"testing"
	"time"
)

func FuzzDead(f *testing.F) {
	go func() {
		c := filepath.Join(os.Getenv("GOCACHE"), "fuzz", "test", "FuzzDead")
		t := time.NewTicker(time.Second)
		for range t.C {
			files, _ := os.ReadDir(c)
			if len(files) > 0 {
				os.RemoveAll(c)
			}
		}
	}()

	f.Fuzz(func(t *testing.T, b []byte) {
		if len(b) == 8 &&
			b[0] == 'h' &&
			b[1] == 'e' &&
			b[2] == 'l' &&
			b[3] == 'l' &&

		t.Helper()
		fi, err := d.Readdir(n)
		if err != wantErr {
			t.Fatalf("Readdir of %d got error %v, want %v", n, err, wantErr)
		}
		if g, e := len(fi), want; g != e {
			t.Errorf("Readdir of %d got %d files, want %d", n, g, e)
		}
	}

	readDirExpect := func(n, want int, wantErr error) {
		t.Helper()
		de, err := d.ReadDir(n)
		if err != wantErr {

	if parentdir == "" || base == "" {
		// skip os.Readdir test of files without directory or file name component,
		// such as directories with slash at the end or Windows device names.
		return
	}

	parent, err := os.Open(parentdir)
	if err != nil {
		t.Error(err)
		return
	}
	defer parent.Close()

	fis, err := parent.Readdir(-1)
	if err != nil {
		t.Error(err)
		return
	}

	}
	if checkFailed {
		return errors.New("We need to fix the above errors.")
	}
	return nil
}

func processFile(e2ePath string) error {
	regGoFile := regexp.MustCompile(`.*\.go`)

	files, err := os.ReadDir(e2ePath)
	if err != nil {
		return fmt.Errorf("Failed to read dir %s: %w", e2ePath, err)
	}
	for _, file := range files {
		if file.IsDir() {
			continue
		}
		if !regGoFile.MatchString(file.Name()) {

import (
	"bytes"
	"image"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func FuzzDecode(f *testing.F) {
	if testing.Short() {
		f.Skip("Skipping in short mode")
	}

	testdata, err := os.ReadDir("../testdata")
	if err != nil {
		f.Fatalf("failed to read testdata directory: %s", err)
	}
	for _, de := range testdata {
		if de.IsDir() || !strings.HasSuffix(de.Name(), ".png") {
			continue
		}

	return nil
}

// Pipe is a fake call that returns nil.
func (*FakeOS) Pipe() (r *os.File, w *os.File, err error) {
	return nil, nil, nil
}

// ReadDir is a fake call that returns the files under the directory.
func (f *FakeOS) ReadDir(dirname string) ([]os.DirEntry, error) {
	if f.ReadDirFn != nil {
		return f.ReadDirFn(dirname)
	}
	return nil, nil
}

	RemoveAll(path string) error
	Remove(name string) error

	// from "os"
	ReadFile(filename string) ([]byte, error)
	TempDir(dir, prefix string) (string, error)
	TempFile(dir, prefix string) (File, error)
	ReadDir(dirname string) ([]os.DirEntry, error)
	Walk(root string, walkFn filepath.WalkFunc) error
}

// File is an interface that we can use to mock various filesystem operations typically

import (
	"bytes"
	"image"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func FuzzDecode(f *testing.F) {
	if testing.Short() {
		f.Skip("Skipping in short mode")
	}

	testdata, err := os.ReadDir("../testdata")
	if err != nil {
		f.Fatalf("failed to read testdata directory: %s", err)
	}
	for _, de := range testdata {
		if de.IsDir() || !strings.HasSuffix(de.Name(), ".jpeg") {
			continue
		}

	d, err := Open(dir)
	if err != nil {
		t.Fatal(err)
	}
	defer d.Close()
	fis, err := d.Readdir(2) // notably, greater than zero
	if len(fis) == 0 && err == nil {
		// This is what used to happen (Issue 16919)
		t.Fatal("Readdir = empty slice & err == nil")
	}
	if len(fis) != 0 || err != io.EOF {
		t.Errorf("Readdir = %d entries: %v; want 0, io.EOF", len(fis), err)
		for i, fi := range fis {

		return &buf
	},
}

func (d *dirInfo) close() {
	d.h = 0
	if d.buf != nil {
		dirBufPool.Put(d.buf)
		d.buf = nil
	}
}

// allowReadDirFileID indicates whether File.readdir should try to use FILE_ID_BOTH_DIR_INFO
// if the underlying file system supports it.
// Useful for testing purposes.
var allowReadDirFileID = true

func (d *dirInfo) init(h syscall.Handle) {
	d.h = h