# File test/backup/tc_prodos_disks.rb, line 64
        def test_tree_structures
                dskname=File.dirname(__FILE__)+"//Geos (1988)(Berkeley Softworks)(Disk 1 of 4 Side A).dsk.gz"
                dsk=DSK.read(dskname)
                assert_equal(:prodos,dsk.file_system,"#{dskname} should have ProDOS file system")
                assert_equal(:prodos_from_dos,dsk.sector_order,"#{dskname} should have DOS sector order")
                assert_equal("GEOS.BOOT",dsk.volume_name)

                assert(dsk.files.length>0,"#{dskname} should have at least one file")
                tree_file=dsk.files["SYSTEM/Mouse"]
                assert(tree_file!=nil,"#{dskname} should have a file called SYSTEM/Mouse")
                assert_equal(645,tree_file.contents.length,"SYSTEM/Mouse should be 645 bytes long")

        end