github.com/core-coin/go-core/v2@v2.1.9/core/state/iterator_test.go (about)

     1  // Copyright 2016 by the Authors
     2  // This file is part of the go-core library.
     3  //
     4  // The go-core 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-core 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-core library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package state
    18  
    19  import (
    20  	"bytes"
    21  	"testing"
    22  
    23  	"github.com/core-coin/go-core/v2/xcbdb"
    24  
    25  	"github.com/core-coin/go-core/v2/common"
    26  )
    27  
    28  // Tests that the node iterator indeed walks over the entire database contents.
    29  func TestNodeIteratorCoverage(t *testing.T) {
    30  	// Create some arbitrary test state to iterate
    31  	db, root, _ := makeTestState()
    32  	db.TrieDB().Commit(root, false, nil)
    33  
    34  	state, err := New(root, db, nil)
    35  	if err != nil {
    36  		t.Fatalf("failed to create state trie at %x: %v", root, err)
    37  	}
    38  	// Gather all the node hashes found by the iterator
    39  	hashes := make(map[common.Hash]struct{})
    40  	for it := NewNodeIterator(state); it.Next(); {
    41  		if it.Hash != (common.Hash{}) {
    42  			hashes[it.Hash] = struct{}{}
    43  		}
    44  	}
    45  	// Cross check the iterated hashes and the database/nodepool content
    46  	for hash := range hashes {
    47  		if _, err = db.TrieDB().Node(hash); err != nil {
    48  			_, err = db.ContractCode(common.Hash{}, hash)
    49  		}
    50  		if err != nil {
    51  			t.Errorf("failed to retrieve reported node %x", hash)
    52  		}
    53  	}
    54  	for _, hash := range db.TrieDB().Nodes() {
    55  		if _, ok := hashes[hash]; !ok {
    56  			t.Errorf("state entry not reported %x", hash)
    57  		}
    58  	}
    59  	it := db.TrieDB().DiskDB().(xcbdb.Database).NewIterator(nil, nil)
    60  	for it.Next() {
    61  		key := it.Key()
    62  		if bytes.HasPrefix(key, []byte("secure-key-")) {
    63  			continue
    64  		}
    65  		if _, ok := hashes[common.BytesToHash(key)]; !ok {
    66  			t.Errorf("state entry not reported %x", key)
    67  		}
    68  	}
    69  	it.Release()
    70  }