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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package fuzztest contains a common fuzzer test.
package fuzztest
import (
"flag"
"io/ioutil"
"os"
"path/filepath"
"sort"
"testing"
)
var corpus = flag.String("corpus", "corpus", "directory containing the fuzzer corpus")
// Test executes a fuzz function for every entry in the corpus.
func Test(t *testing.T, fuzz func(b []byte) int) {
dir, err := os.Open(*corpus)
if err != nil {
t.Fatal(err)
}
infos, err := dir.Readdir(0)
if err != nil {
t.Fatal(err)
}
var names []string
for _, info := range infos {
names = append(names, info.Name())
}
sort.Strings(names)
for _, name := range names {
t.Run(name, func(t *testing.T) {
b, err := ioutil.ReadFile(filepath.Join(*corpus, name))
if err != nil {
t.Fatal(err)
}
b = b[:len(b):len(b)] // set cap to len
fuzz(b)
})
}
}
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