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231e468e19
git-subtree-dir: erigon-lib git-subtree-mainline:3c8cbda809git-subtree-split:93d9c9d9fe
98 lines
2.3 KiB
Go
98 lines
2.3 KiB
Go
//go:build !nofuzz
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/*
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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 recsplit
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import (
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"context"
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"path/filepath"
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"testing"
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"github.com/ledgerwatch/log/v3"
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)
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// go test -trimpath -v -fuzz=FuzzRecSplit -fuzztime=10s ./recsplit
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func FuzzRecSplit(f *testing.F) {
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logger := log.New()
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f.Add(2, []byte("1stkey2ndkey"))
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f.Fuzz(func(t *testing.T, count int, in []byte) {
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if count < 1 {
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t.Skip()
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}
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if len(in) < count {
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t.Skip()
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}
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// split in into count keys
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dups := make(map[string]struct{})
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// Length of one key
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l := (len(in) + count - 1) / count
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var i int
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for i = 0; i < len(in)-l; i += l {
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dups[string(in[i:i+l])] = struct{}{}
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}
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dups[string(in[i:])] = struct{}{}
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if len(dups) != count {
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t.Skip()
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}
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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: count,
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Enums: true,
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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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var off uint64
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for i = 0; i < len(in)-l; i += l {
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if err := rs.AddKey(in[i:i+l], off); err != nil {
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t.Fatal(err)
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}
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off++
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}
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if err := rs.AddKey(in[i:], off); err != nil {
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t.Fatal(err)
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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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// Check that there is a bijection
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idx := MustOpen(indexFile)
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bitCount := (count + 63) / 64
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bits := make([]uint64, bitCount)
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reader := NewIndexReader(idx)
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for i = 0; i < len(in)-l; i += l {
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off = reader.Lookup(in[i : i+l])
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if int(off) >= count {
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t.Errorf("off %d >= count %d", off, count)
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}
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mask := uint64(1) << (off & 63)
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if bits[off>>6]&mask != 0 {
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t.Fatalf("no bijection count=%d, i=%d", count, i/l)
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}
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bits[off>>6] |= mask
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}
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})
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}
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