github.com/googgoog/go-ethereum@v1.9.7/light/trie_test.go (about)

     1  // Copyright 2017 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package light
    18  
    19  import (
    20  	"bytes"
    21  	"context"
    22  	"fmt"
    23  	"testing"
    24  
    25  	"github.com/davecgh/go-spew/spew"
    26  	"github.com/ethereum/go-ethereum/consensus/ethash"
    27  	"github.com/ethereum/go-ethereum/core"
    28  	"github.com/ethereum/go-ethereum/core/rawdb"
    29  	"github.com/ethereum/go-ethereum/core/state"
    30  	"github.com/ethereum/go-ethereum/core/vm"
    31  	"github.com/ethereum/go-ethereum/params"
    32  	"github.com/ethereum/go-ethereum/trie"
    33  )
    34  
    35  func TestNodeIterator(t *testing.T) {
    36  	var (
    37  		fulldb  = rawdb.NewMemoryDatabase()
    38  		lightdb = rawdb.NewMemoryDatabase()
    39  		gspec   = core.Genesis{Alloc: core.GenesisAlloc{testBankAddress: {Balance: testBankFunds}}}
    40  		genesis = gspec.MustCommit(fulldb)
    41  	)
    42  	gspec.MustCommit(lightdb)
    43  	blockchain, _ := core.NewBlockChain(fulldb, nil, params.TestChainConfig, ethash.NewFullFaker(), vm.Config{}, nil)
    44  	gchain, _ := core.GenerateChain(params.TestChainConfig, genesis, ethash.NewFaker(), fulldb, 4, testChainGen)
    45  	if _, err := blockchain.InsertChain(gchain); err != nil {
    46  		panic(err)
    47  	}
    48  
    49  	ctx := context.Background()
    50  	odr := &testOdr{sdb: fulldb, ldb: lightdb, indexerConfig: TestClientIndexerConfig}
    51  	head := blockchain.CurrentHeader()
    52  	lightTrie, _ := NewStateDatabase(ctx, head, odr).OpenTrie(head.Root)
    53  	fullTrie, _ := state.NewDatabase(fulldb).OpenTrie(head.Root)
    54  	if err := diffTries(fullTrie, lightTrie); err != nil {
    55  		t.Fatal(err)
    56  	}
    57  }
    58  
    59  func diffTries(t1, t2 state.Trie) error {
    60  	i1 := trie.NewIterator(t1.NodeIterator(nil))
    61  	i2 := trie.NewIterator(t2.NodeIterator(nil))
    62  	for i1.Next() && i2.Next() {
    63  		if !bytes.Equal(i1.Key, i2.Key) {
    64  			spew.Dump(i2)
    65  			return fmt.Errorf("tries have different keys %x, %x", i1.Key, i2.Key)
    66  		}
    67  		if !bytes.Equal(i1.Value, i2.Value) {
    68  			return fmt.Errorf("tries differ at key %x", i1.Key)
    69  		}
    70  	}
    71  	switch {
    72  	case i1.Err != nil:
    73  		return fmt.Errorf("full trie iterator error: %v", i1.Err)
    74  	case i2.Err != nil:
    75  		return fmt.Errorf("light trie iterator error: %v", i1.Err)
    76  	case i1.Next():
    77  		return fmt.Errorf("full trie iterator has more k/v pairs")
    78  	case i2.Next():
    79  		return fmt.Errorf("light trie iterator has more k/v pairs")
    80  	}
    81  	return nil
    82  }