github.com/neatlab/neatio@v1.7.3-0.20220425043230-d903e92fcc75/chain/trie/sync_test.go

package trie

import (
	"bytes"
	"testing"

	"github.com/neatlab/neatio/neatdb/memorydb"
	"github.com/neatlab/neatio/utilities/common"
)

func makeTestTrie() (*Database, *Trie, map[string][]byte) {

	triedb := NewDatabase(memorydb.New())
	trie, _ := New(common.Hash{}, triedb)

	content := make(map[string][]byte)
	for i := byte(0); i < 255; i++ {

		key, val := common.LeftPadBytes([]byte{1, i}, 32), []byte{i}
		content[string(key)] = val
		trie.Update(key, val)

		key, val = common.LeftPadBytes([]byte{2, i}, 32), []byte{i}
		content[string(key)] = val
		trie.Update(key, val)

		for j := byte(3); j < 13; j++ {
			key, val = common.LeftPadBytes([]byte{j, i}, 32), []byte{j, i}
			content[string(key)] = val
			trie.Update(key, val)
		}
	}
	trie.Commit(nil)

	return triedb, trie, content
}

func checkTrieContents(t *testing.T, db *Database, root []byte, content map[string][]byte) {

	trie, err := New(common.BytesToHash(root), db)
	if err != nil {
		t.Fatalf("failed to create trie at %x: %v", root, err)
	}
	if err := checkTrieConsistency(db, common.BytesToHash(root)); err != nil {
		t.Fatalf("inconsistent trie at %x: %v", root, err)
	}
	for key, val := range content {
		if have := trie.Get([]byte(key)); !bytes.Equal(have, val) {
			t.Errorf("entry %x: content mismatch: have %x, want %x", key, have, val)
		}
	}
}

func checkTrieConsistency(db *Database, root common.Hash) error {

	trie, err := New(root, db)
	if err != nil {
		return nil
	}
	it := trie.NodeIterator(nil)
	for it.Next(true) {
	}
	return it.Error()
}

func TestEmptySync(t *testing.T) {
	dbA := NewDatabase(memorydb.New())
	dbB := NewDatabase(memorydb.New())
	emptyA, _ := New(common.Hash{}, dbA)
	emptyB, _ := New(emptyRoot, dbB)

	for i, trie := range []*Trie{emptyA, emptyB} {
		if req := NewSync(trie.Hash(), memorydb.New(), nil).Missing(1); len(req) != 0 {
			t.Errorf("test %d: content requested for empty trie: %v", i, req)
		}
	}
}

func TestIterativeSyncIndividual(t *testing.T) { testIterativeSync(t, 1) }
func TestIterativeSyncBatched(t *testing.T)    { testIterativeSync(t, 100) }

func testIterativeSync(t *testing.T, batch int) {

	srcDb, srcTrie, srcData := makeTestTrie()

	diskdb := memorydb.New()
	triedb := NewDatabase(diskdb)
	sched := NewSync(srcTrie.Hash(), diskdb, nil)

	queue := append([]common.Hash{}, sched.Missing(batch)...)
	for len(queue) > 0 {
		results := make([]SyncResult, len(queue))
		for i, hash := range queue {
			data, err := srcDb.Node(hash)
			if err != nil {
				t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
			}
			results[i] = SyncResult{hash, data}
		}
		if _, index, err := sched.Process(results); err != nil {
			t.Fatalf("failed to process result #%d: %v", index, err)
		}
		if index, err := sched.Commit(diskdb); err != nil {
			t.Fatalf("failed to commit data #%d: %v", index, err)
		}
		queue = append(queue[:0], sched.Missing(batch)...)
	}

	checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}

func TestIterativeDelayedSync(t *testing.T) {

	srcDb, srcTrie, srcData := makeTestTrie()

	diskdb := memorydb.New()
	triedb := NewDatabase(diskdb)
	sched := NewSync(srcTrie.Hash(), diskdb, nil)

	queue := append([]common.Hash{}, sched.Missing(10000)...)
	for len(queue) > 0 {

		results := make([]SyncResult, len(queue)/2+1)
		for i, hash := range queue[:len(results)] {
			data, err := srcDb.Node(hash)
			if err != nil {
				t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
			}
			results[i] = SyncResult{hash, data}
		}
		if _, index, err := sched.Process(results); err != nil {
			t.Fatalf("failed to process result #%d: %v", index, err)
		}
		if index, err := sched.Commit(diskdb); err != nil {
			t.Fatalf("failed to commit data #%d: %v", index, err)
		}
		queue = append(queue[len(results):], sched.Missing(10000)...)
	}

	checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}

func TestIterativeRandomSyncIndividual(t *testing.T) { testIterativeRandomSync(t, 1) }
func TestIterativeRandomSyncBatched(t *testing.T)    { testIterativeRandomSync(t, 100) }

func testIterativeRandomSync(t *testing.T, batch int) {

	srcDb, srcTrie, srcData := makeTestTrie()

	diskdb := memorydb.New()
	triedb := NewDatabase(diskdb)
	sched := NewSync(srcTrie.Hash(), diskdb, nil)

	queue := make(map[common.Hash]struct{})
	for _, hash := range sched.Missing(batch) {
		queue[hash] = struct{}{}
	}
	for len(queue) > 0 {

		results := make([]SyncResult, 0, len(queue))
		for hash := range queue {
			data, err := srcDb.Node(hash)
			if err != nil {
				t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
			}
			results = append(results, SyncResult{hash, data})
		}

		if _, index, err := sched.Process(results); err != nil {
			t.Fatalf("failed to process result #%d: %v", index, err)
		}
		if index, err := sched.Commit(diskdb); err != nil {
			t.Fatalf("failed to commit data #%d: %v", index, err)
		}
		queue = make(map[common.Hash]struct{})
		for _, hash := range sched.Missing(batch) {
			queue[hash] = struct{}{}
		}
	}

	checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}

func TestIterativeRandomDelayedSync(t *testing.T) {

	srcDb, srcTrie, srcData := makeTestTrie()

	diskdb := memorydb.New()
	triedb := NewDatabase(diskdb)
	sched := NewSync(srcTrie.Hash(), diskdb, nil)

	queue := make(map[common.Hash]struct{})
	for _, hash := range sched.Missing(10000) {
		queue[hash] = struct{}{}
	}
	for len(queue) > 0 {

		results := make([]SyncResult, 0, len(queue)/2+1)
		for hash := range queue {
			data, err := srcDb.Node(hash)
			if err != nil {
				t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
			}
			results = append(results, SyncResult{hash, data})

			if len(results) >= cap(results) {
				break
			}
		}

		if _, index, err := sched.Process(results); err != nil {
			t.Fatalf("failed to process result #%d: %v", index, err)
		}
		if index, err := sched.Commit(diskdb); err != nil {
			t.Fatalf("failed to commit data #%d: %v", index, err)
		}
		for _, result := range results {
			delete(queue, result.Hash)
		}
		for _, hash := range sched.Missing(10000) {
			queue[hash] = struct{}{}
		}
	}

	checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}

func TestDuplicateAvoidanceSync(t *testing.T) {

	srcDb, srcTrie, srcData := makeTestTrie()

	diskdb := memorydb.New()
	triedb := NewDatabase(diskdb)
	sched := NewSync(srcTrie.Hash(), diskdb, nil)

	queue := append([]common.Hash{}, sched.Missing(0)...)
	requested := make(map[common.Hash]struct{})

	for len(queue) > 0 {
		results := make([]SyncResult, len(queue))
		for i, hash := range queue {
			data, err := srcDb.Node(hash)
			if err != nil {
				t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
			}
			if _, ok := requested[hash]; ok {
				t.Errorf("hash %x already requested once", hash)
			}
			requested[hash] = struct{}{}

			results[i] = SyncResult{hash, data}
		}
		if _, index, err := sched.Process(results); err != nil {
			t.Fatalf("failed to process result #%d: %v", index, err)
		}
		if index, err := sched.Commit(diskdb); err != nil {
			t.Fatalf("failed to commit data #%d: %v", index, err)
		}
		queue = append(queue[:0], sched.Missing(0)...)
	}

	checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
}

func TestIncompleteSync(t *testing.T) {

	srcDb, srcTrie, _ := makeTestTrie()

	diskdb := memorydb.New()
	triedb := NewDatabase(diskdb)
	sched := NewSync(srcTrie.Hash(), diskdb, nil)

	var added []common.Hash
	queue := append([]common.Hash{}, sched.Missing(1)...)
	for len(queue) > 0 {

		results := make([]SyncResult, len(queue))
		for i, hash := range queue {
			data, err := srcDb.Node(hash)
			if err != nil {
				t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
			}
			results[i] = SyncResult{hash, data}
		}

		if _, index, err := sched.Process(results); err != nil {
			t.Fatalf("failed to process result #%d: %v", index, err)
		}
		if index, err := sched.Commit(diskdb); err != nil {
			t.Fatalf("failed to commit data #%d: %v", index, err)
		}
		for _, result := range results {
			added = append(added, result.Hash)
		}

		for _, root := range added {
			if err := checkTrieConsistency(triedb, root); err != nil {
				t.Fatalf("trie inconsistent: %v", err)
			}
		}

		queue = append(queue[:0], sched.Missing(1)...)
	}

	for _, node := range added[1:] {
		key := node.Bytes()
		value, _ := diskdb.Get(key)

		diskdb.Delete(key)
		if err := checkTrieConsistency(triedb, added[0]); err == nil {
			t.Fatalf("trie inconsistency not caught, missing: %x", key)
		}
		diskdb.Put(key, value)
	}
}