mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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231e468e19
git-subtree-dir: erigon-lib git-subtree-mainline:3c8cbda809git-subtree-split:93d9c9d9fe
272 lines
8.1 KiB
Go
272 lines
8.1 KiB
Go
/*
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Copyright 2021 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 compress
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import (
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"context"
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"fmt"
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"hash/crc32"
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"io"
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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 TestCompressEmptyDict(t *testing.T) {
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logger := log.New()
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tmpDir := t.TempDir()
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file := filepath.Join(tmpDir, "compressed")
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c, err := NewCompressor(context.Background(), t.Name(), file, tmpDir, 100, 1, log.LvlDebug, logger)
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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if err = c.AddWord([]byte("word")); err != nil {
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t.Fatal(err)
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}
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if err = c.Compress(); err != nil {
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t.Fatal(err)
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}
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var d *Decompressor
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if d, err = NewDecompressor(file); err != nil {
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t.Fatal(err)
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}
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defer d.Close()
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g := d.MakeGetter()
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if !g.HasNext() {
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t.Fatalf("expected a word")
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}
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word, _ := g.Next(nil)
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if string(word) != "word" {
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t.Fatalf("expeced word, got (hex) %x", word)
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}
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if g.HasNext() {
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t.Fatalf("not expecting anything else")
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}
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}
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// nolint
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func checksum(file string) uint32 {
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hasher := crc32.NewIEEE()
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f, err := os.Open(file)
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if err != nil {
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panic(err)
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}
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defer f.Close()
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if _, err := io.Copy(hasher, f); err != nil {
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panic(err)
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}
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return hasher.Sum32()
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}
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func prepareDict(t *testing.T) *Decompressor {
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t.Helper()
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logger := log.New()
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tmpDir := t.TempDir()
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file := filepath.Join(tmpDir, "compressed")
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t.Name()
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c, err := NewCompressor(context.Background(), t.Name(), file, tmpDir, 1, 2, log.LvlDebug, logger)
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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for i := 0; i < 100; i++ {
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if err = c.AddWord(nil); err != nil {
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panic(err)
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}
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if err = c.AddWord([]byte("long")); err != nil {
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t.Fatal(err)
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}
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if err = c.AddWord([]byte("word")); err != nil {
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t.Fatal(err)
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}
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if err = c.AddWord([]byte(fmt.Sprintf("%d longlongword %d", i, i))); err != nil {
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t.Fatal(err)
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}
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}
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if err = c.Compress(); err != nil {
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t.Fatal(err)
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}
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var d *Decompressor
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if d, err = NewDecompressor(file); err != nil {
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t.Fatal(err)
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}
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return d
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}
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func TestCompressDict1(t *testing.T) {
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d := prepareDict(t)
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defer d.Close()
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g := d.MakeGetter()
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i := 0
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g.Reset(0)
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for g.HasNext() {
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// next word is `nil`
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require.False(t, g.MatchPrefix([]byte("long")))
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require.True(t, g.MatchPrefix([]byte("")))
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require.True(t, g.MatchPrefix([]byte{}))
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require.Equal(t, 1, g.MatchPrefixCmp([]byte("long")))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte("")))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte{}))
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word, _ := g.Next(nil)
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require.NotNil(t, word)
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require.Zero(t, len(word))
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// next word is `long`
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require.True(t, g.MatchPrefix([]byte("long")))
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require.False(t, g.MatchPrefix([]byte("longlong")))
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require.False(t, g.MatchPrefix([]byte("wordnotmatch")))
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require.False(t, g.MatchPrefix([]byte("longnotmatch")))
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require.True(t, g.MatchPrefix([]byte{}))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte("long")))
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require.Equal(t, 1, g.MatchPrefixCmp([]byte("longlong")))
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require.Equal(t, 1, g.MatchPrefixCmp([]byte("wordnotmatch")))
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require.Equal(t, 1, g.MatchPrefixCmp([]byte("longnotmatch")))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte{}))
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_, _ = g.Next(nil)
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// next word is `word`
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require.False(t, g.MatchPrefix([]byte("long")))
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require.False(t, g.MatchPrefix([]byte("longlong")))
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require.True(t, g.MatchPrefix([]byte("word")))
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require.True(t, g.MatchPrefix([]byte("")))
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require.True(t, g.MatchPrefix(nil))
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require.False(t, g.MatchPrefix([]byte("wordnotmatch")))
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require.False(t, g.MatchPrefix([]byte("longnotmatch")))
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require.Equal(t, -1, g.MatchPrefixCmp([]byte("long")))
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require.Equal(t, -1, g.MatchPrefixCmp([]byte("longlong")))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte("word")))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte("")))
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require.Equal(t, 0, g.MatchPrefixCmp(nil))
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require.Equal(t, 1, g.MatchPrefixCmp([]byte("wordnotmatch")))
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require.Equal(t, -1, g.MatchPrefixCmp([]byte("longnotmatch")))
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_, _ = g.Next(nil)
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// next word is `longlongword %d`
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expectPrefix := fmt.Sprintf("%d long", i)
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require.True(t, g.MatchPrefix([]byte(fmt.Sprintf("%d", i))))
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require.True(t, g.MatchPrefix([]byte(expectPrefix)))
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require.True(t, g.MatchPrefix([]byte(expectPrefix+"long")))
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require.True(t, g.MatchPrefix([]byte(expectPrefix+"longword ")))
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require.False(t, g.MatchPrefix([]byte("wordnotmatch")))
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require.False(t, g.MatchPrefix([]byte("longnotmatch")))
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require.True(t, g.MatchPrefix([]byte{}))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte(fmt.Sprintf("%d", i))))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte(expectPrefix)))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte(expectPrefix+"long")))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte(expectPrefix+"longword ")))
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require.Equal(t, 1, g.MatchPrefixCmp([]byte("wordnotmatch")))
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require.Equal(t, 1, g.MatchPrefixCmp([]byte("longnotmatch")))
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require.Equal(t, 0, g.MatchPrefixCmp([]byte{}))
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savePos := g.dataP
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word, nextPos := g.Next(nil)
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expected := fmt.Sprintf("%d longlongword %d", i, i)
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g.Reset(savePos)
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require.Equal(t, 0, g.MatchCmp([]byte(expected)))
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g.Reset(nextPos)
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if string(word) != expected {
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t.Errorf("expected %s, got (hex) [%s]", expected, word)
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}
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i++
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}
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if cs := checksum(d.filePath); cs != 3153486123 {
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// it's ok if hash changed, but need re-generate all existing snapshot hashes
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// in https://github.com/ledgerwatch/erigon-snapshot
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t.Errorf("result file hash changed, %d", cs)
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}
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}
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func TestCompressDictCmp(t *testing.T) {
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d := prepareDict(t)
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defer d.Close()
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g := d.MakeGetter()
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i := 0
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g.Reset(0)
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for g.HasNext() {
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// next word is `nil`
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savePos := g.dataP
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require.Equal(t, 1, g.MatchCmp([]byte("long")))
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require.Equal(t, 0, g.MatchCmp([]byte(""))) // moves offset
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g.Reset(savePos)
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require.Equal(t, 0, g.MatchCmp([]byte{})) // moves offset
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g.Reset(savePos)
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word, _ := g.Next(nil)
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require.NotNil(t, word)
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require.Zero(t, len(word))
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// next word is `long`
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savePos = g.dataP
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require.Equal(t, 0, g.MatchCmp([]byte("long"))) // moves offset
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g.Reset(savePos)
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require.Equal(t, 1, g.MatchCmp([]byte("longlong")))
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require.Equal(t, 1, g.MatchCmp([]byte("wordnotmatch")))
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require.Equal(t, 1, g.MatchCmp([]byte("longnotmatch")))
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require.Equal(t, -1, g.MatchCmp([]byte{}))
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_, _ = g.Next(nil)
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// next word is `word`
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savePos = g.dataP
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require.Equal(t, -1, g.MatchCmp([]byte("long")))
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require.Equal(t, -1, g.MatchCmp([]byte("longlong")))
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require.Equal(t, 0, g.MatchCmp([]byte("word"))) // moves offset
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g.Reset(savePos)
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require.Equal(t, -1, g.MatchCmp([]byte("")))
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require.Equal(t, -1, g.MatchCmp(nil))
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require.Equal(t, 1, g.MatchCmp([]byte("wordnotmatch")))
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require.Equal(t, -1, g.MatchCmp([]byte("longnotmatch")))
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_, _ = g.Next(nil)
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// next word is `longlongword %d`
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expectPrefix := fmt.Sprintf("%d long", i)
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require.Equal(t, -1, g.MatchCmp([]byte(fmt.Sprintf("%d", i))))
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require.Equal(t, -1, g.MatchCmp([]byte(expectPrefix)))
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require.Equal(t, -1, g.MatchCmp([]byte(expectPrefix+"long")))
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require.Equal(t, -1, g.MatchCmp([]byte(expectPrefix+"longword ")))
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require.Equal(t, 1, g.MatchCmp([]byte("wordnotmatch")))
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require.Equal(t, 1, g.MatchCmp([]byte("longnotmatch")))
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require.Equal(t, -1, g.MatchCmp([]byte{}))
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savePos = g.dataP
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word, nextPos := g.Next(nil)
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expected := fmt.Sprintf("%d longlongword %d", i, i)
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g.Reset(savePos)
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require.Equal(t, 0, g.MatchCmp([]byte(expected)))
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g.Reset(nextPos)
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if string(word) != expected {
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t.Errorf("expected %s, got (hex) [%s]", expected, word)
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}
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i++
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}
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if cs := checksum(d.filePath); cs != 3153486123 {
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// it's ok if hash changed, but need re-generate all existing snapshot hashes
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// in https://github.com/ledgerwatch/erigon-snapshot
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t.Errorf("result file hash changed, %d", cs)
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}
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}
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