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|
package huff0
import (
"bytes"
"fmt"
"testing"
"github.com/klauspost/compress/internal/fuzz"
)
func FuzzCompress(f *testing.F) {
fuzz.AddFromZip(f, "testdata/fse_compress.zip", fuzz.TypeRaw, false)
f.Fuzz(func(t *testing.T, buf0 []byte) {
//use of Compress1X
var s Scratch
if len(buf0) > BlockSizeMax {
buf0 = buf0[:BlockSizeMax]
}
EstimateSizes(buf0, &s)
b, re, err := Compress1X(buf0, &s)
s.validateTable(s.cTable)
s.canUseTable(s.cTable)
if err != nil || b == nil {
return
}
min := s.minSize(len(buf0))
if len(s.OutData) < min {
t.Errorf("FuzzCompress: output data length (%d) below shannon limit (%d)", len(s.OutData), min)
}
if len(s.OutTable) == 0 {
t.Error("FuzzCompress: got no table definition")
}
if re {
t.Error("FuzzCompress: claimed to have re-used.")
}
if len(s.OutData) == 0 {
t.Error("FuzzCompress: got no data output")
}
dec, remain, err := ReadTable(b, nil)
//use of Decompress1X
out, err := dec.Decompress1X(remain)
if err != nil || len(out) == 0 {
return
}
if !bytes.Equal(out, buf0) {
t.Fatal(fmt.Sprintln("FuzzCompressX1 output mismatch\n", len(out), "org: \n", len(buf0)))
}
//use of Compress4X
s.Reuse = ReusePolicyAllow
b, reUsed, err := Compress4X(buf0, &s)
if err != nil || b == nil {
return
}
remain = b
if !reUsed {
dec, remain, err = ReadTable(b, dec)
if err != nil {
return
}
}
//use of Decompress4X
out, err = dec.Decompress4X(remain, len(buf0))
if err != nil || out == nil {
return
}
if !bytes.Equal(out, buf0) {
t.Fatal(fmt.Sprintln("FuzzCompressX4 output mismatch: ", len(out), ", org: ", len(buf0)))
}
})
}
func FuzzDecompress1x(f *testing.F) {
fuzz.AddFromZip(f, "testdata/huff0_decompress1x.zip", fuzz.TypeRaw, false)
f.Fuzz(func(t *testing.T, buf0 []byte) {
var s Scratch
_, remain, err := ReadTable(buf0, &s)
if err != nil {
return
}
out, err := s.Decompress1X(remain)
if err != nil || out == nil {
return
}
})
}
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