github.com/yinchengtsinghua/golang-Eos-dpos-Ethereum@v0.0.0-20190121132951-92cc4225ed8e/core/rawdb/accessors_chain_test.go

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//版权所有2018 Go Ethereum作者
//此文件是Go以太坊库的一部分。
//
//Go-Ethereum库是免费软件：您可以重新分发它和/或修改
//根据GNU发布的较低通用公共许可证的条款
//自由软件基金会，或者许可证的第3版，或者
//（由您选择）任何更高版本。
//
//Go以太坊图书馆的发行目的是希望它会有用，
//但没有任何保证；甚至没有
//适销性或特定用途的适用性。见
//GNU较低的通用公共许可证，了解更多详细信息。
//
//你应该收到一份GNU较低级别的公共许可证副本
//以及Go以太坊图书馆。如果没有，请参见<http://www.gnu.org/licenses/>。

package rawdb

import (
	"bytes"
	"math/big"
	"testing"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/crypto/sha3"
	"github.com/ethereum/go-ethereum/ethdb"
	"github.com/ethereum/go-ethereum/rlp"
)

//测试块头存储和检索操作。
func TestHeaderStorage(t *testing.T) {
	db := ethdb.NewMemDatabase()

//创建一个测试头以在数据库中移动，并确保它确实是新的
	header := &types.Header{Number: big.NewInt(42), Extra: []byte("test header")}
	if entry := ReadHeader(db, header.Hash(), header.Number.Uint64()); entry != nil {
		t.Fatalf("Non existent header returned: %v", entry)
	}
//在数据库中写入并验证头
	WriteHeader(db, header)
	if entry := ReadHeader(db, header.Hash(), header.Number.Uint64()); entry == nil {
		t.Fatalf("Stored header not found")
	} else if entry.Hash() != header.Hash() {
		t.Fatalf("Retrieved header mismatch: have %v, want %v", entry, header)
	}
	if entry := ReadHeaderRLP(db, header.Hash(), header.Number.Uint64()); entry == nil {
		t.Fatalf("Stored header RLP not found")
	} else {
		hasher := sha3.NewKeccak256()
		hasher.Write(entry)

		if hash := common.BytesToHash(hasher.Sum(nil)); hash != header.Hash() {
			t.Fatalf("Retrieved RLP header mismatch: have %v, want %v", entry, header)
		}
	}
//删除头并验证执行
	DeleteHeader(db, header.Hash(), header.Number.Uint64())
	if entry := ReadHeader(db, header.Hash(), header.Number.Uint64()); entry != nil {
		t.Fatalf("Deleted header returned: %v", entry)
	}
}

//测试块体存储和检索操作。
func TestBodyStorage(t *testing.T) {
	db := ethdb.NewMemDatabase()

//创建一个测试体以在数据库中移动，并确保它确实是新的
	body := &types.Body{Uncles: []*types.Header{{Extra: []byte("test header")}}}

	hasher := sha3.NewKeccak256()
	rlp.Encode(hasher, body)
	hash := common.BytesToHash(hasher.Sum(nil))

	if entry := ReadBody(db, hash, 0); entry != nil {
		t.Fatalf("Non existent body returned: %v", entry)
	}
//在数据库中写入并验证正文
	WriteBody(db, hash, 0, body)
	if entry := ReadBody(db, hash, 0); entry == nil {
		t.Fatalf("Stored body not found")
	} else if types.DeriveSha(types.Transactions(entry.Transactions)) != types.DeriveSha(types.Transactions(body.Transactions)) || types.CalcUncleHash(entry.Uncles) != types.CalcUncleHash(body.Uncles) {
		t.Fatalf("Retrieved body mismatch: have %v, want %v", entry, body)
	}
	if entry := ReadBodyRLP(db, hash, 0); entry == nil {
		t.Fatalf("Stored body RLP not found")
	} else {
		hasher := sha3.NewKeccak256()
		hasher.Write(entry)

		if calc := common.BytesToHash(hasher.Sum(nil)); calc != hash {
			t.Fatalf("Retrieved RLP body mismatch: have %v, want %v", entry, body)
		}
	}
//删除主体并验证执行
	DeleteBody(db, hash, 0)
	if entry := ReadBody(db, hash, 0); entry != nil {
		t.Fatalf("Deleted body returned: %v", entry)
	}
}

//测试块存储和检索操作。
func TestBlockStorage(t *testing.T) {
	db := ethdb.NewMemDatabase()

//创建一个测试块来移动数据库并确保它真的是新的
	block := types.NewBlockWithHeader(&types.Header{
		Extra:       []byte("test block"),
		UncleHash:   types.EmptyUncleHash,
		TxHash:      types.EmptyRootHash,
		ReceiptHash: types.EmptyRootHash,
	})
	if entry := ReadBlock(db, block.Hash(), block.NumberU64()); entry != nil {
		t.Fatalf("Non existent block returned: %v", entry)
	}
	if entry := ReadHeader(db, block.Hash(), block.NumberU64()); entry != nil {
		t.Fatalf("Non existent header returned: %v", entry)
	}
	if entry := ReadBody(db, block.Hash(), block.NumberU64()); entry != nil {
		t.Fatalf("Non existent body returned: %v", entry)
	}
//写入并验证数据库中的块
	WriteBlock(db, block)
	if entry := ReadBlock(db, block.Hash(), block.NumberU64()); entry == nil {
		t.Fatalf("Stored block not found")
	} else if entry.Hash() != block.Hash() {
		t.Fatalf("Retrieved block mismatch: have %v, want %v", entry, block)
	}
	if entry := ReadHeader(db, block.Hash(), block.NumberU64()); entry == nil {
		t.Fatalf("Stored header not found")
	} else if entry.Hash() != block.Header().Hash() {
		t.Fatalf("Retrieved header mismatch: have %v, want %v", entry, block.Header())
	}
	if entry := ReadBody(db, block.Hash(), block.NumberU64()); entry == nil {
		t.Fatalf("Stored body not found")
	} else if types.DeriveSha(types.Transactions(entry.Transactions)) != types.DeriveSha(block.Transactions()) || types.CalcUncleHash(entry.Uncles) != types.CalcUncleHash(block.Uncles()) {
		t.Fatalf("Retrieved body mismatch: have %v, want %v", entry, block.Body())
	}
//删除块并验证执行
	DeleteBlock(db, block.Hash(), block.NumberU64())
	if entry := ReadBlock(db, block.Hash(), block.NumberU64()); entry != nil {
		t.Fatalf("Deleted block returned: %v", entry)
	}
	if entry := ReadHeader(db, block.Hash(), block.NumberU64()); entry != nil {
		t.Fatalf("Deleted header returned: %v", entry)
	}
	if entry := ReadBody(db, block.Hash(), block.NumberU64()); entry != nil {
		t.Fatalf("Deleted body returned: %v", entry)
	}
}

//测试部分块内容不能重新组装成完整块。
func TestPartialBlockStorage(t *testing.T) {
	db := ethdb.NewMemDatabase()
	block := types.NewBlockWithHeader(&types.Header{
		Extra:       []byte("test block"),
		UncleHash:   types.EmptyUncleHash,
		TxHash:      types.EmptyRootHash,
		ReceiptHash: types.EmptyRootHash,
	})
//存储一个头并检查它是否未被识别为块
	WriteHeader(db, block.Header())
	if entry := ReadBlock(db, block.Hash(), block.NumberU64()); entry != nil {
		t.Fatalf("Non existent block returned: %v", entry)
	}
	DeleteHeader(db, block.Hash(), block.NumberU64())

//存储正文并检查它是否未被识别为块
	WriteBody(db, block.Hash(), block.NumberU64(), block.Body())
	if entry := ReadBlock(db, block.Hash(), block.NumberU64()); entry != nil {
		t.Fatalf("Non existent block returned: %v", entry)
	}
	DeleteBody(db, block.Hash(), block.NumberU64())

//单独存放一个收割台和一个车斗，并检查重新组装情况。
	WriteHeader(db, block.Header())
	WriteBody(db, block.Hash(), block.NumberU64(), block.Body())

	if entry := ReadBlock(db, block.Hash(), block.NumberU64()); entry == nil {
		t.Fatalf("Stored block not found")
	} else if entry.Hash() != block.Hash() {
		t.Fatalf("Retrieved block mismatch: have %v, want %v", entry, block)
	}
}

//测试块总难度存储和检索操作。
func TestTdStorage(t *testing.T) {
	db := ethdb.NewMemDatabase()

//创建一个测试td来移动数据库，并确保它是新的
	hash, td := common.Hash{}, big.NewInt(314)
	if entry := ReadTd(db, hash, 0); entry != nil {
		t.Fatalf("Non existent TD returned: %v", entry)
	}
//在数据库中编写并验证TD
	WriteTd(db, hash, 0, td)
	if entry := ReadTd(db, hash, 0); entry == nil {
		t.Fatalf("Stored TD not found")
	} else if entry.Cmp(td) != 0 {
		t.Fatalf("Retrieved TD mismatch: have %v, want %v", entry, td)
	}
//删除TD并验证执行情况
	DeleteTd(db, hash, 0)
	if entry := ReadTd(db, hash, 0); entry != nil {
		t.Fatalf("Deleted TD returned: %v", entry)
	}
}

//测试规范数字是否可以映射到哈希并进行检索。
func TestCanonicalMappingStorage(t *testing.T) {
	db := ethdb.NewMemDatabase()

//创建一个测试规范编号和分配的哈希以四处移动
	hash, number := common.Hash{0: 0xff}, uint64(314)
	if entry := ReadCanonicalHash(db, number); entry != (common.Hash{}) {
		t.Fatalf("Non existent canonical mapping returned: %v", entry)
	}
//在数据库中编写并验证TD
	WriteCanonicalHash(db, hash, number)
	if entry := ReadCanonicalHash(db, number); entry == (common.Hash{}) {
		t.Fatalf("Stored canonical mapping not found")
	} else if entry != hash {
		t.Fatalf("Retrieved canonical mapping mismatch: have %v, want %v", entry, hash)
	}
//删除TD并验证执行情况
	DeleteCanonicalHash(db, number)
	if entry := ReadCanonicalHash(db, number); entry != (common.Hash{}) {
		t.Fatalf("Deleted canonical mapping returned: %v", entry)
	}
}

//测试头标题和头块可以单独分配。
func TestHeadStorage(t *testing.T) {
	db := ethdb.NewMemDatabase()

	blockHead := types.NewBlockWithHeader(&types.Header{Extra: []byte("test block header")})
	blockFull := types.NewBlockWithHeader(&types.Header{Extra: []byte("test block full")})
	blockFast := types.NewBlockWithHeader(&types.Header{Extra: []byte("test block fast")})

//检查原始数据库中是否没有头条目
	if entry := ReadHeadHeaderHash(db); entry != (common.Hash{}) {
		t.Fatalf("Non head header entry returned: %v", entry)
	}
	if entry := ReadHeadBlockHash(db); entry != (common.Hash{}) {
		t.Fatalf("Non head block entry returned: %v", entry)
	}
	if entry := ReadHeadFastBlockHash(db); entry != (common.Hash{}) {
		t.Fatalf("Non fast head block entry returned: %v", entry)
	}
//为标题和块分配单独的条目
	WriteHeadHeaderHash(db, blockHead.Hash())
	WriteHeadBlockHash(db, blockFull.Hash())
	WriteHeadFastBlockHash(db, blockFast.Hash())

//检查两个磁头是否存在以及是否不同（即保持两个磁头）
	if entry := ReadHeadHeaderHash(db); entry != blockHead.Hash() {
		t.Fatalf("Head header hash mismatch: have %v, want %v", entry, blockHead.Hash())
	}
	if entry := ReadHeadBlockHash(db); entry != blockFull.Hash() {
		t.Fatalf("Head block hash mismatch: have %v, want %v", entry, blockFull.Hash())
	}
	if entry := ReadHeadFastBlockHash(db); entry != blockFast.Hash() {
		t.Fatalf("Fast head block hash mismatch: have %v, want %v", entry, blockFast.Hash())
	}
}

//测试与单个块关联的收据是否可以存储和检索。
func TestBlockReceiptStorage(t *testing.T) {
	db := ethdb.NewMemDatabase()

	receipt1 := &types.Receipt{
		Status:            types.ReceiptStatusFailed,
		CumulativeGasUsed: 1,
		Logs: []*types.Log{
			{Address: common.BytesToAddress([]byte{0x11})},
			{Address: common.BytesToAddress([]byte{0x01, 0x11})},
		},
		TxHash:          common.BytesToHash([]byte{0x11, 0x11}),
		ContractAddress: common.BytesToAddress([]byte{0x01, 0x11, 0x11}),
		GasUsed:         111111,
	}
	receipt2 := &types.Receipt{
		PostState:         common.Hash{2}.Bytes(),
		CumulativeGasUsed: 2,
		Logs: []*types.Log{
			{Address: common.BytesToAddress([]byte{0x22})},
			{Address: common.BytesToAddress([]byte{0x02, 0x22})},
		},
		TxHash:          common.BytesToHash([]byte{0x22, 0x22}),
		ContractAddress: common.BytesToAddress([]byte{0x02, 0x22, 0x22}),
		GasUsed:         222222,
	}
	receipts := []*types.Receipt{receipt1, receipt2}

//检查原始数据库中是否没有收据条目
	hash := common.BytesToHash([]byte{0x03, 0x14})
	if rs := ReadReceipts(db, hash, 0); len(rs) != 0 {
		t.Fatalf("non existent receipts returned: %v", rs)
	}
//将收据切片插入数据库并检查是否存在
	WriteReceipts(db, hash, 0, receipts)
	if rs := ReadReceipts(db, hash, 0); len(rs) == 0 {
		t.Fatalf("no receipts returned")
	} else {
		for i := 0; i < len(receipts); i++ {
			rlpHave, _ := rlp.EncodeToBytes(rs[i])
			rlpWant, _ := rlp.EncodeToBytes(receipts[i])

			if !bytes.Equal(rlpHave, rlpWant) {
				t.Fatalf("receipt #%d: receipt mismatch: have %v, want %v", i, rs[i], receipts[i])
			}
		}
	}
//删除收据切片并检查清除
	DeleteReceipts(db, hash, 0)
	if rs := ReadReceipts(db, hash, 0); len(rs) != 0 {
		t.Fatalf("deleted receipts returned: %v", rs)
	}
}