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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package state
import (
"bytes"
"errors"
"io/ioutil"
"os"
"strings"
"testing"
)
var ErrInvalidArraySize = errors.New("invalid byte array size")
var ErrInvalidValuePersisted = errors.New("invalid value was persisted to the db")
type SerializingType struct {
key string
value string
}
func (st *SerializingType) MarshalBinary() (data []byte, err error) {
d := []byte(strings.Join([]string{st.key, st.value}, ";"))
return d, nil
}
func (st *SerializingType) UnmarshalBinary(data []byte) (err error) {
d := bytes.Split(data, []byte(";"))
l := len(d)
if l == 0 {
return ErrInvalidArraySize
}
if l == 2 {
keyLen := len(d[0])
st.key = string(d[0][:keyLen])
valLen := len(d[1])
st.value = string(d[1][:valLen])
}
return nil
}
// TestDBStore tests basic functionality of DBStore.
func TestDBStore(t *testing.T) {
dir, err := ioutil.TempDir("", "db_store_test")
if err != nil {
panic(err)
}
defer os.RemoveAll(dir)
store, err := NewDBStore(dir)
if err != nil {
t.Fatal(err)
}
testStore(t, store)
store.Close()
persistedStore, err := NewDBStore(dir)
if err != nil {
t.Fatal(err)
}
defer persistedStore.Close()
testPersistedStore(t, persistedStore)
}
func testStore(t *testing.T, store Store) {
ser := &SerializingType{key: "key1", value: "value1"}
jsonify := []string{"a", "b", "c"}
err := store.Put(ser.key, ser)
if err != nil {
t.Fatal(err)
}
err = store.Put("key2", jsonify)
if err != nil {
t.Fatal(err)
}
}
func testPersistedStore(t *testing.T, store Store) {
ser := &SerializingType{}
err := store.Get("key1", ser)
if err != nil {
t.Fatal(err)
}
if ser.key != "key1" || ser.value != "value1" {
t.Fatal(ErrInvalidValuePersisted)
}
as := []string{}
err = store.Get("key2", &as)
if err != nil {
t.Fatal(err)
}
if len(as) != 3 {
t.Fatalf("serialized array did not match expectation")
}
if as[0] != "a" || as[1] != "b" || as[2] != "c" {
t.Fatalf("elements serialized did not match expected values")
}
}
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