pkg os, func OpenFile(string, int, FileMode) (*File, error)
pkg os, func SameFile(FileInfo, FileInfo) bool
pkg os, func Stat(string) (FileInfo, error)
pkg os, method (*File) Chmod(FileMode) error
pkg os, method (*File) Readdir(int) ([]FileInfo, error)
pkg os, method (*File) Stat() (FileInfo, error)
pkg os, method (*PathError) Error() string
pkg os, method (*PathError) Timeout() bool
pkg os, method (*PathError) Unwrap() error

	if !bytes.Contains(buf.Bytes(), []byte("PaxHeaders.0")) {
		t.Fatal("Expected at least one PAX header to be written.")
	}
	// Test that we can get a long name back out of the archive.
	reader := NewReader(&buf)
	hdr, err = reader.Next()
	if err != nil {
		t.Fatal(err)
	}
	if hdr.Name != longName {
		t.Fatal("Couldn't recover long file name")
	}
}

func TestPaxSymlink(t *testing.T) {

	realTmpDir, err := filepath.EvalSymlinks(tmpDir)
	if err != nil {
		t.Fatal(err)
	}
	realDir := filepath.Join(realTmpDir, "dir")
	realFile := filepath.Join(realDir, "file")

	tests := []struct {
		path, want string
	}{
		{dir, realDir},
		{linkToDir, realDir},
		{file, realFile},
		{link1, realFile},
		{link2, realFile},
	}
	for i, test := range tests {

// be saved in a MalformedCorpusError and returned, along with the most recent
// error.
func ReadCorpus(dir string, types []reflect.Type) ([]CorpusEntry, error) {
	files, err := os.ReadDir(dir)
	if os.IsNotExist(err) {
		return nil, nil // No corpus to read
	} else if err != nil {
		return nil, fmt.Errorf("reading seed corpus from testdata: %v", err)
	}
	var corpus []CorpusEntry
	var errs []error

}

func mustReadfolder(t *testing.T, folder string) string {
	result := ""
	fpathRoot := folder
	if !strings.HasPrefix(fpathRoot, ".") {
		fpathRoot = filepath.Join(env.IstioSrc, folder)
	}
	f, err := os.ReadDir(fpathRoot)
	if err != nil {
		t.Fatal(err)
	}
	for _, fpath := range f {
		bytes, err := os.ReadFile(filepath.Join(fpathRoot, fpath.Name()))
		if err != nil {
			t.Fatal(err)
		}
		result += "---\n"

// AST reader

// reader accumulates documentation for a single package.
// It modifies the AST: Comments (declaration documentation)
// that have been collected by the reader are set to nil
// in the respective AST nodes so that they are not printed
// twice (once when printing the documentation and once when
// printing the corresponding AST node).
type reader struct {
	mode Mode

)

// A Reader wraps an io.Reader and computes the MD5 checksum
// of the read content as ETag. Optionally, it also computes
// the SHA256 checksum of the content.
//
// If the reference values for the ETag and content SHA26
// are not empty then it will check whether the computed
// match the reference values.
type Reader struct {
	src         io.Reader
	bytesRead   int64
	expectedMin int64

	"strconv"
	"strings"
	"time"
)

// Reader provides sequential access to the contents of a tar archive.
// Reader.Next advances to the next file in the archive (including the first),
// and then Reader can be treated as an io.Reader to access the file's data.
type Reader struct {
	r    io.Reader
	pad  int64      // Amount of padding (ignored) after current file entry
	curr fileReader // Reader for current file entry

// the size of responses.
func NewReader(r *bufio.Reader) *Reader {
	return &Reader{R: r}
}

// ReadLine reads a single line from r,
// eliding the final \n or \r\n from the returned string.
func (r *Reader) ReadLine() (string, error) {
	line, err := r.readLineSlice(-1)
	return string(line), err
}

// ReadLineBytes is like [Reader.ReadLine] but returns a []byte instead of a string.

}

// A Reader reads records from a CSV-encoded file.
//
// As returned by [NewReader], a Reader expects input conforming to RFC 4180.
// The exported fields can be changed to customize the details before the
// first call to [Reader.Read] or [Reader.ReadAll].
//
// The Reader converts all \r\n sequences in its input to plain \n,