ModifiedTime:     1234,
		ModifiedDate:     5678,
	}
	testHeaderRoundTrip(fh, fh.UncompressedSize, uint64(fh.UncompressedSize), t)
}

func TestFileHeaderRoundTrip64(t *testing.T) {
	fh := &FileHeader{
		Name:               "foo.txt",
		UncompressedSize64: 9876543210,
		ModifiedTime:       1234,
		ModifiedDate:       5678,
	}
	testHeaderRoundTrip(fh, uint32max, fh.UncompressedSize64, t)
}

	}
	if !bytes.Equal(rData, data) {
		t.Errorf("Data mismatch.\n got %q\nwant %q", rData, data)
	}
}

type headerRoundTripTest struct {
	h  *Header
	fm fs.FileMode
}

func TestHeaderRoundTrip(t *testing.T) {
	vectors := []headerRoundTripTest{{
		// regular file.
		h: &Header{
			Name:     "test.txt",
			Mode:     0644,
			Size:     12,
			ModTime:  time.Unix(1360600916, 0),