github.com/tirogen/go-ethereum@v1.10.12-0.20221226051715-250cfede41b6/core/state/iterator_test.go (about)

     1  // Copyright 2016 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 state
    18  
    19  import (
    20  	"bytes"
    21  	"testing"
    22  
    23  	"github.com/tirogen/go-ethereum/common"
    24  )
    25  
    26  // Tests that the node iterator indeed walks over the entire database contents.
    27  func TestNodeIteratorCoverage(t *testing.T) {
    28  	// Create some arbitrary test state to iterate
    29  	db, sdb, root, _ := makeTestState()
    30  	sdb.TrieDB().Commit(root, false, nil)
    31  
    32  	state, err := New(root, sdb, nil)
    33  	if err != nil {
    34  		t.Fatalf("failed to create state trie at %x: %v", root, err)
    35  	}
    36  	// Gather all the node hashes found by the iterator
    37  	hashes := make(map[common.Hash]struct{})
    38  	for it := NewNodeIterator(state); it.Next(); {
    39  		if it.Hash != (common.Hash{}) {
    40  			hashes[it.Hash] = struct{}{}
    41  		}
    42  	}
    43  	// Cross check the iterated hashes and the database/nodepool content
    44  	for hash := range hashes {
    45  		if _, err = sdb.TrieDB().Node(hash); err != nil {
    46  			_, err = sdb.ContractCode(common.Hash{}, hash)
    47  		}
    48  		if err != nil {
    49  			t.Errorf("failed to retrieve reported node %x", hash)
    50  		}
    51  	}
    52  	for _, hash := range sdb.TrieDB().Nodes() {
    53  		if _, ok := hashes[hash]; !ok {
    54  			t.Errorf("state entry not reported %x", hash)
    55  		}
    56  	}
    57  	it := db.NewIterator(nil, nil)
    58  	for it.Next() {
    59  		key := it.Key()
    60  		if bytes.HasPrefix(key, []byte("secure-key-")) {
    61  			continue
    62  		}
    63  		if _, ok := hashes[common.BytesToHash(key)]; !ok {
    64  			t.Errorf("state entry not reported %x", key)
    65  		}
    66  	}
    67  	it.Release()
    68  }