path: root/swarm/state/dbstore_test.go

// 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")
    }
}