
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}
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// make sure we can only write info at the head of the wal file
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// still in buffer
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err = w.SaveInfo(i)
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if err == nil || err.Error() != "cannot write info at 18, expect 0" {
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t.Errorf("err = %v, want cannot write info at 18, expect 0", err)
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}
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// sync to disk
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w.Sync()
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err = w.SaveInfo(i)
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if err == nil || err.Error() != "cannot write info at 18, expect 0" {
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t.Errorf("err = %v, want cannot write info at 18, expect 0", err)
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}
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w.Close()
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b, err := ioutil.ReadFile(path.Join(p, firstWalName))
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(b, infoRecord) {
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t.Errorf("ent = %q, want %q", b, infoRecord)
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}
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}
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func TestSaveState(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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st := &raft.State{Term: 1, Vote: 1, Commit: 1}
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err = w.SaveState(st)
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if err != nil {
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t.Fatal(err)
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}
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w.Close()
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b, err := ioutil.ReadFile(path.Join(p, firstWalName))
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(b, stateRecord) {
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t.Errorf("ent = %q, want %q", b, stateRecord)
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}
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}
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func TestLoadInfo(t *testing.T) {
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i, err := loadInfo(infoData)
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if err != nil {
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t.Fatal(err)
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}
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if i.Id != 0xBEEF {
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t.Errorf("id = %x, want 0xBEEF", i.Id)
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}
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}
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func TestLoadEntry(t *testing.T) {
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e, err := loadEntry(entryData)
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if err != nil {
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t.Fatal(err)
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}
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we := raft.Entry{Type: 1, Index: 1, Term: 1, Data: []byte{1}}
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if !reflect.DeepEqual(e, we) {
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t.Errorf("ent = %v, want %v", e, we)
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}
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}
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func TestLoadState(t *testing.T) {
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s, err := loadState(stateData)
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if err != nil {
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t.Fatal(err)
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}
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ws := raft.State{Term: 1, Vote: 1, Commit: 1}
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if !reflect.DeepEqual(s, ws) {
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t.Errorf("state = %v, want %v", s, ws)
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}
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}
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func TestNodeLoad(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 := &raft.Info{Id: int64(0xBEEF)}
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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 := []raft.Entry{{Type: 1, Index: 1, Term: 1, Data: []byte{1}}, {Type: 2, 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 := []raft.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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n := newNode(0)
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if err := n.load(path.Join(p, firstWalName)); err != nil {
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t.Fatal(err)
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}
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if n.Id != i.Id {
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t.Errorf("id = %d, want %d", n.Id, i.Id)
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}
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if !reflect.DeepEqual(n.Ents, ents) {
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t.Errorf("ents = %+v, want %+v", n.Ents, 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(n.State, s) {
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t.Errorf("state = %+v, want %+v", n.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 TestRead(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 := &raft.Info{Id: int64(0xBEEF)}
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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 := raft.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, "0000000000000004-0000000000000003.wal")); err != nil {
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t.Fatal(err)
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}
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for i := 0; i < 15; i++ {
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n, err := Read(p, int64(i))
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if i <= 3 || i >= 10 {
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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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continue
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}
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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 n.Id != info.Id {
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t.Errorf("#%d: id = %d, want %d", n.Id, info.Id)
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}
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for j, e := range n.Ents {
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if e.Index != int64(j+i+1) {
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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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