gitee.com/liu-zhao234568/cntest@v1.0.0/core/rawdb/table_test.go (about)

     1  // Copyright 2020 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  	"bytes"
    21  	"testing"
    22  
    23  	"gitee.com/liu-zhao234568/cntest/ethdb"
    24  )
    25  
    26  func TestTableDatabase(t *testing.T)            { testTableDatabase(t, "prefix") }
    27  func TestEmptyPrefixTableDatabase(t *testing.T) { testTableDatabase(t, "") }
    28  
    29  type testReplayer struct {
    30  	puts [][]byte
    31  	dels [][]byte
    32  }
    33  
    34  func (r *testReplayer) Put(key []byte, value []byte) error {
    35  	r.puts = append(r.puts, key)
    36  	return nil
    37  }
    38  
    39  func (r *testReplayer) Delete(key []byte) error {
    40  	r.dels = append(r.dels, key)
    41  	return nil
    42  }
    43  
    44  func testTableDatabase(t *testing.T, prefix string) {
    45  	db := NewTable(NewMemoryDatabase(), prefix)
    46  
    47  	var entries = []struct {
    48  		key   []byte
    49  		value []byte
    50  	}{
    51  		{[]byte{0x01, 0x02}, []byte{0x0a, 0x0b}},
    52  		{[]byte{0x03, 0x04}, []byte{0x0c, 0x0d}},
    53  		{[]byte{0x05, 0x06}, []byte{0x0e, 0x0f}},
    54  
    55  		{[]byte{0xff, 0xff, 0x01}, []byte{0x1a, 0x1b}},
    56  		{[]byte{0xff, 0xff, 0x02}, []byte{0x1c, 0x1d}},
    57  		{[]byte{0xff, 0xff, 0x03}, []byte{0x1e, 0x1f}},
    58  	}
    59  
    60  	// Test Put/Get operation
    61  	for _, entry := range entries {
    62  		db.Put(entry.key, entry.value)
    63  	}
    64  	for _, entry := range entries {
    65  		got, err := db.Get(entry.key)
    66  		if err != nil {
    67  			t.Fatalf("Failed to get value: %v", err)
    68  		}
    69  		if !bytes.Equal(got, entry.value) {
    70  			t.Fatalf("Value mismatch: want=%v, got=%v", entry.value, got)
    71  		}
    72  	}
    73  
    74  	// Test batch operation
    75  	db = NewTable(NewMemoryDatabase(), prefix)
    76  	batch := db.NewBatch()
    77  	for _, entry := range entries {
    78  		batch.Put(entry.key, entry.value)
    79  	}
    80  	batch.Write()
    81  	for _, entry := range entries {
    82  		got, err := db.Get(entry.key)
    83  		if err != nil {
    84  			t.Fatalf("Failed to get value: %v", err)
    85  		}
    86  		if !bytes.Equal(got, entry.value) {
    87  			t.Fatalf("Value mismatch: want=%v, got=%v", entry.value, got)
    88  		}
    89  	}
    90  
    91  	// Test batch replayer
    92  	r := &testReplayer{}
    93  	batch.Replay(r)
    94  	for index, entry := range entries {
    95  		got := r.puts[index]
    96  		if !bytes.Equal(got, entry.key) {
    97  			t.Fatalf("Key mismatch: want=%v, got=%v", entry.key, got)
    98  		}
    99  	}
   100  
   101  	check := func(iter ethdb.Iterator, expCount, index int) {
   102  		count := 0
   103  		for iter.Next() {
   104  			key, value := iter.Key(), iter.Value()
   105  			if !bytes.Equal(key, entries[index].key) {
   106  				t.Fatalf("Key mismatch: want=%v, got=%v", entries[index].key, key)
   107  			}
   108  			if !bytes.Equal(value, entries[index].value) {
   109  				t.Fatalf("Value mismatch: want=%v, got=%v", entries[index].value, value)
   110  			}
   111  			index += 1
   112  			count++
   113  		}
   114  		if count != expCount {
   115  			t.Fatalf("Wrong number of elems, exp %d got %d", expCount, count)
   116  		}
   117  		iter.Release()
   118  	}
   119  	// Test iterators
   120  	check(db.NewIterator(nil, nil), 6, 0)
   121  	// Test iterators with prefix
   122  	check(db.NewIterator([]byte{0xff, 0xff}, nil), 3, 3)
   123  	// Test iterators with start point
   124  	check(db.NewIterator(nil, []byte{0xff, 0xff, 0x02}), 2, 4)
   125  	// Test iterators with prefix and start point
   126  	check(db.NewIterator([]byte{0xee}, nil), 0, 0)
   127  	check(db.NewIterator(nil, []byte{0x00}), 6, 0)
   128  }