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//go:build go1.18
// +build go1.18
package s2
import (
"bytes"
"fmt"
"testing"
"github.com/klauspost/compress/internal/fuzz"
"github.com/klauspost/compress/internal/snapref"
)
func FuzzEncodingBlocks(f *testing.F) {
fuzz.AddFromZip(f, "testdata/enc_regressions.zip", fuzz.TypeRaw, false)
fuzz.AddFromZip(f, "testdata/fuzz/block-corpus-raw.zip", fuzz.TypeRaw, testing.Short())
fuzz.AddFromZip(f, "testdata/fuzz/block-corpus-enc.zip", fuzz.TypeGoFuzz, testing.Short())
// Fuzzing tweaks:
const (
// Max input size:
maxSize = 8 << 20
)
f.Fuzz(func(t *testing.T, data []byte) {
if len(data) > maxSize {
return
}
writeDst := make([]byte, MaxEncodedLen(len(data)), MaxEncodedLen(len(data))+4)
writeDst = append(writeDst, 1, 2, 3, 4)
defer func() {
got := writeDst[MaxEncodedLen(len(data)):]
want := []byte{1, 2, 3, 4}
if !bytes.Equal(got, want) {
t.Fatalf("want %v, got %v - dest modified outside cap", want, got)
}
}()
compDst := writeDst[:MaxEncodedLen(len(data)):MaxEncodedLen(len(data))] // Hard cap
decDst := make([]byte, len(data))
comp := Encode(compDst, data)
decoded, err := Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeBetter(compDst, data)
decoded, err = Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeBest(compDst, data)
decoded, err = Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeSnappy(compDst, data)
decoded, err = snapref.Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeSnappyBetter(compDst, data)
decoded, err = snapref.Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
comp = EncodeSnappyBest(compDst, data)
decoded, err = snapref.Decode(decDst, comp)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, decoded) {
t.Error("block decoder mismatch")
return
}
if mel := MaxEncodedLen(len(data)); len(comp) > mel {
t.Error(fmt.Errorf("MaxEncodedLen Exceed: input: %d, mel: %d, got %d", len(data), mel, len(comp)))
return
}
})
}
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