path: root/p2p/enode/localnode_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 enode

import (
    "testing"

    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/p2p/enr"
)

func newLocalNodeForTesting() (*LocalNode, *DB) {
    db, _ := OpenDB("")
    key, _ := crypto.GenerateKey()
    return NewLocalNode(db, key), db
}

func TestLocalNode(t *testing.T) {
    ln, db := newLocalNodeForTesting()
    defer db.Close()

    if ln.Node().ID() != ln.ID() {
        t.Fatal("inconsistent ID")
    }

    ln.Set(enr.WithEntry("x", uint(3)))
    var x uint
    if err := ln.Node().Load(enr.WithEntry("x", &x)); err != nil {
        t.Fatal("can't load entry 'x':", err)
    } else if x != 3 {
        t.Fatal("wrong value for entry 'x':", x)
    }
}

func TestLocalNodeSeqPersist(t *testing.T) {
    ln, db := newLocalNodeForTesting()
    defer db.Close()

    if s := ln.Node().Seq(); s != 1 {
        t.Fatalf("wrong initial seq %d, want 1", s)
    }
    ln.Set(enr.WithEntry("x", uint(1)))
    if s := ln.Node().Seq(); s != 2 {
        t.Fatalf("wrong seq %d after set, want 2", s)
    }

    // Create a new instance, it should reload the sequence number.
    // The number increases just after that because a new record is
    // created without the "x" entry.
    ln2 := NewLocalNode(db, ln.key)
    if s := ln2.Node().Seq(); s != 3 {
        t.Fatalf("wrong seq %d on new instance, want 3", s)
    }

    // Create a new instance with a different node key on the same database.
    // This should reset the sequence number.
    key, _ := crypto.GenerateKey()
    ln3 := NewLocalNode(db, key)
    if s := ln3.Node().Seq(); s != 1 {
        t.Fatalf("wrong seq %d on instance with changed key, want 1", s)
    }
}