internal/blocktest: add package for shared test code (#27270)

core/rawdb/accessors_indexes_test.go

@@ -18,42 +18,18 @@ package rawdb
 
 import (
 	"bytes"
-	"hash"
 	"math/big"
 	"testing"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/internal/blocktest"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rlp"
-	"golang.org/x/crypto/sha3"
 )
 
-// testHasher is the helper tool for transaction/receipt list hashing.
+var newHasher = blocktest.NewHasher
-// The original hasher is trie, in order to get rid of import cycle,
-// use the testing hasher instead.
-type testHasher struct {
-	hasher hash.Hash
-}
-
-func newHasher() *testHasher {
-	return &testHasher{hasher: sha3.NewLegacyKeccak256()}
-}
-
-func (h *testHasher) Reset() {
-	h.hasher.Reset()
-}
-
-func (h *testHasher) Update(key, val []byte) error {
-	h.hasher.Write(key)
-	h.hasher.Write(val)
-	return nil
-}
-
-func (h *testHasher) Hash() common.Hash {
-	return common.BytesToHash(h.hasher.Sum(nil))
-}
 
 // Tests that positional lookup metadata can be stored and retrieved.
 func TestLookupStorage(t *testing.T) {

core/types/block_test.go

@@ -18,7 +18,6 @@ package types
 
 import (
 	"bytes"
-	"hash"
 	"math/big"
 	"reflect"
 	"testing"
@@ -26,9 +25,9 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/math"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/internal/blocktest"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rlp"
-	"golang.org/x/crypto/sha3"
 )
 
 // from bcValidBlockTest.json, "SimpleTx"
@@ -217,31 +216,6 @@ func BenchmarkEncodeBlock(b *testing.B) {
 	}
 }
 
-// testHasher is the helper tool for transaction/receipt list hashing.
-// The original hasher is trie, in order to get rid of import cycle,
-// use the testing hasher instead.
-type testHasher struct {
-	hasher hash.Hash
-}
-
-func newHasher() *testHasher {
-	return &testHasher{hasher: sha3.NewLegacyKeccak256()}
-}
-
-func (h *testHasher) Reset() {
-	h.hasher.Reset()
-}
-
-func (h *testHasher) Update(key, val []byte) error {
-	h.hasher.Write(key)
-	h.hasher.Write(val)
-	return nil
-}
-
-func (h *testHasher) Hash() common.Hash {
-	return common.BytesToHash(h.hasher.Sum(nil))
-}
-
 func makeBenchBlock() *Block {
 	var (
 		key, _   = crypto.GenerateKey()
@@ -280,7 +254,7 @@ func makeBenchBlock() *Block {
 			Extra:      []byte("benchmark uncle"),
 		}
 	}
-	return NewBlock(header, txs, uncles, receipts, newHasher())
+	return NewBlock(header, txs, uncles, receipts, blocktest.NewHasher())
 }
 
 func TestRlpDecodeParentHash(t *testing.T) {

internal/blocktest/test_hash.go

@@ -0,0 +1,59 @@
+// Copyright 2023 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package utesting provides a standalone replacement for package testing.
+//
+// This package exists because package testing cannot easily be embedded into a
+// standalone go program. It provides an API that mirrors the standard library
+// testing API.
+
+package blocktest
+
+import (
+	"hash"
+
+	"github.com/ethereum/go-ethereum/common"
+	"golang.org/x/crypto/sha3"
+)
+
+// testHasher is the helper tool for transaction/receipt list hashing.
+// The original hasher is trie, in order to get rid of import cycle,
+// use the testing hasher instead.
+type testHasher struct {
+	hasher hash.Hash
+}
+
+// NewHasher returns a new testHasher instance.
+func NewHasher() *testHasher {
+	return &testHasher{hasher: sha3.NewLegacyKeccak256()}
+}
+
+// Reset resets the hash state.
+func (h *testHasher) Reset() {
+	h.hasher.Reset()
+}
+
+// Update updates the hash state with the given key and value.
+func (h *testHasher) Update(key, val []byte) error {
+	h.hasher.Write(key)
+	h.hasher.Write(val)
+	return nil
+}
+
+// Hash returns the hash value.
+func (h *testHasher) Hash() common.Hash {
+	return common.BytesToHash(h.hasher.Sum(nil))
+}

internal/ethapi/api_test.go

@@ -21,7 +21,6 @@ import (
 	"crypto/ecdsa"
 	"encoding/json"
 	"errors"
-	"hash"
 	"math/big"
 	"reflect"
 	"testing"
@@ -42,10 +41,10 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
+	"github.com/ethereum/go-ethereum/internal/blocktest"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/stretchr/testify/require"
-	"golang.org/x/crypto/sha3"
 	"golang.org/x/exp/slices"
 )
 
@@ -668,31 +667,6 @@ func hex2Bytes(str string) *hexutil.Bytes {
 	return &rpcBytes
 }
 
-// testHasher is the helper tool for transaction/receipt list hashing.
-// The original hasher is trie, in order to get rid of import cycle,
-// use the testing hasher instead.
-type testHasher struct {
-	hasher hash.Hash
-}
-
-func newHasher() *testHasher {
-	return &testHasher{hasher: sha3.NewLegacyKeccak256()}
-}
-
-func (h *testHasher) Reset() {
-	h.hasher.Reset()
-}
-
-func (h *testHasher) Update(key, val []byte) error {
-	h.hasher.Write(key)
-	h.hasher.Write(val)
-	return nil
-}
-
-func (h *testHasher) Hash() common.Hash {
-	return common.BytesToHash(h.hasher.Sum(nil))
-}
-
 func TestRPCMarshalBlock(t *testing.T) {
 	t.Parallel()
 	var (
@@ -723,7 +697,7 @@ func TestRPCMarshalBlock(t *testing.T) {
 		}
 		txs = append(txs, tx)
 	}
-	block := types.NewBlock(&types.Header{Number: big.NewInt(100)}, txs, nil, nil, newHasher())
+	block := types.NewBlock(&types.Header{Number: big.NewInt(100)}, txs, nil, nil, blocktest.NewHasher())
 
 	var testSuite = []struct {
 		inclTx bool
@@ -795,7 +769,7 @@ func TestRPCGetBlockOrHeader(t *testing.T) {
 			Address:   common.Address{0x12, 0x34},
 			Amount:    10,
 		}
-		pending = types.NewBlockWithWithdrawals(&types.Header{Number: big.NewInt(11), Time: 42}, []*types.Transaction{tx}, nil, nil, []*types.Withdrawal{withdrawal}, newHasher())
+		pending = types.NewBlockWithWithdrawals(&types.Header{Number: big.NewInt(11), Time: 42}, []*types.Transaction{tx}, nil, nil, []*types.Withdrawal{withdrawal}, blocktest.NewHasher())
 	)
 	backend := newTestBackend(t, genBlocks, genesis, func(i int, b *core.BlockGen) {
 		// Transfer from account[0] to account[1]