github.com/ledgerwatch/erigon-lib@v1.0.0/kv/bitmapdb/fixed_size_test.go (about)

     1  /*
     2     Copyright 2021 Erigon contributors
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package bitmapdb
    18  
    19  import (
    20  	"os"
    21  	"path/filepath"
    22  	"testing"
    23  
    24  	"github.com/ledgerwatch/log/v3"
    25  	"github.com/stretchr/testify/require"
    26  )
    27  
    28  func TestFixedSizeBitmaps(t *testing.T) {
    29  
    30  	tmpDir, require := t.TempDir(), require.New(t)
    31  	must := require.NoError
    32  	idxPath := filepath.Join(tmpDir, "idx.tmp")
    33  	wr, err := NewFixedSizeBitmapsWriter(idxPath, 14, 7, log.New())
    34  	require.NoError(err)
    35  	defer wr.Close()
    36  
    37  	must(wr.AddArray(0, []uint64{3, 9, 11}))
    38  	must(wr.AddArray(1, []uint64{1, 2, 3}))
    39  	must(wr.AddArray(2, []uint64{4, 8, 13}))
    40  	must(wr.AddArray(3, []uint64{1, 13}))
    41  	must(wr.AddArray(4, []uint64{1, 13}))
    42  	must(wr.AddArray(5, []uint64{1, 13}))
    43  	must(wr.AddArray(6, []uint64{0, 9, 13}))
    44  	must(wr.AddArray(7, []uint64{7}))
    45  
    46  	require.Error(wr.AddArray(8, []uint64{8}))
    47  	err = wr.Build()
    48  	require.NoError(err)
    49  
    50  	bm, err := OpenFixedSizeBitmaps(idxPath, 14)
    51  	require.NoError(err)
    52  	defer bm.Close()
    53  
    54  	at := func(item uint64) []uint64 {
    55  		n, err := bm.At(item)
    56  		require.NoError(err)
    57  		return n
    58  	}
    59  
    60  	require.Equal([]uint64{3, 9, 11}, at(0))
    61  	require.Equal([]uint64{1, 2, 3}, at(1))
    62  	require.Equal([]uint64{4, 8, 13}, at(2))
    63  	require.Equal([]uint64{1, 13}, at(3))
    64  	require.Equal([]uint64{1, 13}, at(4))
    65  	require.Equal([]uint64{1, 13}, at(5))
    66  	require.Equal([]uint64{0, 9, 13}, at(6))
    67  	require.Equal([]uint64{7}, at(7))
    68  
    69  	fst, snd, ok, ok2, err := bm.First2At(7, 0)
    70  	require.NoError(err)
    71  	require.Equal(uint64(7), fst)
    72  	require.Equal(uint64(0), snd)
    73  	require.Equal(true, ok)
    74  	require.Equal(false, ok2)
    75  
    76  	fst, snd, ok, ok2, err = bm.First2At(2, 8)
    77  	require.NoError(err)
    78  	require.Equal(uint64(8), fst)
    79  	require.Equal(uint64(13), snd)
    80  	require.Equal(true, ok)
    81  	require.Equal(true, ok2)
    82  
    83  	fst, snd, ok, ok2, err = bm.First2At(2, 9)
    84  	require.NoError(err)
    85  	require.Equal(uint64(13), fst)
    86  	require.Equal(uint64(0), snd)
    87  	require.Equal(true, ok)
    88  	require.Equal(false, ok2)
    89  
    90  	_, err = bm.At(8)
    91  	require.Error(err)
    92  }
    93  
    94  func TestPageAlined(t *testing.T) {
    95  	tmpDir, require := t.TempDir(), require.New(t)
    96  	idxPath := filepath.Join(tmpDir, "idx.tmp")
    97  
    98  	bm2, err := NewFixedSizeBitmapsWriter(idxPath, 128, 100, log.New())
    99  	require.NoError(err)
   100  	require.Equal((128/8*100/os.Getpagesize()+1)*os.Getpagesize(), bm2.size)
   101  	defer bm2.Close()
   102  	bm2.Close()
   103  
   104  	bm3, err := NewFixedSizeBitmapsWriter(idxPath, 128, 1000, log.New())
   105  	require.NoError(err)
   106  	require.Equal((128/8*1000/os.Getpagesize()+1)*os.Getpagesize(), bm3.size)
   107  	defer bm3.Close()
   108  }