github.com/zhiqiangxu/go-ethereum@v1.9.16-0.20210824055606-be91cfdebc48/core/rawdb/chain_iterator_test.go (about)

     1  // Copyright 2019 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum 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-ethereum 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-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package rawdb
    18  
    19  import (
    20  	"math/big"
    21  	"reflect"
    22  	"sort"
    23  	"testing"
    24  
    25  	"github.com/zhiqiangxu/go-ethereum/common"
    26  	"github.com/zhiqiangxu/go-ethereum/core/types"
    27  )
    28  
    29  func TestChainIterator(t *testing.T) {
    30  	// Construct test chain db
    31  	chainDb := NewMemoryDatabase()
    32  
    33  	var block *types.Block
    34  	var txs []*types.Transaction
    35  	for i := uint64(0); i <= 10; i++ {
    36  		if i == 0 {
    37  			block = types.NewBlock(&types.Header{Number: big.NewInt(int64(i))}, nil, nil, nil) // Empty genesis block
    38  		} else {
    39  			tx := types.NewTransaction(i, common.BytesToAddress([]byte{0x11}), big.NewInt(111), 1111, big.NewInt(11111), []byte{0x11, 0x11, 0x11})
    40  			txs = append(txs, tx)
    41  			block = types.NewBlock(&types.Header{Number: big.NewInt(int64(i))}, []*types.Transaction{tx}, nil, nil)
    42  		}
    43  		WriteBlock(chainDb, block)
    44  		WriteCanonicalHash(chainDb, block.Hash(), block.NumberU64())
    45  	}
    46  
    47  	var cases = []struct {
    48  		from, to uint64
    49  		reverse  bool
    50  		expect   []int
    51  	}{
    52  		{0, 11, true, []int{10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}},
    53  		{0, 0, true, nil},
    54  		{0, 5, true, []int{4, 3, 2, 1, 0}},
    55  		{10, 11, true, []int{10}},
    56  		{0, 11, false, []int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}},
    57  		{0, 0, false, nil},
    58  		{10, 11, false, []int{10}},
    59  	}
    60  	for i, c := range cases {
    61  		var numbers []int
    62  		hashCh, _ := iterateTransactions(chainDb, c.from, c.to, c.reverse)
    63  		if hashCh != nil {
    64  			for h := range hashCh {
    65  				numbers = append(numbers, int(h.number))
    66  				if len(h.hashes) > 0 {
    67  					if got, exp := h.hashes[0], txs[h.number-1].Hash(); got != exp {
    68  						t.Fatalf("hash wrong, got %x exp %x", got, exp)
    69  					}
    70  				}
    71  			}
    72  		}
    73  		if !c.reverse {
    74  			sort.Ints(numbers)
    75  		} else {
    76  			sort.Sort(sort.Reverse(sort.IntSlice(numbers)))
    77  		}
    78  		if !reflect.DeepEqual(numbers, c.expect) {
    79  			t.Fatalf("Case %d failed, visit element mismatch, want %v, got %v", i, c.expect, numbers)
    80  		}
    81  	}
    82  }