return
	}
	start, err := f.DataOffset()
	if err != nil {
		t.Errorf("%v: DataOffset error=%v", f.Name, err)
		return
	}
	got, err := io.ReadAll(rw)
	if err != nil {
		t.Errorf("%v: OpenRaw ReadAll error=%v", f.Name, err)
		return
	}
	end := uint64(start) + f.CompressedSize64
	want := raw[start:end]
	if !bytes.Equal(got, want) {
		t.Logf("got %q", got)

			origtarget := string(fsys[name].Data)
			if hdr.Linkname != origtarget {
				t.Fatalf("test fs has link content %s; archive header %v", origtarget, hdr.Linkname)
			}
		default:
			data, err := io.ReadAll(tr)
			if err != nil {
				t.Fatal(err)
			}
			origdata := fsys[name].Data
			if string(data) != string(origdata) {
				t.Fatalf("test fs has file content %v; archive header has %v", origdata, data)