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// Copyright 2017 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 light
import (
"bytes"
"context"
"fmt"
"testing"
"github.com/davecgh/go-spew/spew"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
)
func TestNodeIterator(t *testing.T) {
var (
fulldb, _ = ethdb.NewMemDatabase()
lightdb, _ = ethdb.NewMemDatabase()
gspec = core.Genesis{Alloc: core.GenesisAlloc{testBankAddress: {Balance: testBankFunds}}}
genesis = gspec.MustCommit(fulldb)
)
gspec.MustCommit(lightdb)
blockchain, _ := core.NewBlockChain(fulldb, nil, params.TestChainConfig, ethash.NewFullFaker(), vm.Config{})
gchain, _ := core.GenerateChain(params.TestChainConfig, genesis, ethash.NewFaker(), fulldb, 4, testChainGen)
if _, err := blockchain.InsertChain(gchain); err != nil {
panic(err)
}
ctx := context.Background()
odr := &testOdr{sdb: fulldb, ldb: lightdb}
head := blockchain.CurrentHeader()
lightTrie, _ := NewStateDatabase(ctx, head, odr).OpenTrie(head.Root)
fullTrie, _ := state.NewDatabase(fulldb).OpenTrie(head.Root)
if err := diffTries(fullTrie, lightTrie); err != nil {
t.Fatal(err)
}
}
func diffTries(t1, t2 state.Trie) error {
i1 := trie.NewIterator(t1.NodeIterator(nil))
i2 := trie.NewIterator(t2.NodeIterator(nil))
for i1.Next() && i2.Next() {
if !bytes.Equal(i1.Key, i2.Key) {
spew.Dump(i2)
return fmt.Errorf("tries have different keys %x, %x", i1.Key, i2.Key)
}
if !bytes.Equal(i2.Value, i2.Value) {
return fmt.Errorf("tries differ at key %x", i1.Key)
}
}
switch {
case i1.Err != nil:
return fmt.Errorf("full trie iterator error: %v", i1.Err)
case i2.Err != nil:
return fmt.Errorf("light trie iterator error: %v", i1.Err)
case i1.Next():
return fmt.Errorf("full trie iterator has more k/v pairs")
case i2.Next():
return fmt.Errorf("light trie iterator has more k/v pairs")
}
return nil
}
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