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https://gitlab.com/pulsechaincom/erigon-pulse.git
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231e468e19
git-subtree-dir: erigon-lib git-subtree-mainline:3c8cbda809git-subtree-split:93d9c9d9fe
81 lines
2.0 KiB
Go
81 lines
2.0 KiB
Go
/*
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Copyright 2022 Erigon contributors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package recsplit
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import (
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"bufio"
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"context"
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"fmt"
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"os"
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"path/filepath"
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"testing"
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"github.com/ledgerwatch/log/v3"
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"github.com/stretchr/testify/require"
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)
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func TestReWriteIndex(t *testing.T) {
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logger := log.New()
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tmpDir := t.TempDir()
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indexFile := filepath.Join(tmpDir, "index")
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rs, err := NewRecSplit(RecSplitArgs{
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KeyCount: 100,
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BucketSize: 10,
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Salt: 0,
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TmpDir: tmpDir,
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IndexFile: indexFile,
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LeafSize: 8,
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}, logger)
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if err != nil {
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t.Fatal(err)
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}
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for i := 0; i < 100; i++ {
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if err = rs.AddKey([]byte(fmt.Sprintf("key %d", i)), uint64(i*17)); err != nil {
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t.Fatal(err)
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}
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}
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if err := rs.Build(context.Background()); err != nil {
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t.Fatal(err)
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}
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idx := MustOpen(indexFile)
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defer idx.Close()
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offsets := idx.ExtractOffsets()
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for i := 0; i < 100; i++ {
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_, ok := offsets[uint64(i*17)]
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require.True(t, ok)
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offsets[uint64(i*17)] = uint64(i * 3965)
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}
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reindexFile := filepath.Join(tmpDir, "reindex")
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f, err := os.Create(reindexFile)
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require.NoError(t, err)
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defer f.Close()
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w := bufio.NewWriter(f)
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err = idx.RewriteWithOffsets(w, offsets)
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require.NoError(t, err)
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require.NoError(t, w.Flush())
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require.NoError(t, f.Close())
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reidx := MustOpen(reindexFile)
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defer reidx.Close()
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for i := 0; i < 100; i++ {
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reader := NewIndexReader(reidx)
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offset := reader.Lookup([]byte(fmt.Sprintf("key %d", i)))
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if offset != uint64(i*3965) {
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t.Errorf("expected offset: %d, looked up: %d", i*3965, offset)
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}
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}
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}
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