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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 (
"fmt"
"math/rand"
"os"
"reflect"
"testing"
"github.com/google/syzkaller/pkg/osutil"
)
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)
want := map[string]Record{
"": {Val: nil, Seq: 0},
"1": {Val: []byte("ab"), Seq: 1},
"23": {Val: []byte("abcd"), Seq: 2},
}
if !reflect.DeepEqual(db.Records, want) {
t.Fatalf("bad db after save: %v, want: %v", db.Records, want)
}
if err := db.Flush(); err != nil {
t.Fatalf("failed to flush db: %v", err)
}
if !reflect.DeepEqual(db.Records, want) {
t.Fatalf("bad db after flush: %v, want: %v", db.Records, want)
}
db, err = Open(fn)
if err != nil {
t.Fatalf("failed to open db: %v", err)
}
if !reflect.DeepEqual(db.Records, want) {
t.Fatalf("bad db after reopen: %v, want: %v", db.Records, want)
}
}
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)
want := map[string]Record{
"1": {Val: nil, Seq: 5},
"456": {Val: []byte("efg"), Seq: 0},
"7890": {Val: []byte("bc"), Seq: 0},
}
if !reflect.DeepEqual(db.Records, want) {
t.Fatalf("bad db after modification: %v, want: %v", db.Records, want)
}
if err := db.Flush(); err != nil {
t.Fatalf("failed to flush db: %v", err)
}
if !reflect.DeepEqual(db.Records, want) {
t.Fatalf("bad db after flush: %v, want: %v", db.Records, want)
}
db, err = Open(fn)
if err != nil {
t.Fatalf("failed to open db: %v", err)
}
if !reflect.DeepEqual(db.Records, want) {
t.Fatalf("bad db after reopen: %v, want: %v", db.Records, want)
}
}
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 {
fn, err := osutil.TempFile("syzkaller.test.db")
if err != nil {
t.Fatal(err)
}
return fn
}
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