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// Copyright 2017 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package db
import (
"bytes"
"fmt"
"io/ioutil"
"math/rand"
"os"
"testing"
)
func TestBasic(t *testing.T) {
fn := tempFile(t)
defer os.Remove(fn)
db, err := Open(fn)
if err != nil {
t.Fatalf("failed to open db: %v", err)
}
if len(db.Records) != 0 {
t.Fatalf("empty db contains records")
}
db.Save("", nil, 0)
db.Save("1", []byte("ab"), 1)
db.Save("23", []byte("abcd"), 2)
checkContents := func(where string) {
if len(db.Records) != 3 {
t.Fatalf("bad record count %v %v, want 3", where, len(db.Records))
}
for key, rec := range db.Records {
switch key {
case "":
if len(rec.Val) == 0 && rec.Seq == 0 {
return
}
case "1":
if bytes.Equal(rec.Val, []byte("ab")) && rec.Seq == 1 {
return
}
case "23":
if bytes.Equal(rec.Val, []byte("abcd")) && rec.Seq == 2 {
return
}
default:
t.Fatalf("unknown key: %v", key)
}
t.Fatalf("bad record for key %v: %+v", key, rec)
}
}
checkContents("after save")
if err := db.Flush(); err != nil {
t.Fatalf("failed to flush db: %v", err)
}
checkContents("after flush")
db, err = Open(fn)
if err != nil {
t.Fatalf("failed to open db: %v", err)
}
checkContents("after reopen")
}
func TestModify(t *testing.T) {
fn := tempFile(t)
defer os.Remove(fn)
db, err := Open(fn)
if err != nil {
t.Fatalf("failed to open db: %v", err)
}
db.Save("1", []byte("ab"), 0)
db.Save("23", nil, 1)
db.Save("456", []byte("abcd"), 1)
db.Save("7890", []byte("a"), 0)
db.Delete("23")
db.Save("1", nil, 5)
db.Save("456", []byte("ef"), 6)
db.Delete("7890")
db.Save("456", []byte("efg"), 0)
db.Save("7890", []byte("bc"), 0)
checkContents := func(where string) {
if len(db.Records) != 3 {
t.Fatalf("bad record count %v %v, want 3", where, len(db.Records))
}
for key, rec := range db.Records {
switch key {
case "1":
if len(rec.Val) == 0 && rec.Seq == 5 {
return
}
case "456":
if bytes.Equal(rec.Val, []byte("efg")) && rec.Seq == 0 {
return
}
case "7890":
if bytes.Equal(rec.Val, []byte("bc")) && rec.Seq == 0 {
return
}
default:
t.Fatalf("unknown key: %v", key)
}
t.Fatalf("bad record for key %v: %+v", key, rec)
}
}
checkContents("after modification")
if err := db.Flush(); err != nil {
t.Fatalf("failed to flush db: %v", err)
}
checkContents("after flush")
db, err = Open(fn)
if err != nil {
t.Fatalf("failed to open db: %v", err)
}
checkContents("after reopen")
}
func TestLarge(t *testing.T) {
fn := tempFile(t)
defer os.Remove(fn)
db, err := Open(fn)
if err != nil {
t.Fatalf("failed to open db: %v", err)
}
const nrec = 1000
val := make([]byte, 1000)
for i := range val {
val[i] = byte(rand.Intn(256))
}
for i := 0; i < nrec; i++ {
db.Save(fmt.Sprintf("%v", i), val, 0)
}
if err := db.Flush(); err != nil {
t.Fatalf("failed to flush db: %v", err)
}
db, err = Open(fn)
if err != nil {
t.Fatalf("failed to open db: %v", err)
}
if len(db.Records) != nrec {
t.Fatalf("wrong record count: %v, want %v", len(db.Records), nrec)
}
}
func tempFile(t *testing.T) string {
f, err := ioutil.TempFile("", "syzkaller.test.db")
if err != nil {
t.Fatalf("failed to create temp file: %v", err)
}
f.Close()
return f.Name()
}
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