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package util
import (
crand "crypto/rand"
"fmt"
"math/rand"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/trie"
"github.com/stretchr/testify/require"
)
var testAddr = common.Address{0: 0xff}
func TestStateIteratorWorkers(t *testing.T) {
_, factory, _ := setupRandTest(t)
for i := -1; i <= 0; i++ {
require.Panics(t, func() {
_ = IterateState(factory, testAddr, func(db *state.StateDB, key, value common.Hash) error {
return nil
}, i)
})
}
}
func TestStateIteratorNonexistentAccount(t *testing.T) {
_, factory, _ := setupRandTest(t)
require.ErrorContains(t, IterateState(factory, common.Address{}, func(db *state.StateDB, key, value common.Hash) error {
return nil
}, 1), "account does not exist")
}
func TestStateIteratorRandomOK(t *testing.T) {
for i := 0; i < 100; i++ {
hashes, factory, workerCount := setupRandTest(t)
seenHashes := make(map[common.Hash]bool)
hashCh := make(chan common.Hash)
doneCh := make(chan struct{})
go func() {
defer close(doneCh)
for hash := range hashCh {
seenHashes[hash] = true
}
}()
require.NoError(t, IterateState(factory, testAddr, func(db *state.StateDB, key, value common.Hash) error {
hashCh <- key
return nil
}, workerCount))
close(hashCh)
<-doneCh
// Perform a less or equal check here in case of duplicates. The map check below will assert
// that all of the hashes are accounted for.
require.LessOrEqual(t, len(seenHashes), len(hashes))
// Every hash we put into state should have been iterated over.
for _, hash := range hashes {
require.Contains(t, seenHashes, hash)
}
}
}
func TestStateIteratorRandomError(t *testing.T) {
for i := 0; i < 100; i++ {
hashes, factory, workerCount := setupRandTest(t)
failHash := hashes[rand.Intn(len(hashes))]
require.ErrorContains(t, IterateState(factory, testAddr, func(db *state.StateDB, key, value common.Hash) error {
if key == failHash {
return fmt.Errorf("test error")
}
return nil
}, workerCount), "test error")
}
}
func TestPartitionKeyspace(t *testing.T) {
tests := []struct {
i int
count int
expected [2]common.Hash
}{
{
i: 0,
count: 1,
expected: [2]common.Hash{
common.HexToHash("0x00"),
common.HexToHash("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"),
},
},
{
i: 0,
count: 2,
expected: [2]common.Hash{
common.HexToHash("0x00"),
common.HexToHash("0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"),
},
},
{
i: 1,
count: 2,
expected: [2]common.Hash{
common.HexToHash("0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"),
common.HexToHash("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"),
},
},
{
i: 0,
count: 3,
expected: [2]common.Hash{
common.HexToHash("0x00"),
common.HexToHash("0x5555555555555555555555555555555555555555555555555555555555555555"),
},
},
{
i: 1,
count: 3,
expected: [2]common.Hash{
common.HexToHash("0x5555555555555555555555555555555555555555555555555555555555555555"),
common.HexToHash("0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"),
},
},
{
i: 2,
count: 3,
expected: [2]common.Hash{
common.HexToHash("0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"),
common.HexToHash("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"),
},
},
}
for _, tt := range tests {
t.Run(fmt.Sprintf("i %d, count %d", tt.i, tt.count), func(t *testing.T) {
start, end := PartitionKeyspace(tt.i, tt.count)
require.Equal(t, tt.expected[0], start)
require.Equal(t, tt.expected[1], end)
})
}
t.Run("panics on invalid i or count", func(t *testing.T) {
require.Panics(t, func() {
PartitionKeyspace(1, 1)
})
require.Panics(t, func() {
PartitionKeyspace(-1, 1)
})
require.Panics(t, func() {
PartitionKeyspace(0, -1)
})
require.Panics(t, func() {
PartitionKeyspace(-1, -1)
})
})
}
func setupRandTest(t *testing.T) ([]common.Hash, DBFactory, int) {
memDB := rawdb.NewMemoryDatabase()
db, err := state.New(common.Hash{}, state.NewDatabaseWithConfig(memDB, &trie.Config{
Preimages: true,
Cache: 1024,
}), nil)
require.NoError(t, err)
hashCount := rand.Intn(100)
if hashCount == 0 {
hashCount = 1
}
hashes := make([]common.Hash, hashCount)
db.CreateAccount(testAddr)
for j := 0; j < hashCount; j++ {
hashes[j] = randHash(t)
db.SetState(testAddr, hashes[j], hashes[j])
}
root, err := db.Commit(false)
require.NoError(t, err)
err = db.Database().TrieDB().Commit(root, true)
require.NoError(t, err)
factory := func() (*state.StateDB, error) {
return state.New(root, state.NewDatabaseWithConfig(memDB, &trie.Config{
Preimages: true,
Cache: 1024,
}), nil)
}
workerCount := rand.Intn(64)
if workerCount == 0 {
workerCount = 1
}
return hashes, factory, workerCount
}
func randHash(t *testing.T) common.Hash {
var h common.Hash
_, err := crand.Read(h[:])
require.NoError(t, err)
return h
}