94 lines
2.7 KiB
Go
94 lines
2.7 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package state
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import (
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/rawdb"
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)
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// Tests that the node iterator indeed walks over the entire database contents.
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func TestNodeIteratorCoverage(t *testing.T) {
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// Create some arbitrary test state to iterate
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db, sdb, root, _ := makeTestState()
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sdb.TrieDB().Commit(root, false)
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state, err := New(root, sdb, nil)
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if err != nil {
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t.Fatalf("failed to create state trie at %x: %v", root, err)
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}
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// Gather all the node hashes found by the iterator
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hashes := make(map[common.Hash]struct{})
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for it := NewNodeIterator(state); it.Next(); {
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if it.Hash != (common.Hash{}) {
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hashes[it.Hash] = struct{}{}
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}
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}
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// Check in-disk nodes
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var (
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seenNodes = make(map[common.Hash]struct{})
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seenCodes = make(map[common.Hash]struct{})
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)
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it := db.NewIterator(nil, nil)
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for it.Next() {
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ok, hash := isTrieNode(sdb.TrieDB().Scheme(), it.Key(), it.Value())
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if !ok {
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continue
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}
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seenNodes[hash] = struct{}{}
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}
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it.Release()
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// Check in-disk codes
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it = db.NewIterator(nil, nil)
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for it.Next() {
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ok, hash := rawdb.IsCodeKey(it.Key())
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if !ok {
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continue
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}
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if _, ok := hashes[common.BytesToHash(hash)]; !ok {
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t.Errorf("state entry not reported %x", it.Key())
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}
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seenCodes[common.BytesToHash(hash)] = struct{}{}
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}
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it.Release()
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// Cross check the iterated hashes and the database/nodepool content
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for hash := range hashes {
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_, ok := seenNodes[hash]
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if !ok {
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_, ok = seenCodes[hash]
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}
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if !ok {
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t.Errorf("failed to retrieve reported node %x", hash)
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}
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}
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}
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// isTrieNode is a helper function which reports if the provided
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// database entry belongs to a trie node or not.
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func isTrieNode(scheme string, key, val []byte) (bool, common.Hash) {
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if scheme == rawdb.HashScheme {
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if len(key) == common.HashLength {
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return true, common.BytesToHash(key)
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}
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}
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return false, common.Hash{}
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}
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