UncompressedSize64: 5678,
	}); err != nil {
		t.Fatal(err)
	}
	if err := w.Close(); err != nil {
		t.Fatal(err)
	}
	b := buf.Bytes()

	var sig [4]byte
	binary.LittleEndian.PutUint32(sig[:], uint32(fileHeaderSignature))

	idx := bytes.Index(b, sig[:])
	if idx == -1 {
		t.Fatal("file header not found")
	}
	b = b[idx:]

	if err != ErrFormat {
		t.Errorf("zeroes: error=%v, want %v", err, ErrFormat)
	}

	// repeated directoryEndSignatures
	sig := make([]byte, 4)
	binary.LittleEndian.PutUint32(sig, directoryEndSignature)
	for i := 0; i < size-4; i += 4 {
		copy(b[i:i+4], sig)
	}
	_, err = NewReader(bytes.NewReader(b), size)
	if err != ErrFormat {
		t.Errorf("sigs: error=%v, want %v", err, ErrFormat)

	(*b)[0] = v
	*b = (*b)[1:]
}

func (b *writeBuf) uint16(v uint16) {
	binary.LittleEndian.PutUint16(*b, v)
	*b = (*b)[2:]
}

func (b *writeBuf) uint32(v uint32) {
	binary.LittleEndian.PutUint32(*b, v)
	*b = (*b)[4:]
}

func (b *writeBuf) uint64(v uint64) {
	binary.LittleEndian.PutUint64(*b, v)
	*b = (*b)[8:]

pkg encoding/binary, func Write(io.Writer, ByteOrder, interface{}) error
pkg encoding/binary, type ByteOrder interface { PutUint16, PutUint32, PutUint64, String, Uint16, Uint32, Uint64 }
pkg encoding/binary, type ByteOrder interface, PutUint16([]uint8, uint16)
pkg encoding/binary, type ByteOrder interface, PutUint32([]uint8, uint32)
pkg encoding/binary, type ByteOrder interface, PutUint64([]uint8, uint64)